skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of heating rate on properties of transparent aluminum oxynitride sintered by spark plasma sintering

Journal Article · · Journal of the American Ceramic Society
DOI:https://doi.org/10.1111/jace.16030· OSTI ID:1611089

Abstract High heating rates ranging from 50 to 250°C/min are selected to rapidly sinter transparent aluminum oxynitride (Al ON ) ceramics by spark plasma sintering ( SPS ) at 1600°C under 60 MPa using a bimodal Al ON powder synthesized by the carbothermal reduction and nitridation method. With 1 minute holding time before cooling, all the specimens show high density and high transparence. The maximum transmittance is up to 74.5%‐80.6%, where the maximum transmittance is positively correlated with the heating rate. Further analysis reveals that faster heating rates enable the decrease in the amount of the Al ON phase decomposed into the α‐Al 2 O 3 and AlN phases during heating. These α‐Al 2 O 3 and AlN phases have to be converted back to Al ON at the final stage of sintering, which indicates that a decrease in the amount of the α‐Al 2 O 3 and AlN phases via the boosted heating leads to the higher transmittance of the Al ON ceramics. The high heating rates and short holding duration of the SPS utilized in this study result in the fine grain size of the obtained ceramics (1‐6 μm) compared to that of the Al ON ceramics fabricated by the conventional sintering method. This effect of high heating rates is confirmed by the coupled densification‐grain growth modeling. In turn, the obtained Al ON specimens exhibit a Vickers hardness of 15.87‐16.62 GPa.

Research Organization:
San Diego State Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Key Research and Development Program of China; Dalian Science and Technology Innovation Fund; USDOE
Grant/Contract Number:
SC0008581; 2017YFB0310300; 2018J12GX032; DE‐SC0008581
OSTI ID:
1611089
Alternate ID(s):
OSTI ID: 1468495
Journal Information:
Journal of the American Ceramic Society, Vol. 102, Issue 2; ISSN 0002-7820
Publisher:
American Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (37)

Microstructure and optical properties of transparent aluminum oxynitride ceramics by hot isostatic pressing journal June 2014
Highly Dense, Transparent α-Al 2 O 3 Ceramics From Ultrafine Nanoparticles Via a Standard SPS Sintering journal March 2013
Direct comparison between hot pressing and electric field-assisted sintering of submicron alumina journal October 2009
Grain growth enhancement in alumina during hot isostatic pressing journal October 1991
Spark plasma sintering of tantalum carbide journal September 2010
Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method journal September 2014
Current understanding and future research directions at the onset of the next century of sintering science and technology journal May 2017
Improved transparency and hardness in α-alumina ceramics fabricated by high-pressure SPS of nanopowders journal January 2017
Determining the Strength of Coarse-Grained AlON and Spinel journal December 2013
Effects of heating rate on densification and grain growth during field-assisted sintering of α-Al2O3 and MoSi2 powders journal October 2001
First-Principles Study on Site Preference of Aluminum Vacancy and Nitrogen Atoms in γ-Alon journal February 2013
Fast densification mechanism of bimodal powder during pressureless sintering of transparent AlON ceramics journal February 2016
Highly Transparent AlON Pressurelessly Sintered from Powder Synthesized by a Novel Carbothermal Nitridation Method journal May 2012
Effects of heating rate on microstructure and transparency of spark-plasma-sintered alumina journal January 2009
Strengthening mechanism of twin lamellas in transparent AlON ceramics journal August 2018
Highly transparent AlON ceramics sintered from powder synthesized by carbothermal reduction nitridation journal May 2016
Fundamental Aspects of Spark Plasma Sintering: II. Finite Element Analysis of Scalability journal May 2012
A fast pressureless sintering method for transparent AlON ceramics by using a bimodal particle size distribution powder journal April 2015
Preparation of high performance bulk Fe–N alloy by spark plasma sintering journal January 2016
Grain Size-Dependent Hardness of Transparent Magnesium Aluminate Spinel: Grain Size-Dependent Hardness of Transparent Magnesium Aluminate Spinel journal September 2011
Crystal structure and photoluminescence of Mn2+–Mg2+ codoped gamma aluminum oxynitride (γ-AlON): A promising green phosphor for white light-emitting diodes journal May 2008
Effect of Heating Rate on Densification and Grain Growth During Spark Plasma Sintering of 93W-5.6Ni-1.4Fe Heavy Alloys journal May 2013
Theory of sintering: from discrete to continuum journal June 1998
Effect of electric current on densification behavior of conductive ceramic powders consolidated by spark plasma sintering journal February 2018
Fundamental Aspects of Spark Plasma Sintering: I. Experimental Analysis of Scalability journal May 2012
Spark Plasma Sintering of Alumina journal August 2002
Highly transparent AlON sintered from powder synthesized by direct nitridation journal April 2015
Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics journal June 2016
Highly infrared transparent spark plasma sintered AlON ceramics journal April 2017
Deformation enhanced grain growth in a superplastic Sn-1% Bi alloy journal September 1973
Aqueous Slip Casting of Transparent Aluminum Oxynitride journal June 2016
Consolidation/synthesis of materials by electric current activated/assisted sintering journal February 2009
Spark-plasma-sintering and finite element method: From the identification of the sintering parameters of a submicronic α-alumina powder to the development of complex shapes journal January 2016
Synthesis, microstructures and properties of γ-aluminum oxynitride journal February 2003
Effect of Rapid Heating on Densification and Grain Growth in Hot Pressed Alumina. journal January 2000
Spark plasma sintering behavior of AlON ceramics doped with different concentrations of Y2O3 journal July 2015
Densification of alumina by SPS and HP: A comparative study journal July 2012

Similar Records

Spark plasma sintering of structure-tailored ultrahigh-temperature components: First step to complex net shaping
Journal Article · Wed May 09 00:00:00 EDT 2018 · Journal of the American Ceramic Society · OSTI ID:1611089

Flash sintering of a three‐phase alumina, spinel, and yttria‐stabilized zirconia composite
Journal Article · Sun Apr 09 00:00:00 EDT 2017 · Journal of the American Ceramic Society · OSTI ID:1611089

α‐Alumina and spinel react into single‐phase high‐alumina spinel in <3 seconds during flash sintering
Journal Article · Thu Jul 26 00:00:00 EDT 2018 · Journal of the American Ceramic Society · OSTI ID:1611089