Reactive synthesis for porous Ti3AlC2 ceramics through TiH2, Al and graphite powders |
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Authors: | Junsheng Yang Cuijiao LiaoJiefeng Wang Yao JiangYuehui He |
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Affiliation: | State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China |
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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. |
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Keywords: | A. Solid state reaction A. Sintering B. Porosity D. Carbides Pore forming Mechanism |
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