A connection between the structural alpha-relaxation and the beta-relaxation found in bulk metallic glass-formers

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	A connection between the structural alpha-relaxation and the beta-relaxation found in bulk metallic glass-formers
	Ngai, KL ; Wang, Z ; Gao, XQ ; Yu, HB ; Wang, WH
刊名	JOURNAL OF CHEMICAL PHYSICS
	2013
卷号	139 期号:1
ISSN号	0021-9606
通讯作者	Ngai, KL (reprint author), Univ Pisa, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy.
中文摘要	New metallic glasses containing La or Ce have been introduced having dynamic properties bordering on two extremes of conventional metallic glasses. This provides opportunity to test if the trends or correlations established before in molecular and polymeric glass-formers also exist in the broader family of metallic glasses. Due to the drastically different chemical and physical structures of metallic glass-formers than soft matter, there is no guarantee that any correlation found in the latter will hold in the former. If the trends and correlations are found, the result brings metallic glasses closer to the much wider classes of glass-formers in the similarity of properties. In non-metallic glass-formers, a general and fundamental connection has been established between the non-exponentiality parameter of the structural alpha-relaxation and the separation between its relaxation time tau(alpha) and the beta-relaxation time tau(beta). In this paper, we explore the experimental data of metallic glass-formers and show the correlation applies. An explanation of this correlation is given by the Coupling Model. The establishment of the correlation may facilitate the understanding of the roles played by the beta-relaxation in macroscopic properties of metallic glasses including the relations to shear transformation zone, ductile-brittle transition in deformation, crystallization, and diffusion. (C) 2013 AIP Publishing LLC.
资助信息	National Science Foundation of China (NSFC) [51271195, 11274353]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/56713]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ngai, KL,Wang, Z,Gao, XQ,et al. A connection between the structural alpha-relaxation and the beta-relaxation found in bulk metallic glass-formers[J]. JOURNAL OF CHEMICAL PHYSICS,2013,139(1).
APA	Ngai, KL,Wang, Z,Gao, XQ,Yu, HB,&Wang, WH.(2013).A connection between the structural alpha-relaxation and the beta-relaxation found in bulk metallic glass-formers.JOURNAL OF CHEMICAL PHYSICS,139(1).
MLA	Ngai, KL,et al."A connection between the structural alpha-relaxation and the beta-relaxation found in bulk metallic glass-formers".JOURNAL OF CHEMICAL PHYSICS 139.1(2013).