等离子喷涂生物活性硅灰石涂层研究(英文)

Study on Plasma Sprayed Bioactive Wollastonite Coatings

采用等离子喷涂技术,将硅灰石陶瓷沉积于钛合金基体表面,制备了硅灰石涂层,对涂层的工艺、结构和性能作了研究.在此基础上,又制备了硅灰石TiO2 复合涂层、硅灰石ZrO2 复合涂层和硅酸二钙涂层,并研究了它们的结构和性能.研究结果证实:等离子喷涂硅灰石涂层、硅酸二钙涂层以及W7T3、W3Z7、W7Z3三种复合涂层都具有良好的生物活性又与钛合金基体有较高的结合强度。

A novel bioactive ceramic, wollastonite, was deposited onto Ti-6Al-4V substrate using plasma spraying technology for improving its bioactivity and biocompatibility. The process, structures and properties of plasma sprayed wollastonite coating were examined using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared spectroscopy and etc. In order to upgrade the properties of wollastonite coating, the wollastonite/TiO 2 and wollastonite/ZrO 2 composite coatings and dicalcium silicate coating are also prepared and examined. The results showed that wollastonite and its composite coatings with certain content of wollastonite possessed good bioactivity, biocompatibility as well as tight bonding to Ti-6Al-4V substrate, indicating they may be candidates for bone graft in human body.