Thermodynamics of in-situ formation of Mg2Si and MgO in AZ91D /Flyash composites

摘要：

Novel AZ91D Mg alloy/fly-ash cenospheres (AZ91D/FAC) composites were fabricated by melt stir technique. The thermodynamic analyses of the interfacial reactions, the microstructure observation, and the phase analyses of the AZ91D/FAC composites were investigated. The results showed that the cenospheres were almost filled with Mg alloy matrix. In-situ MgO and Mg2Si phases were formed in Mg alloy matrix and near the interfaces between the cenospheres and Mg alloy matrix. Through the thermodynamic calculation, it can be found that the standard free enthalpy changes of these interfacial reactions are all negative at the temperature of Mg alloy melt preparation in this work, and these reactions can occur.

关键词： Composite materials Microstructure Thermodynamics Interfacial reaction

作者: Si Rong Yu Zhi Qiu Huang Jia An Liu

作者单位: Key Laboratory of Automobile Materials(Jilin University), Ministry of Education, and College ofMater Key Laboratory of Automobile Materials(Jilin University), Ministry of Education, and College ofMater Key Laboratory of Automobile Materials(Jilin University), Ministry of Education, and College of Mate

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 378-381

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）