Influence of Cr2O3 addition on the properties of TiAl composites

摘要：

　　Using Ti,Al and Cr2O3 as starting materials,Al2O3 particulate reinforced TiAl composites have been fabricated by in-situ reaction synthesis method.Effects of the Cr2O3 addition on the microstructures and mechanical properties of the TiAl/Al2O3 composites were investigated in detail.The results show that the composites have a matrix of TiAl,Ti3Al,and minor Cr containing phases,and a second reinforcement Al2O3.The addition of Cr2O3 effectively refined the structure of the matrix,and as a result,the mechanical properties of TiAl composites are improved.At Cr2O3 7.36 wt%,the flexural strength and fracture toughness reach the maximum values of 634.62 MPa and 9.79 MPa·m1/2,which are increased by 80% and 30%,respectively.The strengthening mechanism is also discussed.

关键词： TiAl Al2O3 Cr2O3 composites

作者: Jianfeng Zhu Wenwen Yang Fangni Du

作者单位: Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education,Shaanxi University of Science and Technology, Xian 710021, China

会议类型: 国际会议

会议名称: the 2011 International Conference on Frontiers of Manufacturing Science and Measuring Technology (第一届制造科学与检测技术国际会议(ICFMM2011))

会议地点: 重庆

会议语种:英文

页码: 789-792

在线出版日期: 2011-06-23（万方平台首次上网日期，不代表论文的发表时间）