Improvement of Plasticity of Bulk Metallic Glasses by Addition of a Crystalline Phase:Manufacturing of CuZrAl Composites by Spark Plasma Sintering
At room temperature the majority of bulk metallic glasses present no plasticity.This constitutes a major drawback for applications in the mechanical field.To overcome this disadvantage,metallic glass matrix composites(MGMCs)composed of(a)soft crystalline phase(s)and a glassy matrix have been developed.In this study,MGMCs are produced by mixing a metallic glass powder(Cu-based)and a crystalline powder(Zr or Ta)in a planetary ball mill and then by densification of the mixture by Spark Plasma Sintering(SPS).The following main parameters are investigated(1)the chemical composition,(2)the volume fraction and(3)the size of the crystalline phase.Addition of a second phase induces a decrease in hardness,an increase or a decrease in Young modulus(depending on the added particles),a decrease in the stress to fracture but a very significant increase in plasticity.Observation of fracture surfaces evidences the positive effect of the second phase.SPS is an attractive route to manufacture metallic glass matrix composites with controlled microstructure and good plasticity.
Cardinal S. Pelletier J.M. Mercier F. Dalmas F. Xie G.Q.
Université de Lyon,MATEIS,UMR CNRS5510,Bat.B.Pascal,INSA-Lyon,F-69621 Villeurbanne cedex,France Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China
国际会议
北京
英文
348-354
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）