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Reactive synthesis for porous Ti3AlC2 ceramics through TiH2, Al and graphite powders
Authors:Junsheng Yang  Cuijiao LiaoJiefeng Wang  Yao JiangYuehui He
Affiliation:State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China
Abstract:Porous Ti3AlC2 ceramics were fabricated by reactive synthesis. The process of fabrication involved five steps: (i) the pyrolysis of stearic acid at 450 °C; (ii) the decomposition of TiH2 at 700 °C, which leads to the conversion of TiH2 to Ti; (iii) the solid–liquid chemical reaction of solid Ti and molten Al at 800–1000 °C, which converts the mixture to Ti–Al compounds; (iv) the newly synthesized Ti–Al compounds that react with surplus Ti and graphite to form ternary carbides and TiC at 1100–1200 °C; and (v) reactive synthesized ternary carbides and TiC that yield porous Ti3AlC2 at 1300 °C.
Keywords:A. Solid state reaction   A. Sintering   B. Porosity   D. Carbides   Pore forming Mechanism
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