Thermoplastic deformation and micro/nano-replication of an Au-based bulk metallic glass in the supercooled liquid region

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Title:	Thermoplastic deformation and micro/nano-replication of an Au-based bulk metallic glass in the supercooled liquid region
Authors:	鄭憲清;Chen, Y.C.;Chu, J.P.;Jang, J.S.C.;Wu, C.W.
Contributors:	工學院材料科學與工程研究所
Keywords:	Amorphous materials;Applied sciences;Bulk metallic glasses;Compressive behavior;Cross-disciplinary physics: materials science;rheology;Deformation;Elasticity. Plasticity;Exact sciences and technology;Formability;Glasses (including metallic glasses);Gold;Homogeneous flow;Liquids;Materials science;Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology;Metals. Metallurgy;Micro/nano-replication;Nanostructure;Physics;Specific materials;Strain rate;Thermoplastic resins
Date:	2012-10-30
Issue Date:	2026-04-23 11:48:28 (UTC+8)
Publisher:	Elsevier BV;Kidlington: Elsevier B.V
Abstract:	摘要： In this paper, we reported the thermoplastic deformation and micro/nano forming ability of a Au49Ag5.5Pd2.3Cu26.9Si16.3 bulk metallic glass (BMG) in the supercooled liquid region (SCLR) at strain rates ranging from 1×10–4 to 3×10–2s−1. It is found that the deformation behavior of Au-based BMG has strong dependences on strain rate and temperature applied. The strain-rate sensitivity value, obtained by the strain-rate change method, approaches an unity (Newtonian flow) at low strain rates of 10–4s−1, but it decreases with increasing strain rate to ∼0.3 (non-Newtonian flow) at 10–2s−1. The homogeneous flow behavior is observed from the compressive test results. As the result of homogeneous flow, the deformability with a high compressive strain of ∼97% is achieved. The excellent micro/nano-patterning obtained at 430K is also demonstrated for imprinted stripes with a feature size of ∼156nm, signifying the good formability of this alloy in SCLR. 出版者： Kidlington: Elsevier B.V 出版日期： 2012-10-30 出處： Materials Science and Engineering: A, 2012-10, Vol.556, p.488-493 版權： 2012 Elsevier B.V. 版權： 2015 INIST-CNRS 識別號： ISSN: 0921-5093 識別號： EISSN: 1873-4936 識別號： DOI: 10.1016/j.msea.2012.07.017
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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