原位合成TiB/Ti基复合材料增强体的生长机制  

GROWTH MECHANISM OF REINFORCEMENT IN IN SITU PROCESSED TiB/Ti COMPOSITES

作　　者：吕维洁[1] 张小农[1] 张荻[1] 吴人洁[1] 卞玉君[2] 方平伟[2] 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室,上海200030 [2]上海钢铁研究所钛合金分所,上海200940

出　　处：《金属学报》2000年第1期104-108,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金!59631080;上海市新材料中心资助项目

摘　　要：利用 Ｔｉ与 Ｂ之间的自蔓延高温合成反应，经非自耗电弧熔炼工艺制备了 ＴｉＢ增强的钛基复合材料借助 Ｘ射线衍射（ＸＲＤ）、扫描电镜和透射电镜分析了复合材料的物相和增强体的形态．结果表明：只存在ＴｉＢ增强体和α－Ｔｉ原位合成增强体ＴｉＢ的形貌与其Ｂ２７晶体结构密切相关，ＴｉＢ增强体容易沿［０１０］方向生长而长成柱状短纤维其柱面由（１００）；Utilizing the self--propagation high temperature synthesis reaction between titanium and boron, TiB reinforced titanium matrix composites have been produced by non-consumable arc--melting technology. Phase identification and reinforcement morphologies have been performed by X- ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that there only exist two phases in the composites, namely TiB reinforcement and a-Ti matrix phase. Reinforcement morphologies are closely relate to the crystal structure of TiB, TiB reinforcements are liable to grow along [010] direction and become prism--like short--fibre. The prismatic planes of TiB are consisted with facets (100), (101) and (101).

关 键 词：TiB/Ti 复合材料 原位反应 晶体结构 生长机制 

分 类 号：TB333[一般工业技术—材料科学与工程]