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- Title
Effect of Spray Distance on Microstructure and Tribological Performance of Suspension Plasma-Sprayed Hydroxyapatite-Titania Composite Coatings.
- Authors
Zhang, Chao; Xu, Haifeng; Geng, Xin; Wang, Jingjing; Xiao, Jinkun; Zhu, Peizhi
- Abstract
Hydroxyapatite (HA)-titania (TiO) composite coatings prepared on Ti6Al4V alloy surface can combine the excellent mechanical property of the alloy substrate and the good biocompatibility of the coating material. In this paper, HA-TiO composite coatings were deposited on Ti6Al4V substrates using suspension plasma spray (SPS). X-ray diffraction, scanning electron microscopy, Fourier infrared absorption spectrometry and friction tests were used to analyze the microstructure and tribological properties of the obtained coatings. The results showed that the spray distance had an important influence on coating microstructure and tribological performance. The amount of decomposition phases decreased as the spray distance increased. The increase in spray distance from 80 to 110 mm improved the crystalline HA content and decreased the wear performance of the SPS coatings. In addition, the spray distance had a big effect on the coating morphology due to different substrate temperature resulting from different spray distance. Furthermore, a significant presence of OH and CO was observed, which was favorable for the biomedical applications.
- Subjects
COMPOSITE materials; HYDROXYAPATITE coating; TITANIUM dioxide; TRIBOLOGY; MICROSTRUCTURE
- Publication
Journal of Thermal Spray Technology, 2016, Vol 25, Issue 7, p1255
- ISSN
1059-9630
- Publication type
Article
- DOI
10.1007/s11666-016-0453-1