机构地区: 中南大学材料科学与工程学院粉末冶金国家重点实验室
出 处: 《粉末冶金材料科学与工程》 2003年第2期103-107,共5页
摘 要: 采用燃烧合成-水热法制备了生物陶瓷涂层,用X射线衍射(XRD)、扫描电镜(SEM)和粘接拉伸法分析了涂层物相组成、形貌和涂层与基体的界面结合强度,结果表明:燃烧合成后,涂层主要由HA+β-Ca_3(PO_4)_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,得到纯HA涂层,涂层厚度为20μm左右。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,得到纯羟基磷灰石相,涂层厚度有所增加,达到50 μm左右。同时,助燃剂的添加大大提高了界面结合强度(13.66 MPa)。 Bioceramic coating was prepared by combustion synthesis-hydrothermal treatment. XRD, SEM and bonding-tensile are used to analyze the phase composition of coating, microstructure and the bonding strength. The results show that the coating consists of HA and β-Ca_3(PO_4)_2 after combustion synthesis. Hydrothermal treatment for 2 h, the content of HA increases. A coating with 20 μm in thickness and pure HA was obtained. When combustible substance is added, mixed phase appears but changes into pure HA after hydrothermal treatment for 10 h. The coating is 50μm in thickness and the bonding strength increases to 13.66 MPa.