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首页> 外文期刊>Journal of Materials Engineering and Performance >Synthesis and Characterization of Ti6Al4V-Nano-ZrO2 Composite Cladding on Ti6Al4V Substrate Using Fiber Laser
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Synthesis and Characterization of Ti6Al4V-Nano-ZrO2 Composite Cladding on Ti6Al4V Substrate Using Fiber Laser

机译：使用光纤激光器对Ti6Al4V-Nano-ZrO2复合覆层的合成与表征

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摘要

The synthesis and characterization of Ti6Al4V-nano-ZrO2 composite coatings on Ti6Al4V substrate using laser cladding method have been carried out. The effect of laser power and scanning speed on the clad layer morphology, microhardness, phase appearance, and tribological behavior of the composite cladding has been investigated. The formation of dendrite microstructure with retention of agglomerated nano-ZrO2 powder and metallic oxides such as TiO2, Al2O3, ZrO2 increases hardness and wear resistance of the cladding surface remarkably. The average microhardness of the cladding surface increased 4 times that of the substrate material. The discontinuous but uniformly dispersed reinforcement of ZrO2 is formed during the melting and solidification process. Cracks and pores and discontinuous phases of ZrO2 are also found in some of the samples. These discontinuous sites can retain lubricant; hence, the tribological behavior of the laser cladding composite coating may improve. This method establishes the reactive in situ formation of hard composite coating (TiO2-Al2O3-ZrO2) with a lower coefficient of friction than the Ti6Al4V using laser irradiation of wavelength 1070 nm.
机译：采用激光熔覆法在Ti6Al4V基体上制备了Ti6Al4V-纳米ZrO2复合涂层，并对其进行了表征。研究了激光功率和扫描速度对复合熔覆层形貌、显微硬度、相外观和摩擦学性能的影响。枝晶显微结构的形成，以及团聚的纳米ZrO2粉末和TiO2、Al2O3、ZrO2等金属氧化物的保留，显著提高了熔覆表面的硬度和耐磨性。镀层表面的平均显微硬度是基体材料的4倍。ZrO2在熔化和凝固过程中形成不连续但均匀分散的增强体。在一些样品中还发现了ZrO2的裂纹、孔隙和不连续相。这些不连续的部位可以保留润滑剂；因此，激光熔覆复合涂层的摩擦学性能可能会得到改善。该方法通过1070 nm波长的激光照射，实现了硬质复合涂层（TiO2-Al2O3-ZrO2）的反应原位形成，其摩擦系数低于Ti6Al4V。

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