Microstructure of Molybdenum and Tungsten Matrix (l—x)Ti₃SiC₂+xSiC Layered Composites Prepared by Spark Plasma Sintering

The molybd enum and tungsten matrix layered composites were prepared by stepwise laying of elemental powders and spark plasma sintering technology, and the microstructure of their interface was analyzed. The results show that the obvious transition layers were built in the interfaces between molybdenum layer and Ti3SiC2 layer, tungsten layer and Ti3SiC2 layer in layered composite after sintering at 1300 ℃, and the interface of the transition layer was straight, clear and tight, and obvious defection had not observed. The thickness of the transiti onlayer between molybdenum layer and Ti3SiC2 layer, tungsten layer and Ti3SiC2 layer were about 80, 50 μm respectively. After sintering at 1300 ℃, compact molybdenum layer was obtained and tungsten layer contained more pores.