自蔓延高温合成Ti3AlC2材料及其摩擦磨损性能

以TiC，Ti，Al，C粉末为反应物原料，采用自蔓延高温反应按照质量分数为15% TiC，50% Ti，28% Al，7% C的配比合成了纯度为96.76%、气孔率为9.45%的高纯Ti3AlC2块体材料。研究添加TiC对合成产物Ti3AlC2材料纯度的影响，并对其摩擦磨损性能进行分析。结果表明：当添加TiC的质量分数小于15%，Ti3AlC2含量随TiC含量的增加而增加；当添加TiC质量分数大于15%，Ti3AlC2含量随TiC含量的增加而降低。当载荷较小，Ti3AlC2材料以磨粒磨损为主；而载荷较大，其以磨粒磨损为主并伴随有轻微黏着磨损。

Fabrication of Ti3AlC2 by self-propagating high-temperature synthesis and its friction and wear behavior

High purity Ti3AlC2 was synthesized by self propagating high temperature synthesis method using TiC,Ti,Al and C powders as raw materials. Ti3AlC2material with high density was successfully fabricated when the mass fraction of TiC/Ti/Al/C is equal to 15%/50%/28%/7%. The content of Ti3AlC2in the material reaches ashigh as 96.76%,and the porosity is only 9.45%. The effects of TiC on the purity of sintered Ti3AlC2 were studied. When the addition content of TiC is less than 15%,Ti3AlC2 percentage content firstly increases with the increase of TiC content,but when the addition content of TiC is greater than 15%,it will decrease with continuously increasing amount of TiC. When the load is low,the main wear mechanism is abrasive wear. Under a higher load,the wear mechanism transforms to abrasive wear and light adhesive wear.