摘要
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。
In order to improve the surface bioactivity of β-Ti-24Nb-4Zr-7.9Sn alloy with low elastic modulus and high strength, an oxidation layer was formed on the alloy by thermal oxidation, which is able to induce a bone-like apatite layer in simulated body fluid （ SBF ）. The morphology and various phases of samples before and after immerging in the SBF were characterized and water wettability contact angle and valence change of the surfaces of samples oxidized at different temperatures were analyzed. The effects of oxidizing temperature on bone-like apatite forming on the alloy consequently were discussed. The results show that the surfaces of the alloy layers oxidized at 550℃ and 650 ℃ for 3h are fully and uniformly covered with oxide layer consisting of titanium oxide, niobium oxide and stannous oxide. The higher the temperature is, the thicker of the oxide layer and the more TiO2 content are. The sample oxidized at 650℃ is more immersible and has higher bioactivity. After immerged in the SBF for 5 days, the uniform and complete apatite layers can be deposited.
出处
《金属热处理》
CAS
CSCD
北大核心
2009年第1期80-84,共5页
Heat Treatment of Metals
基金
国家自然科学基金项目(50572068)
