热压烧结添加MoS2的Ti3SiC2复合陶瓷及性能

利用热压烧结工艺（Hot—Pressing Sintering HP）制备不同MoS2质量含量的Ti3SiC2复合陶瓷，并研究其性能。研究表明，在烧结温度为1400℃，30MPa压力，保温60min的条件下，Ti3SiC2复合陶瓷烧结体的相对密度达99％以上。在Ti3SiC2中添加MoS2能大幅提高材料的性能，当MoS2含量为4州％时，Ti3SiC2复合陶瓷的显微硬度达到7．83GPa，同时它的电导率达到10．05×10^6S·m^-1。在载荷为38N和转速为400r／min下，Ti3SiC2复合陶瓷在干摩擦和油润滑两种摩擦条件下的摩擦系数分别为0．176～0．283和0．062～0．134，并且试样的磨损率分别为2．657×10^-6mm^3·N^-1·m^-1和1．968×10^-7mm^3·N^-1·m^-1，比单相Ti3SiC2陶瓷的磨损率（9．9×10^-5mm^3·N^-1·in^-1）小。

Preparation and Performance of Ti3SiC2 Multiphase Ceramics with MoS2 by Hot Pressing

Abstract： Ti3SiC2 composite ceramic with different content of MoS2 in mass were prepared by hot-pressing sintering, and the performance of Ti3SiC2 composite ceramic were investigated. The results indicated that the bulk Ti3SiC2 composite ceramic with a relative density of 99% was fabricated by HP under 30 MPa and at 1400 ℃ for 60 min. The Vickers hardness, the electric conductivity and the tribological property of Zi3SiC2 composite ceramic are greatly enhanced with the addition of MoS2. The Vickers hardness and electric conductivity of Ti3SiC2 composite ceramic with 4w%MoS2 are 7.83 GPa and 10.05×10^6 S·m^-1, respectively. The tribological tests were carried out at pressure load of 38N as well as sliding speed of 400r/min was selected. The friction coefficient of Ti3SiC2 composite ceramics is about 0.176-0.283 without lubricant, but it is 0.062-0.134 with lubricant. And the wear rate of TiaSiC2 composite ceramics is of only about 2.657×10^-6 mm^3·N^-1·m^-1 and 1.968×10^-7mm^3·N^-1·m^-1, which are smaller than that of single-phase Ti3SiC2.