(1. 華南理工大學 機電工程學院，廣州 510641；
2. 華南理工大學 材料科學 與工程學院，廣州 510641；
3. 華南理工大學 應用物理系，廣州 510641)
摘 要: 用透射電子顯微鏡對鈦合金基體等離子噴涂羥基磷灰石(HA)生物活性梯度涂層的界 面進行了觀察與分析。結(jié)果表明：經(jīng)熱處理后生物活性梯度涂層的結(jié)晶程度明顯提高，涂層中存在HA晶體、β-Ca3(PO4)2晶體以及中間相CaTiO3晶體。涂層和基體的界面結(jié)合為冶金化學結(jié)合，HA涂層和基體Ti間存在過渡相ZrO2，過渡相ZrO2的存在有利于提高涂層和基體之間的界面結(jié)合力。
關鍵字: 羥基磷灰石(HA)；等離子噴涂；涂層；界面
hydroxyapatite bioactive gradient coating
（1. School of Electro-mechanical Engineering,
South China University of Technology, Guangzhou 510641, China;
2. School of Materials of Science and Engineering,
South China University of Technology, Guangzhou 510641, China；
3. Department of Applied Physics, South China University of
Technology, Guangzhou 510641, China）
Abstract:The interface between plasma spray hydroxyapatite(HA) bioactive gradient coating and Ti-6Al-4V matrix was studied using transmission electron microscopy. Phases such as crystalline hydroxyapatite，crystalline β-Ca3(PO4)2 and ZrO2 were identified. Metallurgy-chemical bonding was formed between coating and matrix and transitional phase CaTiO3 was observed. The existence of ZrO2 can improve the bonding force between coating and matrix.
Key words: hydroxyapatite(HA); plasma spray; coating; interface
