Surface characterization and preparation of Ta coating on Ti6Al4V alloy

doi:10.1016/j.jallcom.2015.04.207

IMR OpenIR

	Surface characterization and preparation of Ta coating on Ti6Al4V alloy
	Yu, Xiaoming; Tan, Lili; Yang, Huazhe; Yang, Ke
通讯作者	Yu, Xiaoming(xmyu@imr.ac.cn)
	2015-09-25
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.
关键词	Ti6Al4V Ta CVD Coating Corrosion
资助者	National Basic Research Program of China (973 Program) ; Foundation of the Education Department of Liaoning Province
DOI	10.1016/j.jallcom.2015.04.207
收录类别	SCI
语种	英语
资助项目	National Basic Research Program of China (973 Program)[2012CB619101] ; Foundation of the Education Department of Liaoning Province[L2013285]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000357143900101
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/80950
通讯作者	Yu, Xiaoming
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
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.(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.