引用本文:胡晓霞,吕宇鹏,李阳,李士同,陈鹭滨.预应力对羟基磷灰石涂层热处理行为的影响[J].中国表面工程,2010,(3):46~50
HU Xiao-xia,LU Yu-peng,LI Yang,LI Shi-tong,CHEN Lu-bin.Effect of Pre-Stress on Heat Treatment Behavior of Hydroxyapatite Coating[J].China Surface Engineering,2010,(3):46~50
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预应力对羟基磷灰石涂层热处理行为的影响
胡晓霞,吕宇鹏,李阳,李士同,陈鹭滨
山东大学 a. 材料液固结构演变与加工教育部重点实验室，b. 材料科学与工程学院，济南 250061
摘要:
在工业纯钛表面采用等离子法制备羟基磷灰石涂层,然后分别在自由态(无应力)、预加正应力、同时预加正应力与切应力三种不同条件下热处理.利用电子拉伸试验机进行剪切结合强度测试,利用电子探针观察剪切试验断口形貌和涂层/基体界面处组织形貌与微区元素分布,以探讨应力条件下热处理对涂层/基体界面的影响.研究表明:热处理过程施加预应力可以提高涂层与基体的剪切结合强度,其原因可能是预应力的施加促进了涂层与基体间元素扩散,并使涂层中的裂纹产生一定程度的闭合.
关键词:  羟基磷灰石涂层  热处理  结合强度  裂纹  预应力
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基金项目:山东省自然科学基金项目(Y2008F34)；山东省优秀中青年科学家科研奖励基金项目(2006BS04022)
Effect of Pre-Stress on Heat Treatment Behavior of Hydroxyapatite Coating
HU Xiao-xia,LU Yu-peng,LI Yang,LI Shi-tong,CHEN Lu-bin1,2
1.a. Key Laboratory for Liquid–solid Structural Evolution and Processing of Materials Ministry of Education;2.b. School of Materials Science and Engineering, Shandong University, Jinan 250061
Abstract:
Hydroxyapatite (HA) coatings on industrial pure titanium were heat treated under three different conditions: without stress, with compressive stress and with both of compressive and shearing stress. The shear strength between the coating and the substrate was measured on electronic tension machine and cross–sectional microstructures and elements distribution in micro zone were detected with Electron Probe Microanalyser (EPMA), to evaluate the effect of pre–stress on heat treatment behavior of hydroxyapatite coatings. The results showed that the bonding strength of the interface increased with the pre–stress onto the samples during heat treatment, which may be caused by the pre–stress accelerating the diffusion of element between coating and substrate. Moreover, proper pressure would bring closure of the cracks in the coatings.
Key words:  hydroxyapatite coatings  heat treatment  bonding strength  crack  compressive stress
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