文献类型：期刊文献

英文题名：Mechanical properties and dissolution behavior of plasma sprayed wollastonite coatings deposited at different substrate temperatures

作者：Wang, Weize[1]; Liang, Jiachun[1]; Guo, Xueping[2]; Xuan, Fuzhen[1]; Hong, Huoxing[1]

机构：[1] Key Lab of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; [2] Marine Engineering College, Dalian Maritime University, Dalian 116026, China

年份：2012

卷号：21

期号：3-4

起止页码：496

外文期刊名：Journal of Thermal Spray Technology

收录：EI(收录号：20122415106996)

语种：英文

外文关键词：Calcium compounds - Dissolution - Plasma jets - Silicate minerals - Substrates - Atmospheric temperature

摘要：The effect of substrate temperature on the microstructure, mechanical properties and dissolution behavior of wollastonite coatings is investigated. The crystallinity of as-deposited coatings increases with increasing substrate temperature, whereas the porosity shows only a little variable tendency. The Knoop hardness and elastic modulus increase with the substrate temperature up to 400 °C firstly, and then a decrement is observed with the temperature further increasing to 600 °C. The dissolution rate characterized by the pH changes and the ion concentration changes of Ca, Si and P in SBF decreases with the increase in the substrate temperature. It can be concluded that increasing the substrate temperature is afeasible method to improve the mechanical properties and to decrease the dissolution rate of wollastonite coatings. However, the bioactivity of coatings deposited on preheated substrates is superior to those on non-preheated ones, which presumably results from their different phase compositions. ? ASM International.