Microstructures and tribological properties of laser cladded Ti-based metallic glass composite coatings
Microstructures and tribological properties of laser cladded Ti-based metallic glass composite coatings
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激光熔覆钛基金属玻璃复合涂层的微观结构和摩擦学性能
DOI：
10.1016/j.matchar.2016.08.026
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发表时间：
2016-10-01
影响因子：
4.7
通讯作者：
Hu, Te
中科院分区：
文献类型：
--
作者：
Lan, Xiaodong;Wu, Hong;Hu, Te
金属玻璃复合涂层Ti45 Cu 41 Ni 9 Zr 5和Ti45 Cu 41 Ni 6 Zr 5Sn 3（at.%）在Ti-30 Nb-5 Ta-72 r上（重量%）采用激光熔覆技术制备了TNTZ合金。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对涂层的微观结构进行了表征。结果表明，涂层为非晶结构，夹杂着少量的纳米晶相和枝晶。Sn部分取代Ni可提高Ti基非晶合金的玻璃形成能力，并在激光循环加热过程中诱导形成纳米尺寸的Ni 2SnTi相。研究了基体和涂层的摩擦学性能。锡的加入显著提高了镀层的硬度和耐磨性。讨论了涂层的显微组织与耐磨性的关系。(C)2016 Elsevier Inc. All rights reserved.
Metallic glass composite coatings Ti45Cu41Ni9Zr5 and Ti45Cu41Ni6Zr5Sn3 (at.%) on a Ti-30Nb-5Ta-72r (wt.%) (TNTZ) alloy were prepared by laser cladding. The microstructures of the coatings were characterized by means of X-ray diffractometry (XRD), scanning electron microscopy (SEM) equipped with energy dispersive X-ray analyzer (EDXA), and transmission electron microscopy (TEM). Results indicated that the coatings have an amorphous structure embedded with a few nanocrystalline phases and dendrites. A partial substitution of Ni by Sn can improve the glass forming ability of Ti-base metallic glass system, and induce the formation of nano-sized Ni2SnTi phase during the cyclic laser heating. The tribological behavior of both the substrate and the coatings was investigated in detail. A significant improvement in both the hardness and the wear resistance of the coatings was achieved with the addition of Sn. The relationship between the wear resistance and the microstructures of the coatings was discussed. (C) 2016 Elsevier Inc. All rights reserved.