Fabrication of Ti2AlC/TiAl Composites with the Addition of Niobium by Spark Plasma Sintering

摘要：

　　Ti2AlC/TiAl composites with the addition of niobium were prepared by spark plasma sintering using titanium,aluminum,niobium elemental powers and TiC particles as reactants.The experimental and analytical studies on this kind of material concentrated on the relationship between reinforcement phase and mechanical properties.The Ti2AlC/TiAl composites with 5% niobium exhibit high mechanical properties.The three-point bending strength and fracture toughness reaches as high as 915MPa and 23 MPa,m1/2,respectively.It is found that the in-situ reaction occurs at 1100℃ with the addition of niobium at the interface between the TiAl matrix and original reinforcement TiC.Further XRD results indicate that the difference in the reinforcement phase from TiC to Ti2AlC is one of the most important origins to the variation in mechanical properties.

关键词： Ti2AlC/TiAl composite Mechanical properties Niobium addition In-situ reaction

作者: Y.L Yue H.T Wu

作者单位: School of Materials Science and Engineering,University of Jinan,Jinan 250022,China School of Electronic Information Engineering,Tianjin University,Tianjin 300072,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1004-1006

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）