Synthesis and characterization of in situ TiC–TiB2 composite coatings by reactive plasma spraying on a magnesium alloy
Synthesis and characterization of in situ TiC–TiB2 composite coatings by reactive plasma spraying on a magnesium alloy
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DOI：
10.1016/j.apsusc.2012.10.177
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发表时间：
2013
影响因子：
6.7
通讯作者：
B. Zou;S. Tao;Wenzhi Huang;Z. Khan;Xizhi Fan;Lijian Gu;Ying Wang;Jiaying Xu;X. Cai;Hongmei Ma;Xueqiang Cao
中科院分区：
文献类型：
--
作者：
B. Zou;S. Tao;Wenzhi Huang;Z. Khan;Xizhi Fan;Lijian Gu;Ying Wang;Jiaying Xu;X. Cai;Hongmei Ma;Xueqiang Cao
采用反应等离子喷涂技术在镁合金表面制备了TiC-TiB 2复合涂层。采用X射线衍射、扫描电镜和销盘磨损试验对涂层的相组成、显微组织和耐磨性进行了表征。结果表明，RPS涂层中生成的产物由TiC和TiB 2组成。借助团聚体颗粒中自蔓延高温合成反应的点燃，RPS涂层呈现出多孔、致密的微观结构。在原料粉末中加入Ni粉后，涂层的孔隙率有所降低。RPS涂层在各种载荷下都为基体提供了良好的耐磨性。对于高负载（例如，当载荷≥ 15 N时，适量Ni的加入可显著提高涂层的耐磨性。
TiC–TiB2composite coatings were successfully synthesized using the technique of reactive plasma spraying (RPS) on a magnesium alloy. Phase composition, microstructure and wear resistance of the coatings were characterized by using X-ray diffraction, scanning electron microscopy and pin-on-disk wear test, respectively. The results showed that the resultant product in the RPS coatings was composed of TiC and TiB2. Depending on the ignition of self-propagating high-temperature synthesis reaction in the agglomerate particles, the RPS coatings displayed porous and dense microstructures. The porosity of the RPS coatings, to some extent, decreased when the feed powders were plasma sprayed with Ni powders. The RPS coatings provided good wear resistance for the substrate under various loads. For high loads (e.g., ≥15N), the wear resistance could be significantly improved by the proper addition of Ni into the RPS coatings.