采用等离子喷涂技术，在Ｔｉ－６Ａｌ－４Ｖ基体上成功地制备了羟基磷灰石／氧化锆（ＨＡ／ＺｒＯ２）复合涂层，对涂层的微观结构、相组成和结合强度进行了研究，并以模拟体液试验评估涂层的生物活性．结果表明，复合涂层具有较为均匀的微观结构．ＨＡ／ＺｒＯ２复合涂层的结合强度明显高于 ＨＡ涂层， ＨＡ／６０ ｗｔ％ ＺｒＯ２涂层的结合强度高达 ２８．５ＭＰａ，为 ＨＡ涂层的 ２．２倍．复合涂层在模拟体液中浸泡一段时间后，表面覆盖一层碳酸磷灰石（ｃａｒｂｏｎａｔｅ－ａｐａｔｉｔｅ），表明涂层具有良好的生物活性．
HA/ZrO2 composite coatings on Ti-6Al-4V substrate were successfully deposited via plasma spraying.
The surface morphology, phase composition and bonding strength of coatings were investigated. Simulated body fluid (SBF) tests were carried out to
evaluate the bioactivity of the coatings. The results obtained indicate that the bonding strength of HA/ZrO2 composite coatings is much higher
than that of HA coating. The bonding strength of HA/ZrO2 60 wt% composite coating is even high to 28.5 MPa, which is more than twice
that of HA coating. In SBF test, the coating surface was covered by carbonate-apatite, which indicates that HA/ZrO2 composite coatings
possess good bioactivity.
参考文献
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