摘要
采用亚音速火焰喷涂方法,通过合理选用打底层粉和工作层粉,探讨喷涂羟基磷灰石生物涂层的可行性。试验证明:以纯钛粉作为打底层粉,在喷涂过程中靠粉末燃烧自放热效应,在打底层中形成了TiO2,Ti2O3和TiN相,造成部分质点达到微冶金结合。该相与Ti6Al4V基材线膨胀系数相近,喷涂中产生的热应力较小,获得了较高的结合强度。在喷涂过程中,HA粉发生了一定量的分解,最终涂层形成HA相、TTCP和TCP相。而加入5%Y2O3的HA粉所形成的涂层,HA含量高,形成的TTCP相和TCP相少,并有Y2O3相产生,且涂层贯穿裂纹减少,孔隙增多,利于人工种植,提高结合强度。
A new method for preparing biomaterial composite coating by means of subsonic flame spraying was investigated. It also discussed how to choose the substrate and the sublayer material reasonably. The experimental results show that TiO2, Ti2O3 and TiN formed on the sublayer when pure Ti powders are arechosen as substrate, which gives out heat during the spraying process by burning itself. This makes part particles form micrometallurgy linkage in the substrate. Moreover, the heat stress produced during the spraying process is quite low, because the liner expansion coefficients of phases of TiO2, Ti2O3 and TiN with substrate are quite similar. Because the decomposition of HA powders takes place partly during the spraying process, the phases of HA, TTCP and TCP are formed. When the layer formed by adding HA powder containing 5% Y2O3, the phases of TTCP and TCP are diminished and the phases of Y2O3 is appeared. Meanwhile, in the coating layer, the running through crack decreases, so that the bond strength of the coating layer is enhanced.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第1期58-60,共3页
Journal of the Chinese Society of Rare Earths
基金
黑龙江省自然科学基金资助项目
