Paper number 223


Makoto KOBASHI and Takao CHOH

Department of Materials Processing Engineering, School of Engineering, Nagoya University,
Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan

Summary The spontaneous infiltration of the powder blend consisting of titanium and carbon with molten aluminum was investigated. The molten aluminum infiltrated into the [Ti + C] powder blend spontaneously, whereas the TiC powder phase was not infiltrated under the same experimental condition. Addition of aluminum powder in the [Ti + C] powder blend shortened the processing time and lowered the processing temperature to a large extent. The differental thermal analysis revealed that the aluminum powder in the powder blend melted at 933K and then ignited the reaction between titanium and carbon. The TiC formed in situ had a three-dimensionally continuous morphology. The optimum additional amount of aluminum in the powder blend was estimated to be in the range of 0.8-1.0 (Al/Ti molar ratio).
Keywords aluminum matrix composite, infiltration, combustion reaction, titanium carbide.

Theme : Metal Matrix Composites ; Processing and Forming

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