| 摘要: |
| 研究了不同阳极氧化处理时间下常规TiNi和超细晶TiNi合金表面形貌及其浸泡在体外模拟体液（SBF）下21天后的生物活性。结果表明：与常规TiNi合金相比，超细晶TiNi合金含有数量略多的微米尺度沟壑，生物活性亦较高。氧化时间从3 min增加到9 min时，合金的氧化程度增加，常规TiNi合金的生物活性（模拟体液中CaP层的生长速率）显著增加，而超细晶TiNi合金的生物活性仅轻微增加；Ca/P比都出现明显下降，常规TiNi合金的Ca/P比从1.68降低到1.44，超细晶TiNi合金从1.62下降到1.43。这表明TiNi合金组织超细化增加了其生物活性，适当延长氧化时间有助于进一步提高合金的生物活性。 |
| 关键词: 超细晶TiNi合金 阳极氧化 表面形貌 生物活性 |
| DOI： |
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| Bioactivity of Conventional TiNi and Ultrafinegrained TiNi Alloy Under Different Anodic Oxidation Times |
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XU Xiaojing, ZHU Lihua, ZHANG Tifeng, LING Zhiyong, SHENG Xinlan, LIU Min, NIU Xiaoya
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Engineering Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang 212013, JiangSu
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| Abstract: |
| The surface morphology and bioactivity after immersion in simulated body fluid (SBF) for 21 days of conventional TiNi alloy and ultrafinegrained TiNi alloy under different anodic oxidation times were investigated. The results show that compared with the conventional TiNi alloy, the anodic oxidized surface of ultrafinegrained TiNi alloy slightly exhibits more micrometerscale donga and higher bioactivity. With the increase of anodic oxidation time from 3 min to 9 min, the conventional TiNi alloy exhibits much higher bioactivity (growth rate of CaP layer in SBF), while the ultrafinegrained TiNi alloy only exhibits slightly higher bioactivity. The Ca/P ratios of conventional TiNi alloy and ultrafinegrained TiNi alloy decrease from 1.68 to 1.44, and from1.62 to 1.43, respectively. It means that the ultrafinement processing of microstructure is an effective approach to improve bioactivity, and appropriate extension of anodic oxidation time contributes to further enhancement of bioactivity. |
| Key words: ultrafinegrained TiNi anodic oxidation surface morphology bioactivity |
