摘要
采用放电等离子烧结工艺,以Ti,Al,B4C,TiC为原料制备Ti3AlC2/TiB2复合材料。通过X射线衍射分析了从600℃到1300℃ Ti3AlC2/TiB2系统反应过程的相形成规律。用扫描电镜观察了不同温度下试样的显微组织演变。结果表明,在900℃之前,主要的反应是Ti和Al反应生成Ti-Al金属间化合物,900℃之后,Ti-Al金属间化合物与TiC逐渐生成Ti3AlC2和TiB2相,形成致密Ti3AlC2/TiB2复合材料。
Ti3AlC2/TiB2 composites were prepared by in-situ spark plasma sintering of Ti, Al, B4C and TiC powders mixtures. The phase formation criterion of reaction course for Ti3AlC2/TiB2 sintered at different temperature of 600 ℃-900℃ was analyzed by X-ray diffraction (XRD), and the microstructure evolution was observed by scanning electron microscopy (SEM). The results show that the reaction procedure of Ti3AlC2/TiB2 could be divided into two stages: Below 900℃, Ti reacts with Al to form Ti-Al intermetallics, above 900 ℃, Ti-Al intermetallics reacts with TiC to produce compact Ti3AlC2 and TiB2.
出处
《稀有金属快报》
CSCD
2008年第7期17-21,共5页
Rare Metals Letters
基金
国家自然科学基金(50572080)
博士启动基金(471-38650142)资助