Ti_2AlC/TiB_2/TiC复相陶瓷的制备及性能研究

Synthesis and Properties of Ti_2AlC/TiB_2/TiC Multiphase Ceramic

采用SHS法合成了Ti_2Al C、TiB_2、TiC三相复合陶瓷粉体;应用SPS技术制备了Ti_2AlC/TiB_2/TiC块体复相陶瓷材料;采用XRD、SEM和EDS等手段对复相材料的相组成、微观形貌进行了分析。研究结果表明:在所制备的复相块体陶瓷中,Ti2Al C为基体相,TiB_2和TiC弥散分布于基体相中;复相块体陶瓷具有高的致密度,为99.6%;显微硬度平均为12.96 GPa;断裂韧性为45.28 MPa·m^(1/2),这为下一步研究其可加工性提供了实验依据。

The three-phase ceramic powders of Ti2AlC,TiB2 and TiC are synthesized by self-propagating hightemperature synthesis（ SHS） technology. Ti2AlC/TiB2/ TiC block multiphase ceramics are prepared by spark plasma sintering（ SPS） method. The results show that Ti2AlC is the matrix phase,and TiB2,TiC are dispersed on the matrix. The high density of Ti2AlC / TiB2/ TiC block multiphase ceramic is 99. 6%,the average microhardness value is12. 96 GPa,the fracture toughness value is 45. 28 MPa·m^1/2.