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“MAGNESIUM BULK METALLIC GLASSES SYNTHESIZED BY SPRAY FORMING”学术报告

 

国家重点实验室学术讲座

SKL-AMM Seminar

 

题目/TitleMagnesium Bulk Metallic Glasses Synthesized by Spray Forming

报告人/SpeakerChi Y. A. Tsao

报告人工作单位/AffiliationDepartment of Materials Science and Engineering, and Frontier Material and Micro/Nano Science and Technology Center, National Cheng Kung University

日期/Date2010921 周二   September 21 , 2010Tuesday

时间/Time10:00 ? 11:00 am

联系人/Contact杨滨 教授, Prof. Bin Yang

报告地点/Location:北京科技大学主楼 353,  353 Main Building, USTB

 

Chi Y. A. Tsao

Distinguished Professor, Department of Materials Science and Engineering, National Cheng Kung University, Tainan, TAIWAN. He got his Ph D at Materials Science and Engineering, Massachusetts Institute of Technology, U.S.A in 1990, MS degree at Metallurgical Engineering, University of Missouri-Rolla, U.S.A in 1982, and BS degree at National Cheng Kung University, Metallurgy and Materials Engineering, Taiwan in 1978. His research interests include Electronic Metals, Nano Metals, Bulk Metallic Glasses, Light Metals, Foamed Metals, Metal Powder Making and Consolidation, Metal/Ceramic Composites, Alloy Development, Workability, Mechanical Properties, Spray Forming, Semi-Solid Processing.

 

Abstract

A layered composite plate of Mg?Cu?Gd was produced by spray forming with dimensions of 300mm in diameter and 12mm in maximum thickness, with a Gaussian distribution and a weight of 510 g. The deposit comprised of a nearly complete glassy structure at the bottom, glassy/crystalline structure in the middle (up to 6mm from substrate), and a completely crystallized structure at the deposit top. The porosity of the spray-formed Mg?Cu?Gd layered composite plate varied from the near substrate interface to the near free surface. The chemical composition of the spray-formed Mg?Cu?Gd layered composite plate varied from near the substrate to near free surface, with increasing Cu +Gd concentration towards the substrate because segregation during melting. The glass forming ability of the spray-formed Mg?Cu?Gd layered composite plate was studied. The hardness of the spray-formed Mg?Cu?Gd layered composite plate varied due to variations in the local microstructures and phases, and porosity.