【摘 要】
：
TiAl/Ti_2AlC composites were prepared by in-situ hot pressing of Ti/Al/C powders mixtures and sintered at different temperatures were investigated by X-ray diff
【机 构】
：
State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Tec
【出 处】
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Journal of Wuhan University of Technology(Materials Science
论文部分内容阅读
TiAl/Ti_2AlC composites were prepared by in-situ hot pressing of Ti/Al/C powders mixtures and sintered at different temperatures were investigated by X-ray diffraction (XRD) of samples. The reaction procedure of Ti-Al-C system could be divided into three stages. Below 900 ℃, Ti reacts with Al to form TiAl intermetallics; above 900 ℃, C reacts with remain Ti to form TiC triggered by the exothermal reaction of Ti and Al; TiAl reacts with TiC to produce dense TiAl/Ti_2AlC composites. In the holding stage, ternary Ti_2AlC develops to layered polycrystal and composites pyknosis in the meanwhile. The mechanism of synthesis and microstructure was especially discussed.
TiAl / Ti_2AlC composites were prepared by in-situ hot pressing of Ti / Al / C powders mixtures and sintered at different temperatures were investigated by X-ray diffraction (XRD) of samples. The reaction procedure of Ti-Al-C system could be Below 900 ° C, Ti reacts with Al to form TiAl intermetallics; above 900 ° C, Reacts with remain Ti to form TiC triggered by the exothermal reaction of Ti and Al; TiAl reacts with TiC to produce dense TiAl / Ti_2AlC The mechanism of synthesis and microstructure was especially discussed.
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