作　　者： ; ; ; ;

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3期191-195,共5页

摘　　要： 采用电沉积水热合成法和高温煅烧相结合的方法,制备了生物陶瓷涂层,研究了涂层与基体间过渡层的物相组成和界面结合强度。用X射线(XRD)、扫描电镜(SEM)和粘接拉伸法进行分析。研究结果表明:水热合成后,界面结合强度较低,为7.04MPa。在空气中煅烧,700℃以下时,界面出现极薄TiO_2层,同时随着煅烧温度的升高,界面结合强度提高;800℃以上时,由于厚而疏松的TiN过渡层的出现,界面结合强度反而下降。为获取对骨生长有利的HAP+β-Ca_3(PO_4)_2双相结构,且界面结合强度高的涂层材料,将原始试样用NaOH碱液处理,电沉积水热合成后,在氢气中于900℃煅烧,过渡层为薄且致密的TiO_2层,可获得高的界面结合强度,为22.39MPa。 Bioceramic coating is prepared by electrodeposition- hydrothermal synthesis and calcinations. This article studies the phase composition of transitional layer and the bonding strength of the coating and the based material. The results show that: after hydrothermal synthesis, the bonding strength is low which is 7.04 MPa but increasing after calcinations. Calcinations under 700 ℃, the bonding strength of the coating increases with temperature increasing. After calcinations above 800 ℃, because of the appearance of the thick and loose transition phase which compose TiN and TiO_2, the bonding strength of the coating decreases. In order to get biphasic HAP+β-Ca_3 (PO_4)_2 which is more benefit to bone growth and high bonding strength, the samples are pre-treated in NaOH solution and calcinations in Ar at 900 ℃. The transition phase becomes a density layer which is TiO_2, the bonding strength increases obviously achieving 22.39 MPa. A development of increasing the bonding strength of the coating and the based material is obtained.

关 键 词： 电沉积 水热合成 煅烧 生物陶瓷涂层 界面结合强度

领　　域： [化学工程] [化学工程]