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采用热氧化的方法在新型高强度、低弹性模量β-Ti-24Nb-4Zr-7.9Sn合金表面制备了氧化层,改善其生物活性,进而在模拟体液(SBF)中诱导类骨磷灰石生长。通过对不同温度氧化试样在浸入SBF前后的表面形貌、相组成、组元化合价及接触角的变化分析,探讨了氧化温度对合金表面类骨磷灰石形成的影响。结果表明,550℃及650℃氧化3h后,合金表面被Ti、Nb、Sn等不同价态的氧化物层完全覆盖,温度越高,氧化层越厚,其中金红石TiO2的量也就越多。650℃氧化试样表面浸润性较好,生物活性高,在SBF中浸泡5天,可沉积出均匀、完整的类骨磷灰石层。
Oxidation layer was prepared on the surface of a new type of high strength and low elastic modulus β-Ti-24Nb-4Zr-7.9Sn alloy by thermal oxidation to improve its biological activity and induce osteo apatite in simulated body fluid (SBF) Grow. The effect of oxidation temperature on the formation of bone-like apatite on the surface of the alloy was discussed by analyzing the surface morphology, phase composition, valence of the component and contact angle before and after immersion in the SBF. The results show that the surface of the alloy is completely covered by oxide layers with different valence states such as Ti, Nb and Sn after being oxidized at 550 ℃ and 650 ℃ for 3h. The higher the temperature, the thicker the oxide layer, and the more rutile TiO2 is. The surface of 650 ℃ oxidation sample has good wettability and high biological activity. Soaked in SBF for 5 days, a homogeneous and intact bone-like apatite layer can be deposited.