Correlation between medium-range order structure and glass-forming ability for Al-based metallic glasses

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	Correlation between medium-range order structure and glass-forming ability for Al-based metallic glasses
	N. C. Wu; M. Yan; L. Zuo; J. Q. Wang
	2014
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	115 期号:4
摘要	To clarify the correlation of medium-range order (MRO) structure with glass forming ability (GFA) of Al-based metallic glasses, Al86Ni14-aYa (a = 2 similar to 9 at. %) metallic glasses were analyzed by x-ray diffraction in detail and further verified by synchrotron high-energy x-ray diffraction. The prepeak that reflects the MRO structural evolution was found to be much sensitive to alloy composition. We have proposed an icosahedral supercluster MRO structure model in Al-TM (transition metal)-RE (rare earth metal) system, which consists of 12 RE(TM)-centered clusters on the vertex of icosahedral supercluster, one RE(TM)-centered clusters in the center, and TM(RE) atoms located at RE(TM)-centered cluster tetrahedral interstices in the icosahedral supercluster. It was indicated that the MRO structural stability mainly depends on the interaction of efficient dense packing and electrochemical potential equalization principle. The Al86Ni9Y(La)(5) alloys present good GFA due to the combination of the two structural factors. (C) 2014 AIP Publishing LLC.
部门归属	[wu, n. c. ; zuo, l.] northeastern univ, coll mat & met, shenyang 110004, peoples r china. [wu, n. c. ; wang, j. q.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. [yan, m.] univ queensland, sch mech & min engn, queensland ctr adv mat proc & mfg ampam, brisbane, qld, australia. ; wang, jq (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china. ; jqwang@imr.ac.cn
关键词	Local Atomic Order X-ray-diffraction Thermal-stability Alloys Packing Liquid Aluminum Clusters Model Xafs
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72590
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	N. C. Wu,M. Yan,L. Zuo,et al. Correlation between medium-range order structure and glass-forming ability for Al-based metallic glasses[J]. Journal of Applied Physics,2014,115(4).
APA	N. C. Wu,M. Yan,L. Zuo,&J. Q. Wang.(2014).Correlation between medium-range order structure and glass-forming ability for Al-based metallic glasses.Journal of Applied Physics,115(4).
MLA	N. C. Wu,et al."Correlation between medium-range order structure and glass-forming ability for Al-based metallic glasses".Journal of Applied Physics 115.4(2014).