...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of biomedical materials research, Part A >Surface characteristics, biocompatibility, and mechanical properties of nickel-titanium plasma-implanted with nitrogen at different implantation voltages
【24h】

Surface characteristics, biocompatibility, and mechanical properties of nickel-titanium plasma-implanted with nitrogen at different implantation voltages

机译：在不同注入电压下等离子注入氮的镍钛合金的表面特性，生物相容性和力学性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

NiTi shape memory alloy is one of the promising orthopedic materials due to the unique shape memory effect and superelasticity. However, the large amount of Ni in the alloy may cause allergic reactions and toxic effects thereby limiting its applications. In this work, the surface of NiTi alloy was modified by nitrogen plasma immersion ion implantation (N-PIII) at various voltages. The materials were characterized by X-ray photoelectron spectroscopy (XPS). The topography and roughness before and after N-PIII were measured by atomic force microscope. The effects of the modified surfaces on nickel release and cytotoxicity were assessed by immersion tests and cell cultures. The XPS results reveal that near-surface Ni concentration is significantly reduced by PIII and the surface TiN layer suppresses nickel release and favors osteoblast proliferation, especially for samples implanted at higher voltages. The surfaces produced at higher voltages of 30 and 40 kV show better adhesion ability to osteoblasts compared to the unimplanted and 20 kV PIII samples. The effects of heating during PIII on the phase transformation behavior and cyclic deformation response of the materials were investigated by differential scanning calorimetry and three-point bending tests. Our results show that N-PIII conducted using the proper conditions improves the biocompatibility and mechanical properties of the NiTi alloy significantly.
机译：NiTi形状记忆合金由于其独特的形状记忆效应和超弹性而成为有前途的骨科材料之一。但是，合金中大量的镍会引起过敏反应和毒性作用，从而限制了其应用。在这项工作中，NiTi合金的表面在不同电压下通过氮等离子体浸没离子注入（N-PIII）进行了改性。通过X射线光电子能谱（XPS）对材料进行了表征。用原子力显微镜测量N-PIII前后的形貌和粗糙度。通过浸没测试和细胞培养评估了改性表面对镍释放和细胞毒性的影响。 XPS结果表明，PIII可显着降低近表面Ni的浓度，并且表面TiN层可抑制镍的释放并促进成骨细胞的增殖，特别是对于以较高电压植入的样品。与未植入和20 kV PIII样品相比，在30 kV和40 kV较高电压下产生的表面对成骨细胞的粘附能力更好。通过差示扫描量热法和三点弯曲试验研究了在PIII中加热对材料的相变行为和循环变形响应的影响。我们的结果表明，在适当的条件下进行的N-PIII可以显着改善NiTi合金的生物相容性和机械性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号