摘要
应用热力学 ,分析了Ti与B2 O3 、Al之间的化学反应原位合成TiB和Al2 O3 增强的钛基复合材料的合成机理。设计了普通的非自耗电弧熔炼工艺制备该钛基复合材料。借助X射线衍射仪 (XRD)和扫描电镜 (SEM )分析了原位合成复合材料的物相和增强体的形态。结果表明 :原位合成的增强体确实为TiB和Al2 O3 。增强体在基体合金上分布较为均匀 ,增强体形状为短纤维状。原位合成增强体的加入显著提高了钛基复合材料的洛氏硬度。
Synthesis mechanism of TiB and Al_2O_3 reinforced titanium matrix composites in situ fabricated by using the chemical reaction between Ti, Al and B_2O_3 was investigated by thermodynamic theory. A common non-consumable arc-melting technology was designed to produce the titanium matrix composites. Phase identification and microstructure observation of the composites were performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that in situ synthesized reinforcements are TiB and Al_2O_3. Reinforcements are distributed uniformly in the matrix alloy. The shapes of reinforcements are short fibrous. The in situ synthesized reinforcements improves the HRC value of the composites obviously.
出处
《铸造》
EI
CAS
CSCD
北大核心
2002年第5期277-279,共3页
Foundry
基金
S国家自然科学基金重点项目 (59631 0 80 )
上海市科委新材料中心项目
