Pressureless sintering of titanium aluminum carbide (Ti(3)AlC(2)) is difficult due to its easy decomposability at high temperatures, thus decomposition must be avoided during sintering. In this work, pressureless sintering was performed in different embedded powders and Al(4)C(3) was found to be effective to inhibit Ti(3)AlC(2) from decomposition due to the offering of Al rich ambience. High-density Ti(3)AlC(2) was obtained by pressureless sintering in Al(4)C(3) powder bed without additives. The good sinterability is due to the special crystal structure of Ti(3)AlC(2) and the easy diffusion of Al atoms. The mechanical properties of pressureless sintered Ti(3)AlC(2) are comparable to those of the hot-pressed ones.
部门归属
[lu, xinpo; zhou, yanchun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [lu, xinpo] chinese acad sci, grad sch, beijing 100039, peoples r china.;lu, xp (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;yczhou@imr.ac.cn
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