Surface characterization and preparation of Ta coating on Ti6Al4V alloy

IMR OpenIR

	Surface characterization and preparation of Ta coating on Ti6Al4V alloy
	Yu, Xiaoming; Tan, Lili; Yang, Huazhe; Yang, Ke; xmyu@imr.ac.cn
	2015
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	644 页码:698-703
摘要	In this study, high quality Ta coating was made on both plate and porous Ti6Al4V alloy substrates by atmospheric pressure chemical vapor deposition (APCVD) in order to further improve the corrosion resistance and biocompatibility of Ti alloys for medical application. XRD analyses showed that the coatings were mainly composed of Ta with the substrate temperature (T-s) of 1000 degrees C, 950 degrees C and 900 degrees C. The morphology, microstructure and elements composition were characterized by optical microscope, scanning electron microscopy (SEM), atomic force microscopy (AFM) and energy-dispersive spectroscopy (EDS). It was found that the coating surface became much more smooth and uniform at low H-2 gas flow rate of 120 mL/min, and the root-mean-square (RMS) roughness was decreased with the increase of T-s,. The wettability of Ta coating was investigated by measuring contact angel of water and alpha-bromonaphthalene (alpha-BrNp). The Ta coating with Ts of 950 degrees C showed the lowest of gamma(s), gamma(d)(s) and gamma(d)(s)/gamma(p)(s)), indicating a better hemocompatibility of the Ta coating than that of substrate. The corrosion behavior of the coating was studied by electrochemical test in 0.9% NaCl solution at 37 degrees C. The Ta coating exhibited higher corrosion potential (E-corr) and lower corrosion current density indicating an improved corrosion resistance compared with the Ti6Al4V substrate. Ta coating was fabricated not only on the plate substrate, but also on a porous Ti6Al4V substrate. The above results made it possible to develop a novel class of Ta-coated Ti alloy implants with wide clinical applications. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[yu, xiaoming ; tan, lili ; yang, huazhe ; yang, ke] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词	Ti6al4v Ta Cvd Coating Corrosion
资助者	National Basic Research Program of China (973 Program) [2012CB619101]; Foundation of the Education Department of Liaoning Province [L2013285]
收录类别	sci
语种	英语
WOS记录号	WOS:000357143900101
引用统计	被引频次：35[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75154
专题	中国科学院金属研究所
通讯作者	xmyu@imr.ac.cn
推荐引用方式 GB/T 7714	Yu, Xiaoming,Tan, Lili,Yang, Huazhe,et al. Surface characterization and preparation of Ta coating on Ti6Al4V alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2015,644:698-703.
APA	Yu, Xiaoming,Tan, Lili,Yang, Huazhe,Yang, Ke,&xmyu@imr.ac.cn.(2015).Surface characterization and preparation of Ta coating on Ti6Al4V alloy.JOURNAL OF ALLOYS AND COMPOUNDS,644,698-703.
MLA	Yu, Xiaoming,et al."Surface characterization and preparation of Ta coating on Ti6Al4V alloy".JOURNAL OF ALLOYS AND COMPOUNDS 644(2015):698-703.