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Vol.50, No.9, 677 ~ 685, 2012
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| Title |
| Effects of Processing Parameters on the Fabrication of in-situ Al/TiC Composites by Thermally Activated Combustion Reaction Process in an Aluminium Melt using Al-TiO2-C Powder Mixtures |
| 김화정 Hwa Jung Kim , 이정무 Jung Moo Lee , 조영희 Young Hee Cho , 김종진 Jong Jin Kim , 김수현 Su Hyeon Kim , 이재철 Jae Chul Lee |
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| Abstract |
| A feasible way to fabricate in-situ Al/TiC composites was investigated. An elemental mixture of Al-TiO2-C pellet was directly added into an Al melt at 800-920℃ to form TiC by self-combustion reaction. The addition of CuO initiates the self-combustion reaction to form TiC in 1-2 ㎛at the melt temperature above 850℃. Besides the CuO addition, a diluent element of excess Al plays a significant role in the TiC formation by forming a precursor phase, Al3Ti. Processing parameters such as CuO content, the amount of excess Al and the melt temperature, have affected the combustion reaction and formation of TiC, and their influences on the microstructures of in-situ Al/TiC composites are examined. |
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| Key Words |
| composites, self-propagating synthesis, casting, X-ray diffraction, TiC |
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