氧化温度对β-Ti-24Nb-4Zr-7．9Sn合金表面生物活性的影响  

Effects of oxidizing temperature on surface bioactivity of β-Ti-24Nb-4Zr-7.9Sn alloy

作　　者：陈民芳[1,2] 王晓伟[1] 崔忠波[1] 由臣[1] 李述军[2] 杨锐[2] 

机构地区：[1]天津理工大学材料科学与工程学院,天津300191 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《金属热处理》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)

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.

关 键 词：类骨磷灰石 β-Ti-24Nb-4Zr-7.9Sn合金 氧化温度 生物活性 

分 类 号：TG146.4[一般工业技术—材料科学与工程]