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首页> 外文期刊>Journal of Basic and Applied Physics >The Effect of Radio Frequency Plasma Nitriding on Biocompatibility of Nickel-Titanium Shape Memory Alloys
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The Effect of Radio Frequency Plasma Nitriding on Biocompatibility of Nickel-Titanium Shape Memory Alloys

机译：射频等离子体氮化对镍钛形状记忆合金生物相容性的影响

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摘要

Nickel-titanium (Ni-Ti) shape memory alloys (SMAs) are attractive materials for orthopedic and dental implants, due to its two intrinsic properties including shape memory effect (SME) and superelasticity (SE), which may not be found in other commonly-used surgical metals. Possible Ni ion release, however, hampers their medical applications, particularly in orthopedic implants where fretting is always expected at the articulating surface. Inductively coupled radio frequency plasma (ICRFP) was employed to alter the surface of equiatomic Ni-Ti discs in order to create a barrier to out-diffusion of Ni ions from the bulk material. The ICRFP experiments were carried out with nitrogen, which promoted the formation of a titanium nitride layer on the surface of the Ni-Ti samples. The present paper explores the biocompatibility and performance of the ICRFP treated and untreated Ni-Ti samples. The results confirm that nitrogen plasma modified Ni-Ti alloys are potentially suitable materials for orthopedics without inducing harmful biological effects.
机译：镍钛（Ni-Ti）形状记忆合金（SMA）是矫形和牙科植入物的诱人材料，因为它具有两个固有特性，包括形状记忆效应（SME）和超弹性（SE），这是其他常见的特性二手手术金属。然而，可能的镍离子释放会阻碍其医学应用，尤其是在始终期望在关节表面微动的整形外科植入物中。感应耦合射频等离子体（ICRFP）用于改变等原子Ni-Ti圆盘的表面，以创建一个屏障，阻止镍离子从散装材料中向外扩散。用氮进行ICRFP实验，这促进了Ni-Ti样品表面上氮化钛层的形成。本文探讨了ICRFP处理和未处理的Ni-Ti样品的生物相容性和性能。结果证实，氮等离子体改性的Ni-Ti合金可能是骨科的合适材料，而不会引起有害的生物学作用。

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