MODIFICATION OF Mg2Si MORPHOLOGY IN A Mg-3Si-3Sn ALLOY DURING ISOTHERMAL HEAT TREATMENT

摘要：

The effects of different isothermal holding temperatures and times on the morphology of Chinese script shaped or fibriform eutectic Mg2Si phases in a Mg-3Si-3Sn alloy were investigated during isothermal heat treatment. With increasing heat treatment temperature, the spheroidizing time for the coarse eutectic Mg2Si phases is reduced dramatically. After isothermal heat treatment of 2 h at 550℃, the morphology of the eutectic Mg2Si transforms completely from the coarse Chinese script type and fibriform shape into fine, spherical shape with the lowest interface energies. The spheroidizing mechanism of the Chinese script shaped or fibriform eutectic Mg2Si particles seems to be attributed to the Rayleigh shape instability.

关键词： Mg-3Si-3Sn alloy isothermal heat treatment Mg2Si spheroidizing

作者: LIU XIAO XINLIN LI XiANG WANG GUO RUI MA DAN FENG

作者单位: Centre for Biomedical Materials and Engineering, College of Materials Science and Chemical Engineeri Centre for Biomedical Materials and Engineering, Department of Materials Science and Chemical Engine

会议类型: 国际会议

会议名称: 第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)

会议地点: 哈尔滨

会议语种:英文

页码: 849-854

在线出版日期: 2008-09-03（万方平台首次上网日期，不代表论文的发表时间）