可加工陶瓷Ti3SiC2的合成和性能

以熔盐法自制Cr₂AlC粉末为原料，加入质量分数为5%的Al和质量分数10%的Cu作为黏接剂，采用真空-热压烧结技术制备Cr₂AlC陶瓷基复合材料，通过SEM、OLYMPUS和HVS-100等方法研究热压工艺、黏接剂、退火工艺对Cr₂AlC基陶瓷复合材料组织和性能的影响。结果表明：在Cr₂AlC里加入质量分数为5%的Al，在800 ℃保温2 min制备的Cr₂AlC基陶瓷复合材料密度4.458 g/cm³，硬度718.3 HV, 电阻率0.042 Ω·m；在Cr₂AlC里加入质量分数为10%的Cu，在900 ℃保温2 min制备的Cr₂AlC基陶瓷复合材料的密度5.188 g/cm³，硬度1 131 HV，电阻率0.019 Ω·m。随着烧结温度的升高，复合材料的综合性能更好。

The Ternary Systems:Cr-Al-C,V-Al-C and Ti-Al-C and the Behavior of the H-Phases(M2AlC)

Cr₂AlC ceramic matrix composites was prepared with vacuum-hot pressing sintering technology, Which was based on homemade Cr₂AlC powders as the raw material with the molten salt method and joining 5% Al and 10% Cu as adhesives. Through the method of SEM, OLYMPUS and HVS-1000 etc, this paper investigated impacts of the hot-pressing process, bonding agent and annealing process on the microstructure and mechanical properties of the Cr₂AlC ceramic composite materials. The results show that: The Cr₂AlC ceramic composite material has density of 4.458 g/cm³ and 718.3 HV hardness, resistance 0.042Ω·m with joining 5%wtAl in Cr₂AlC, which heated preservation 2 min in the 800 ℃.And it has density of 5.188 g/cm³ and 1131 HV hardness, resistance 0.019Ω·m with joining 10% Cu in Cr₂AlC which heated preservation 2 min in the 900 ℃. The comprehensive performance of Cr₂AlC ceramic composite material gets better with extension of the sintering temperature.