Thermal Analysis of High Entropy Rare Earth Oxides

Ushakov, Sergey V.; Hayun, Shmuel; Gong, Weiping; Navrotsky, Alexandra

doi:10.3390/ma13143141

Title: Thermal Analysis of High Entropy Rare Earth Oxides

Abstract

Phase transformations in multicomponent rare earth sesquioxides were studied by splat quenching from the melt, high temperature differential thermal analysis and synchrotron X-ray diffraction on laser-heated samples. Three compositions were prepared by the solution combustion method: (La,Sm,Dy,Er,RE)₂O₃, where all oxides are in equimolar ratios and RE is Nd or Gd or Y. After annealing at 800 °C, all powders contained mainly a phase of C-type bixbyite structure. After laser melting, all samples were quenched in a single-phase monoclinic B-type structure. Thermal analysis indicated three reversible phase transitions in the range 1900–2400 °C, assigned as transformations into A, H, and X rare earth sesquioxides structure types. Unit cell volumes and volume changes on C-B, B-A, and H-X transformations were measured by X-ray diffraction and consistent with the trend in pure rare earth sesquioxides. The formation of single-phase solid solutions was predicted by Calphad calculations. The melting point was determined for the (La,Sm,Dy,Er,Nd)₂O₃ sample as 2456 ± 12 °C, which is higher than for any of constituent oxides. An increase in melting temperature is probably related to nonideal mixing in the solid and/or the melt and prompts future investigation of the liquidus surface in Sm₂O₃-Dy₂O₃, Sm₂O₃-Er₂O₃, and Dy₂O₃-Er₂O₃ systems.

Authors:

^[1];

^[2];

^[3];

^[1]

Arizona State Univ., Tempe, AZ (United States)
Ben-Gurion Univ. of the Negev, Beer-Sheva (Israel)
Huizhou Univ. (China)

Publication Date:: Tue Jul 14 00:00:00 EDT 2020

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Org.:: National Science Foundation (NSF); USDOE Office of Science (SC)

OSTI Identifier:: 1660992

Grant/Contract Number:: NSF-DMR 1835848; NSF-DMR 2015852; AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Materials

Additional Journal Information:: Journal Volume: 13; Journal Issue: 14; Journal ID: ISSN 1996-1944

Publisher:: MDPI

Country of Publication:: United States

Language:: ENGLISH

Subject:: 36 MATERIALS SCIENCE; high entropy oxides; rare earth oxides; laser melting; aerodynamic levitation; phase transition; melting; thermodynamics

Citation Formats


                    Ushakov, Sergey V., Hayun, Shmuel, Gong, Weiping, and Navrotsky, Alexandra. Thermal Analysis of High Entropy Rare Earth Oxides.  United States: N. p., 2020. 
Web.  doi:10.3390/ma13143141.

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                    Ushakov, Sergey V., Hayun, Shmuel, Gong, Weiping, & Navrotsky, Alexandra. Thermal Analysis of High Entropy Rare Earth Oxides.  United States.  https://doi.org/10.3390/ma13143141

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                    Ushakov, Sergey V., Hayun, Shmuel, Gong, Weiping, and Navrotsky, Alexandra. Tue .  
"Thermal Analysis of High Entropy Rare Earth Oxides".  United States.  https://doi.org/10.3390/ma13143141.  https://www.osti.gov/servlets/purl/1660992.

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@article{osti_1660992,

  title        = {Thermal Analysis of High Entropy Rare Earth Oxides},

  author       = {Ushakov, Sergey V. and Hayun, Shmuel and Gong, Weiping and Navrotsky, Alexandra},

  abstractNote = {Phase transformations in multicomponent rare earth sesquioxides were studied by splat quenching from the melt, high temperature differential thermal analysis and synchrotron X-ray diffraction on laser-heated samples. Three compositions were prepared by the solution combustion method: (La,Sm,Dy,Er,RE)2O3, where all oxides are in equimolar ratios and RE is Nd or Gd or Y. After annealing at 800 °C, all powders contained mainly a phase of C-type bixbyite structure. After laser melting, all samples were quenched in a single-phase monoclinic B-type structure. Thermal analysis indicated three reversible phase transitions in the range 1900–2400 °C, assigned as transformations into A, H, and X rare earth sesquioxides structure types. Unit cell volumes and volume changes on C-B, B-A, and H-X transformations were measured by X-ray diffraction and consistent with the trend in pure rare earth sesquioxides. The formation of single-phase solid solutions was predicted by Calphad calculations. The melting point was determined for the (La,Sm,Dy,Er,Nd)2O3 sample as 2456 ± 12 °C, which is higher than for any of constituent oxides. An increase in melting temperature is probably related to nonideal mixing in the solid and/or the melt and prompts future investigation of the liquidus surface in Sm2O3-Dy2O3, Sm2O3-Er2O3, and Dy2O3-Er2O3 systems.},

  doi          = {10.3390/ma13143141},

  journal      = {Materials},

  number       = 14,

  volume       = 13,

  place        = {United States},

  year         = {Tue Jul 14 00:00:00 EDT 2020},

  month        = {Tue Jul 14 00:00:00 EDT 2020}

}

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Journal Article Tang, M ; Valdez, J A ; Sickafus, K E ; ... - Applied Physics Letters

An order-to-disorder (OD) transformation induced by ion irradiation in rare earth (RE) sesquioxides, Dy{sub 2}O{sub 3}, Er{sub 2}O{sub 3}, and Lu{sub 2}O{sub 3}, was studied using grazing incidence x-ray diffraction and transmission electron microscopy. These sesquioxides are characterized by a cubic C-type RE structure known as bixbyite. They were irradiated with heavy Kr{sup ++} ions (300 keV) and light Ne{sup +} ions (150 keV) at cryogenic temperature ({approx}120 K). In each oxide, following a relatively low ion irradiation dose of {approx}2.5 displacements per atom, the ordered bixbyite structure was transformed to a disordered, anion-deficient fluorite structure. This OD transformation wasmore »« less
https://doi.org/10.1063/1.2720716
Tuning the melting point and phase stability of rare-earth oxides to facilitate their crystal growth from the melt

Journal Article Pianassola, Matheus ; Anderson, Kaden L. ; Safin, Joshua ; ... - Journal of Advanced Ceramics

The challenge of growing rare-earth (RE) sesquioxide crystals can be overcome by tailoring their structural stability and melting point via composition engineering. This work contributes to the advancement of the field of crystal growth of high-entropy oxides. A compound with only small REs (Lu,Y,Ho,Yb,Er)₂O₃ maintains a cubic C-type structure upon cooling from the melt, as observed via in-situ high-temperature neutron diffraction on aerodynamically levitated samples. On the other hand, a compound with a mixture of small and large REs (Lu,Y,Ho,Nd,La)₂O₃ crystallizes as a mixture of a primary C-type phase with an unstable secondary phase. Crystals of compositions (Lu,Y,Ho,Nd,La)₂O₃ and (Lu,Y,Gd,Nd,La)₂O₃more »« less
https://doi.org/10.1007/s40145-022-0625-z

Full Text Available
Ternary compounds REAgSb{sub 2}, RE = Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm: Magnetism and crystal structure

Journal Article Sologub, O ; Leithe-Jasper, A ; Rogl, P ; ... - Journal of Solid State Chemistry

Ternary compounds REAgSb{sub 2}, RE = Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, have been synthesized by arc melting followed by a heat treatment at 600 or 800{degrees}C for 300 hr. The novel phases were all found to be isotypic with the structure type of ZrCuSi{sub 2}. Precise atom parameters have been derived for CeAgSb{sub 2} from X-ray single crystal counter data: space group P4/nmm, a = 0.43641(9) nm, c = 1.0722(4) nm, and Z = 2. For 274 reflections ({vert_bar}F{sub o}{vert_bar} > 3{sigma}) the residual values are R{sub F} = {Sigma}{vert_bar}{Delta}F{vert_bar}/{Sigma}{vert_bar}F{sub o}{vert_bar} = 0.024more »« less
https://doi.org/10.1006/jssc.1995.1157
Rare earth niobate coordination polymers

Journal Article Muniz, Collin N. ; Patel, Hiral ; Fast, Dylan B. ; ... - Journal of Solid State Chemistry

Rare-earth (RE) coordination polymers are infinitely tailorable to yield luminescent materials for various applications. In this paper we described the synthesis of a heterometallic rare-earth coordination compound ((CH₃)₂SO)₃(RE)NbO(C₂O₄)₃ ((CH₃)₂SO) = dimethylsulfoxide, DMSO, (C₂O₂ = oxalate), (RE=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb). The structure was obtained from single crystal X-ray diffraction of the La analogue. The Nb⁼O and DMSO terminal-bonding character guides assembly of an open framework structure with noncentrosymmetric RE-coordination geometry, and large spacing between the RE centers. A second structure was observed by PXRD for the smaller rare earths (Dy, Ho, Er, Yb); this structure has notmore »« less
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https://doi.org/10.1016/j.jssc.2017.12.034

Full Text Available
Studies on some ternary oxyborates of the Na{sub 2}O-Me{sub 2}O{sub 3}-B{sub 2}O{sub 3} (Me=rare earth or aluminum) systems: Synthesis, structure and crystal growth

Journal Article Peshev, P ; Pechev, S ; Nikolov, V ; ... - Journal of Solid State Chemistry

Sodium rare-earth oxyborates Na{sub 2}RE{sub 2}O(BO{sub 3}){sub 2} (RE=Y, Nd, Er) were prepared for the first time in the present study. They were found to be isostructural with phases of the same composition containing Sm, Eu or Gd and reported by Corbel et al. [J. Solid State Chem.144 (1999) 35-44]. It was shown that the yttrium and erbium compounds could be synthesized at 900-1000deg. C by a solid-state reaction between oxides in an equimolecular ratio. With both oxyborates melting led to decomposition into a mixture of Y(Er)BO{sub 3}, Y{sub 2}(Er{sub 2})O{sub 3} and Na{sub 2}B{sub 4}O{sub 7}. Just the oppositemore »« less
https://doi.org/10.1016/j.jssc.2006.01.027

Similar Records

Title: Thermal Analysis of High Entropy Rare Earth Oxides

Abstract

Citation Formats

Synthesis of superfine high-entropy metal diboride powders journal, July 2019

Properties of the new electronic device material LaGdO 3 : Properties of the new electronic device material LaGdO journal, July 2013

Drop-and-catch (DnC) calorimetry using aerodynamic levitation and laser heating journal, October 2016

Atmospheric Pressure Synthesis of Heavy Rare Earth Sesquioxides Nanoparticles of the Uncommon Monoclinic Phase journal, November 2007

The ErY, TbHo, TbEr, DyHo, DyEr and HoEr phase systems journal, April 1973

On the Theory of Super-Lattice Structures in Alloys journal, January 1935

Thermodynamics of rare earth sesquioxides journal, May 2007

Multicomponent equiatomic rare earth oxides journal, August 2016

Thermodynamic assessment of BaO–Ln 2 O 3 (Ln = La, Pr, Eu, Gd, Er) systems journal, February 2020

Thermodynamically Improbable Phase Diagrams journal, April 1991

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal, September 1976

Computational Thermodynamics Aided High-Entropy Alloy Design journal, June 2012

Oxygen permeability, thermal expansion and mixed conductivity of GdxCe0.8−xPr0.2O2−δ, x=0, 0.15, 0.2 journal, November 2006

Aerodynamic levitator for in situ x-ray structure measurements on high temperature and molten nuclear fuel materials journal, July 2016

Melting temperatures of refractory oxides: Part I journal, January 1982

‘High entropy alloys’—‘semi-impossible’ regular solid solutions? journal, March 2015

Phase transformations in oxides above 2000°C: experimental technique development journal, October 2018

Processing and Properties of High-Entropy Ultra-High Temperature Carbides journal, June 2018

GSAS-II : the genesis of a modern open-source all purpose crystallography software package journal, March 2013

Sintering Characteristics of Rare-Earth Oxides journal, December 1958

Exploration of high entropy ceramics (HECs) with computational thermodynamics - A case study with LaMnO3±δ journal, November 2019

Optical temperature sensing of Er 3+ /Yb 3+ doped LaGdO 3 based on fluorescence intensity ratio and lifetime thermometry journal, February 2018

Thermodynamic assessment of the Ho-Tb, Ho-Dy, Ho-Er, Er-Tb, and Er-Dy systems journal, March 2000

Phase transformations in Ln 2 O 3 materials irradiated with swift heavy ions journal, November 2015

Phase equilibria in systems involving the rare-earth oxides. Part I. Polymorphism of the oxides of the trivalent rare-earth ions journal, July 1960

A five-component entropy-stabilized fluorite oxide journal, September 2018

Chapter 27: The binary rare earth oxides book, January 1979

Phase equilibria in systems involving the rare-earth oxides. Part II. Solid state reactions in trivalent rare-earth oxide systems journal, July 1960

Stability of interlanthanide perovskites ABO3 (A≡La–Pr; B≡Y, Ho–Lu) journal, April 2016

Melting temperatures of refractory oxides - Part II: Lanthanoid sesquioxides journal, January 1989

Cooperative determination of the melting point of alumina journal, January 1970

High entropy oxides for reversible energy storage journal, August 2018

Structure and thermal expansion of Lu2O3 and Yb2O3 up to the melting points journal, November 2017

High entropy oxides as anode material for Li-ion battery applications: A practical approach journal, March 2019

Crystal chemistry, stability and properties of interlanthanide perovskites: A review journal, February 2017

Synthesis of single-phase high-entropy carbide powders journal, March 2019

Formation of simple crystal structures in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements journal, August 2004

Etude par diffraction neutronique des structures de haute temperature de La2O3 et Nd2O3 journal, March 1979

Polymorphism of rare-earth sesquioxides journal, July 1965

Density functional calculations of the enthalpies of formation of rare-earth orthophosphates journal, May 2012

Modeling short-range ordering in solutions journal, October 2007

Etude à haute temperature du diagramme d'equilibre du système La2O3Yb2O3 journal, March 1972

High‐entropy, phase‐constrained, lanthanide sesquioxide journal, July 2019

Etude a haute température des systèmes formes par le sesquioxyde de lanthane et les sesquioxydes de lanthanides. I. Diagrammes de phases (1400°C < T < T Liquide) journal, February 1976

High‐Entropy Oxides: Fundamental Aspects and Electrochemical Properties journal, March 2019

Entropy-stabilized oxides journal, September 2015

Upconversion and Optical Nanothermometry in LaGdO 3 : Er 3+ Nanocrystals in the RT to 900 K Range journal, November 2019

The International Temperature Scale of 1990 (ITS-90) journal, January 1990

High-entropy fluorite oxides journal, August 2018

Critical evaluation of thermodynamic properties of rare earth sesquioxides (RE = La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y) journal, September 2017

Temperature gradients for thermophysical and thermochemical property measurements to 3000 °C for an aerodynamically levitated spheroid journal, January 2019

Development and exploration of refractory high entropy alloys—A review journal, June 2018

Gassing Behavior of High‐Entropy Oxide Anode and Oxyfluoride Cathode Probed Using Differential Electrochemical Mass Spectrometry journal, April 2020

Neutron scattering evidence for fast ionic oxygen diffusion in the high temperature phases of La2O3 journal, January 1979

Experimental Approaches to the Thermodynamics of Ceramics Above 1500°C journal, March 2012

Novel processing route for the fabrication of bulk high-entropy metal diborides journal, January 2019

Evidence for Jahn-Teller compression in the (Mg, Co, Ni, Cu, Zn)O entropy-stabilized oxide: A DFT study journal, April 2018

The Thermodynamic Properties of the f -Elements and their Compounds. Part 2. The Lanthanide and Actinide Oxides journal, March 2014

Die Gesetze der Krystallochemie journal, May 1926

The Rietveld method journal, August 2014

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes journal, May 2004

Interaction of Yttrium, Lanthanum, and Samarium Oxides at 1600°C journal, January 2020

A critical review of high entropy alloys and related concepts journal, January 2017

A new class of high-entropy perovskite oxides journal, January 2018

CALPHAD, first and second generation – Birth of the materials genome journal, January 2014

Structure and Thermal Expansion of YSZ and La 2 Zr 2 O 7 Above 1500°C from Neutron Diffraction on Levitated Samples journal, July 2015

Direct measurements of fusion and phase transition enthalpies in lanthanum oxide journal, February 2011

Phase Relationships in the Rare Earth Sesquioxides at High Pressure journal, May 1966

Pressure-induced phase transformations in cubic Gd2O3 journal, October 2009

Electrochemical Investigation of Molten Lanthanum-Yttrium Oxide for Selective Liquid Rare-Earth Metal Extraction journal, January 2019

The structure of B-type Sm2O3. A powder neutron diffraction study using enriched 154Sm journal, September 2011

OpenCalphad - a free thermodynamic software journal, January 2015

Phase relations in the ZrO 2 -Sm 2 O 3 -Y 2 O 3 -Al 2 O 3 system: experimental investigation and thermodynamic modelling journal, December 2012

Pressure induced structural phase transition in rare earth sesquioxide Tm 2 O 3 : Experiment and ab initio calculations journal, October 2018

High-Entropy Metal Diborides: A New Class of High-Entropy Materials and a New Type of Ultrahigh Temperature Ceramics journal, November 2016

Formation enthalpies of LaLn׳O3 (Ln׳=Ho, Er, Tm and Yb) interlanthanide perovskites journal, July 2015

Spectroscopic study of ordering in non-stoichiometric magnesium aluminate spinel journal, August 2015

Synthesis of superfine high-entropy metal diboride powders
journal, July 2019

Properties of the new electronic device material LaGdO ₃ : Properties of the new electronic device material LaGdO
journal, July 2013

Drop-and-catch (DnC) calorimetry using aerodynamic levitation and laser heating
journal, October 2016

Atmospheric Pressure Synthesis of Heavy Rare Earth Sesquioxides Nanoparticles of the Uncommon Monoclinic Phase
journal, November 2007

The ErY, TbHo, TbEr, DyHo, DyEr and HoEr phase systems
journal, April 1973

On the Theory of Super-Lattice Structures in Alloys
journal, January 1935

Thermodynamics of rare earth sesquioxides
journal, May 2007

Multicomponent equiatomic rare earth oxides
journal, August 2016

Thermodynamic assessment of BaO–Ln ₂ O ₃ (Ln = La, Pr, Eu, Gd, Er) systems
journal, February 2020

Thermodynamically Improbable Phase Diagrams
journal, April 1991

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976

Computational Thermodynamics Aided High-Entropy Alloy Design
journal, June 2012

Oxygen permeability, thermal expansion and mixed conductivity of GdxCe0.8−xPr0.2O2−δ, x=0, 0.15, 0.2
journal, November 2006

Aerodynamic levitator for in situ x-ray structure measurements on high temperature and molten nuclear fuel materials
journal, July 2016

Melting temperatures of refractory oxides: Part I
journal, January 1982

‘High entropy alloys’—‘semi-impossible’ regular solid solutions?
journal, March 2015

Phase transformations in oxides above 2000°C: experimental technique development
journal, October 2018

Processing and Properties of High-Entropy Ultra-High Temperature Carbides
journal, June 2018

GSAS-II : the genesis of a modern open-source all purpose crystallography software package
journal, March 2013

Sintering Characteristics of Rare-Earth Oxides
journal, December 1958

Exploration of high entropy ceramics (HECs) with computational thermodynamics - A case study with LaMnO3±δ
journal, November 2019

Optical temperature sensing of Er 3+ /Yb 3+ doped LaGdO 3 based on fluorescence intensity ratio and lifetime thermometry
journal, February 2018

Thermodynamic assessment of the Ho-Tb, Ho-Dy, Ho-Er, Er-Tb, and Er-Dy systems
journal, March 2000

Phase transformations in ${Ln}_{2} O_{3}$ materials irradiated with swift heavy ions
journal, November 2015

Phase equilibria in systems involving the rare-earth oxides. Part I. Polymorphism of the oxides of the trivalent rare-earth ions
journal, July 1960

A five-component entropy-stabilized fluorite oxide
journal, September 2018

Chapter 27: The binary rare earth oxides
book, January 1979

Phase equilibria in systems involving the rare-earth oxides. Part II. Solid state reactions in trivalent rare-earth oxide systems
journal, July 1960

Stability of interlanthanide perovskites ABO3 (A≡La–Pr; B≡Y, Ho–Lu)
journal, April 2016

Melting temperatures of refractory oxides - Part II: Lanthanoid sesquioxides
journal, January 1989

Cooperative determination of the melting point of alumina
journal, January 1970

High entropy oxides for reversible energy storage
journal, August 2018

Structure and thermal expansion of Lu2O3 and Yb2O3 up to the melting points
journal, November 2017

High entropy oxides as anode material for Li-ion battery applications: A practical approach
journal, March 2019

Crystal chemistry, stability and properties of interlanthanide perovskites: A review
journal, February 2017

Synthesis of single-phase high-entropy carbide powders
journal, March 2019

Formation of simple crystal structures in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements
journal, August 2004

Etude par diffraction neutronique des structures de haute temperature de La2O3 et Nd2O3
journal, March 1979

Polymorphism of rare-earth sesquioxides
journal, July 1965

Density functional calculations of the enthalpies of formation of rare-earth orthophosphates
journal, May 2012

Modeling short-range ordering in solutions
journal, October 2007

Etude à haute temperature du diagramme d'equilibre du système La2O3Yb2O3
journal, March 1972

High‐entropy, phase‐constrained, lanthanide sesquioxide
journal, July 2019

Etude a haute température des systèmes formes par le sesquioxyde de lanthane et les sesquioxydes de lanthanides. I. Diagrammes de phases (1400°C < T < T Liquide)
journal, February 1976

High‐Entropy Oxides: Fundamental Aspects and Electrochemical Properties
journal, March 2019

Entropy-stabilized oxides
journal, September 2015

Upconversion and Optical Nanothermometry in LaGdO ₃ : Er ³⁺ Nanocrystals in the RT to 900 K Range
journal, November 2019

The International Temperature Scale of 1990 (ITS-90)
journal, January 1990

High-entropy fluorite oxides
journal, August 2018

Critical evaluation of thermodynamic properties of rare earth sesquioxides (RE = La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y)
journal, September 2017

Temperature gradients for thermophysical and thermochemical property measurements to 3000 °C for an aerodynamically levitated spheroid
journal, January 2019

Development and exploration of refractory high entropy alloys—A review
journal, June 2018

Gassing Behavior of High‐Entropy Oxide Anode and Oxyfluoride Cathode Probed Using Differential Electrochemical Mass Spectrometry
journal, April 2020

Neutron scattering evidence for fast ionic oxygen diffusion in the high temperature phases of La2O3
journal, January 1979

Experimental Approaches to the Thermodynamics of Ceramics Above 1500°C
journal, March 2012

Novel processing route for the fabrication of bulk high-entropy metal diborides
journal, January 2019

Evidence for Jahn-Teller compression in the (Mg, Co, Ni, Cu, Zn)O entropy-stabilized oxide: A DFT study
journal, April 2018

The Thermodynamic Properties of the f -Elements and their Compounds. Part 2. The Lanthanide and Actinide Oxides
journal, March 2014

Die Gesetze der Krystallochemie
journal, May 1926

The Rietveld method
journal, August 2014

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
journal, May 2004

Interaction of Yttrium, Lanthanum, and Samarium Oxides at 1600°C
journal, January 2020

A critical review of high entropy alloys and related concepts
journal, January 2017

A new class of high-entropy perovskite oxides
journal, January 2018

CALPHAD, first and second generation – Birth of the materials genome
journal, January 2014

Structure and Thermal Expansion of YSZ and La ₂ Zr ₂ O ₇ Above 1500°C from Neutron Diffraction on Levitated Samples
journal, July 2015

Direct measurements of fusion and phase transition enthalpies in lanthanum oxide
journal, February 2011

Phase Relationships in the Rare Earth Sesquioxides at High Pressure
journal, May 1966

Pressure-induced phase transformations in cubic Gd2O3
journal, October 2009

Electrochemical Investigation of Molten Lanthanum-Yttrium Oxide for Selective Liquid Rare-Earth Metal Extraction
journal, January 2019

The structure of B-type Sm2O3. A powder neutron diffraction study using enriched 154Sm
journal, September 2011

OpenCalphad - a free thermodynamic software
journal, January 2015

Phase relations in the ZrO ₂ -Sm ₂ O ₃ -Y ₂ O ₃ -Al ₂ O ₃ system: experimental investigation and thermodynamic modelling
journal, December 2012

Pressure induced structural phase transition in rare earth sesquioxide Tm ₂ O ₃ : Experiment and ab initio calculations
journal, October 2018

High-Entropy Metal Diborides: A New Class of High-Entropy Materials and a New Type of Ultrahigh Temperature Ceramics
journal, November 2016

Formation enthalpies of LaLn׳O3 (Ln׳=Ho, Er, Tm and Yb) interlanthanide perovskites
journal, July 2015

Spectroscopic study of ordering in non-stoichiometric magnesium aluminate spinel
journal, August 2015

Thermochemistry of BaSm ₂ O ₄ and thermodynamic assessment of the BaO–Sm ₂ O ₃ system
journal, June 2018

The concept of mineral systems and its application to the study of mineral diversity and evolution [The concept of mineral systems and its application to the study of mineral diversity and evolution]
journal, August 2018

High-Pressure Structural Transitions of Sc ₂ O ₃ by X-ray Diffraction, Raman Spectra, and Ab Initio Calculations
journal, September 2009