show that the interlayer bonding is fine and the gradient transition in the composition and the microstructure is realized. The gradient material consists of six composite layers and the total thickness is 1.5 mm. In the Ti+SiC transition layers, Ti and SiC react to produce TiC and Ti 5 Si 3 , and some Ti-rich phases are retained in the layers. In the ceramic composite layers, Ti, Si and C react to form Ti 5 Si 3 , TiC and Ti 3 SiC 2 . The microhardness gradually increases from the matrix, to the Ti connecting layer, the Ti+SiC transition layer and to the ceramic composite layer. The maximum value is 1 341 HV. The ternary Ti 3 SiC 2 in the outermost layer exhibits the evidently lower microhardness than TiC and Ti 5 Si 3 , which leads to a slight decrease in the microhardness of the composite layer. The fabricated gradient materials should exhibit superior heat-resistance due to the presence of refractory TiC, Ti 5 Si 3 and Ti 3 SiC 2 .
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