摘要
给出了以ＴｉＨ２和Ｂ４Ｃ为原料通过过渡塑性相工艺（ｔｒａｎｓｉｅｎｔｐｌａｓｔｉｃｐｈａｓｅｐｒｏｃｅｓｓｉｎｇ）制备Ｔｉ－Ｂ－Ｃ复合陶瓷材料的方法。同时进行了ＴｉＨ２－Ｂ４Ｃ体系和Ｔｉ－Ｂ４Ｃ体系的对比实验，结果表明，ＴｉＨ２在８００℃以下分解获得高性能的Ｔｉ粉和Ｂ４Ｃ发生了如下反应：（３＋ｘ）Ｔｉ＋Ｂ４Ｃ→２ＴｉＢ２＋（１＋ｘ）ＴｉＣ１１＋ｘ（０≤ｘ≤１）。在相同条件下以ＴｉＨ２作为过渡塑性相的ＴｉＨ２－Ｂ４Ｃ体系比Ｔｉ－Ｂ４Ｃ体系具有优越的烧结性能，在１６００℃时热压烧结４ｈ可以获得高性能的ＴｉＢ２－ＴｉＣｘ复合陶瓷材料（断裂韧性为７．７ＧＰａｍ１／２，抗弯强度为７６５ＭＰａ）。还利用Ｘ衍射和扫描电镜对这种材料的显微结构进行了研究。
TiH 2 and B 4C were used as raw materials to produce Ti B C composite ceramics through the processing called transient plastic phase process (TPPP). At the same time TiH 2 B 4C system was compared with Ti B 4C system. The result indicated that high active Ti decomposed by TiH 2 under 800℃ reacted with B 4C completely as follows: (3+ x )Ti+B 4C→2TiB 2+(1+ x )TiC 11+ x (0≤ x ≤1). At the same operation parameter, TiH 2 B 4C system used as transient plastic phase processing has better sintering quality than Ti B 4C system and high performance composite ceramics have been obtained at 1600℃ for 4h (fracture toughness is 7.7MPa·m 1/2 , flexural strength 765MPa). This material's microstructure was studied by X ray diffraction (XRD) and scanning electron microscope (SEM).
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第12期73-75,共3页
Journal of Tsinghua University(Science and Technology)
