材料科学
微观结构
金属间化合物
共晶体系
涂层
冶金
扫描电子显微镜
陶瓷
合金
铝化钛
复合材料
钛合金
作者
Shi‐Jin Feng,Hao Tang,Shuquan Zhang,Huaming Wang
标识
DOI:10.1016/s1003-6326(11)61371-x
摘要
A wear resistant TiB–TiC reinforced TiNi–Ti2Ni intermetallic matrix composite coating (TiB–TiC/TiNi–Ti2Ni) was prepared on Ti–6.5Al–2Zr–1Mo–1V titanium alloy by the laser cladding process using Ti+Ni+B4C powder blends as the precursor materials. Microstructure and worn surface morphologies of the coating were characterized by optical microscopy (OM), scan electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDS) and atomic force microscopy (AFM). Wear resistance of the coating was evaluated under dry sliding wear test condition at room temperature. The results indicate that the laser clad coating has a unique microstructure composed of flower-like TiB–TiC eutectic ceramics uniformly distributed in the TiNi–Ti2Ni dual-phase intermetallic matrix. The coating exhibits an excellent wear resistance because of combined action of hard TiB–TiC eutectic ceramic reinforcements and ductile TiNi–Ti2Ni dual-phase intermetallic matrix.
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