在Ti6A14V合金表面激光熔覆原位合成了TiB2和TiC颗粒增强镍基复合涂层，通过X射线衍射仪、光学显微镜和扫描电镜以及能谱仪研究了添加2％（质量分数）Y2O3对涂层组织的影响。结果表明：未添加Y2O3的涂层由增强相、少量如CrB和基体组织组成；添加Y2O3后，涂层中增强相TiB2的尺寸显著细化且有新相Ni3Y生成，CrB化合物数量减少，涂层与基底形成冶金结合，且界面更平整、致密，成分过渡区有一定程度的缩小。
TiB2 and TiC particles reinforced Ni-based composite coatings were in-situ synthesized by laser cladding on Ti6A14V alloy surface. The effect of adding 2wt% Y2 O3 content on microstructure of the coating was studied by X-ray diffraction, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy. The results show that the coating without Y2O3 consisted of reinforcement phases, a small quantity of CrB and the substrate. After adding Y2 O3, the size of reinforcement phase TiB2 was refined greatly and and a new phase Ni3 Y was found, and the number of CrB compound decreased. A metallurgical bonding was formed between the coating and substrate and the interface became smoother and more compact. The composition transition zone was reduced to a certain extent teeame.
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