文献类型：期刊文献

中文题名：Effect of Applied Stresses on the Microstructure and Dissolution Behavior of Plasma Sprayed Wollastonite Coatings

英文题名：Effect of Applied Stresses on the Microstructure and Dissolution Behavior of Plasma Sprayed Wollastonite Coatings

作者：Wang Weize[1];Liang Jiachun;Xuan Fuzhen;Hong Huoxing

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2012

卷号：41

期号：S1

起止页码：443

中文期刊名：稀有金属材料与工程

外文期刊名：RARE METAL MATERIALS AND ENGINEERING

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000303635900106)】；北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：NSFC(50805048); SNSF(08ZR1405700); YTFEM(200802511008); SRS(10QA1401500, 09521101304); SLADP (B503)

语种：英文

中文关键词：engineering;wollastonite;coating;stress;microstructure;dissolution

外文关键词：engineering wollastonite coating; stress; microstructure; dissolution

摘要：Wollastonite coatings were deposited on the U-shape titanium alloy coupons by atmospheric plasma spraying.The effect of applied stresses on the microstructure and dissolution behavior of wollastonite coatings was investigated.The microstructure and composition of coatings were examined by scanning electron microscope(SEM)and electron diffraction spectroscopy(EDS).In addition,the dissolution behavior of coatings was evaluated by immersion in simulated body fluid(SBF).More apatite is observed on the surface of coatings under a tensile stress and a stress-free condition after immersion in the SBF solution,whereas almost no apatite can be found for the coatings under a compressive stress.The dissolution rate of coatings characterized by the pH changes and the ion concentration of Ca,Si and P in the SBF solution is lower under the compressive stress than those under a tensile stress or a stress-free condition.It can be concluded from the experimental results that the compressive stress inhibits the dissolution of wollastonite coatings and the formation of apatite,whereas a tensile stress enhances the two processes.
Wollastonite coatings were deposited on the U-shape titanium alloy coupons by atmospheric plasma spraying. The effect of applied stresses on the microstructure and dissolution behavior of wollastonite coatings was investigated. The microstructure and composition of coatings were examined by scanning electron microscope (SEM) and electron diffraction spectroscopy (EDS). In addition, the dissolution behavior of coatings was evaluated by immersion in simulated body fluid (SBF). More apatite is observed on the surface of coatings under a tensile stress and a stress-free condition after immersion in the SBF solution, whereas almost no apatite can be found for the coatings under a compressive stress. The dissolution rate of coatings characterized by the pH changes and the ion concentration of Ca, Si and P in the SBF solution is lower under the compressive stress than those under a tensile stress or a stress-free condition. It can be concluded from the experimental results that the compressive stress inhibits the dissolution of wollastonite coatings and the formation of apatite, whereas a tensile stress enhances the two processes.