燃烧合成-水热法制备生物陶瓷涂层

来源期刊：中南大学学报(自然科学版)2002年第6期

论文作者：刘咏 刘芳 周科朝 张伟

文章页码：604 - 607

关键词：燃烧合成-水热法;生物陶瓷;涂层;界面结合强度

Key words：combustion synthesis-hydrothermal treatment; bioceramic; coating; the binding strength

摘    要：采用燃烧合成-水热法制备生物陶瓷涂层,用X射线衍射(XRD)、扫描电镜(SEM)和粘接拉伸法研究了涂层物相组成、形貌以及涂层与基体的界面结合强度.研究结果表明:燃烧合成后,涂层主要由HA+β-Ca₃(PO₄)₂组成,水热处理2 h后,涂层中HA含量增加,延长水热处理时间,可得到纯HA涂层;涂层厚约为20μm;在燃烧合成试剂中添加助燃剂,涂层中相成分复杂化,但水热处理10 h后,可得到纯羟基磷灰石相,涂层厚度增加,达到50μm左右;同时,添加助燃剂可大大提高界面结合强度,达到13.66 MPa.

Abstract: Bioceramic coating is prepared by combustion synthesis-hydrothermal treatment. XRD, SEMand bonding-ten-sile are used to analyze the phase composition of coating, microstructure and the bonding strength. The results show that the coating is composed of HA andβ-Ca₃(PO₄)₂after combustion synthesis. After hydrothermal treatment for 2 h, the volume of HA increases. A coating whose thickness is 20μm and pure HA is obtained. When combustible substance is added, mixed phase appears but changes into pure HA after hydrothermal treatment for 10 h. The coating thickness is 50μm and the bonding strength increases to 13.66 MPa. Key words:combustion synthesis-hydrothermal treatment; bioceramic; coating; the binding strength