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

Title: Medium-range structure and glass forming ability in Zr–Cu–Al bulk metallic glasses

Journal Article · · Acta Materialia

Fluctuation electron microscopy experiments combined with hybrid reverse Monte Carlo modeling show a correlation between medium-range structure at the nanometer scale and glass forming ability in two Zr–Cu–Al bulk metallic glass (BMG) alloys. Both Zr50Cu35Al15 and Zr50Cu45Al5 exhibit two nanoscale structure types, one icosahedral and the other more crystal-like. In Zr50Cu35Al15, the poorer glass former, the crystal-like structure is more stable under annealing below the glass transition temperature, Tg, than in Zr50Cu45Al5. Variable resolution fluctuation microscopy of the MRO clusters show that in Zr50Cu35Al15 on sub-Tg annealing, the crystal-like clusters shrink even as they grow more ordered, while icosahedral-like clusters grow. Furthermore, the results suggest that achieving better glass forming ability in this alloy system may depend more on destabilizing crystal-like structures than enhancing non-crystalline structures.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
DMR1205899; CMMI1232731; DMR1121288; AC02-07CH11358
OSTI ID:
1254301
Alternate ID(s):
OSTI ID: 1357658
Report Number(s):
IS-J-8990; PII: S1359645416300799
Journal Information:
Acta Materialia, Vol. 109, Issue C; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 58 works
Citation information provided by
Web of Science

References (49)

Microstructure Controlled Shear Band Pattern Formation and Enhanced Plasticity of Bulk Metallic Glasses Containing in situ Formed Ductile Phase Dendrite Dispersions journal March 2000
Study of mechanical deformation in bulk metallic glass through instrumented indentation journal October 2001
Microstructure and mechanical properties of as-cast Zr52.5Cu17.9Ni14.6 Al10Ti5 bulky glass alloy journal November 2000
Bulk Metallic Glass Nanowire Architecture for Electrochemical Applications journal March 2011
Under what conditions can a glass be formed? journal September 1969
Glass Formation Criterion for Various Glass-Forming Systems journal September 2003
Recent progress in quantifying glass-forming ability of bulk metallic glasses journal May 2007
The atomic structure of aluminum based metallic glasses and universal criterion for glass formation journal October 1996
A structural model for metallic glasses journal September 2004
The density and packing fraction of binary metallic glasses journal May 2013
Atomic size effect on the formability of metallic glasses journal April 1984
Alloying strongly influences the structure, dynamics, and glass forming ability of metallic supercooled liquids journal September 2008
Glass forming ability and short-range order in a binary bulk metallic glass by ab initio molecular dynamics journal September 2008
Atomic packing and short-to-medium-range order in metallic glasses journal January 2006
Relationship between structure, dynamics, and mechanical properties in metallic glass-forming alloys journal July 2008
Structure study of Ni62Nb38 metallic glass using reverse Monte Carlo simulation journal May 1993
Atomic structure in Zr70Ni30 metallic glass journal October 2007
Local structure of amorphous Zr70Pd30 alloy studied by electron diffraction journal July 2001
The influence of efficient atomic packing on the constitution of metallic glasses journal July 2003
Candidate Atomic Cluster Configurations in Metallic Glass Structures journal January 2006
A geometric model for atomic configurations in amorphous Al alloys journal May 2003
Efficient local packing in metallic glasses journal August 2004
Order, frustration, and defects in liquids and glasses journal November 1983
Geometric Frustration of Icosahedron in Metallic Glasses journal July 2013
The Structure and Stability of Atomic Liquids: From Clusters to Bulk journal January 1996
The favored cluster structures of model glass formers journal January 2003
Formation of large-scale icosahedral clusters in a simple liquid approaching the glass transition journal November 2001
Decoupling of Diffusion from Structural Relaxation and Spatial Heterogeneity in a Supercooled Simple Liquid journal October 2002
Role of minor alloying additions in formation of bulk metallic glasses: A Review journal June 2004
The efficient cluster packing model – An atomic structural model for metallic glasses journal September 2006
Nanoscale Structure and Structural Relaxation in Zr 50 Cu 45 Al 5 Bulk Metallic Glass journal May 2012
Multiple maxima of GFA in three adjacent eutectics in Zr–Cu–Al alloy system – A metallographic way to pinpoint the best glass forming alloys journal June 2005
Annealing effect on mechanical constants for Ca48Mg27Cu25 bulk metallic glass journal August 2010
Aluminum nanoscale order in amorphous Al92Sm8 measured by fluctuation electron microscopy journal April 2005
Fluctuation microscopy: a probe of atomic correlations in disordered materials journal January 2000
Variable Resolution Fluctuation Electron Microscopy on Cu-Zr Metallic Glass Using a Wide Range of Coherent STEM Probe Size journal December 2010
Fluctuation microscopy in the STEM journal November 2002
Inelastic and elastic mean free paths from FIB samples of metallic glasses journal January 2013
Atom pair persistence in disordered materials from fluctuation microscopy journal June 2000
Structural analysis of carbonaceous solids using an adapted reverse Monte Carlo algorithm journal January 2003
HRMC: Hybrid Reverse Monte Carlo method with silicon and carbon potentials journal May 2008
HRMC_1.1: Hybrid Reverse Monte Carlo method with silicon and carbon potentials journal February 2011
The Local Structure of Amorphous Silicon journal February 2012
A quantitative measure of medium-range order in amorphous materials from transmission electron micrographs journal July 2003
Ring statistics analysis of topological networks: New approach and application to amorphous GeS2 and SiO2 systems journal June 2010
Experimental and ab initio structural studies of liquid Zr 2 Ni journal March 2009
Local order influences initiation of plastic flow in metallic glass: Effects of alloy composition and sample cooling history journal October 2008
Full icosahedra dominate local order in Cu64Zr34 metallic glass and supercooled liquid journal May 2014
Computational thermodynamics to identify Zr–Ti–Ni–Cu–Al alloys with high glass-forming ability journal June 2006

Cited By (1)

Nanometer-scale gradient atomic packing structure surrounding soft spots in metallic glasses journal July 2018

Figures / Tables (19)