Suka T
Nihon Seikeigeka Gakkai Zasshi. 1986 Jun;60(6):637-47.
Ceramic has excellent properties. However, the brittleness of ceramic is one of the major problems. Coating ceramic on stronger substance materials may be one of the ways to overcome this problem. In this study, stainless steel (316L) coated with titanium nitride ceramic (TiN), produced by using a physical vapor deposition method, was investigated. The results indicated that although the yielding strength was decreased by exposing the material to 550 degrees C, the grain structure did not change. Stainless steel with 3.0 micron TiN coating demonstrated high resistance to bending stress and friction. In addition, this material displayed sufficient fatigue strength for an orthopaedic implant after 10(7) loading repetitions. Based on organ cultures and animal experiments, the biocompatibility of TiN coated stainless steel appeared to be superior to uncoated stainless steel. The TiN coating dissolved in H2O2 although it was stable to HNO3. In conclusion, titanium nitride ceramic coated stainless steel appears to be a promising material for implantation. However, further investigation is necessary for a long term results as an implant material.
陶瓷具有优异的性能。然而，陶瓷的脆性是主要问题之一。在强度更高的物质材料上涂覆陶瓷可能是克服这一问题的方法之一。在本研究中，对采用物理气相沉积法制备的涂有氮化钛陶瓷（TiN）的不锈钢（316L）进行了研究。结果表明，尽管将材料暴露在550摄氏度下会使其屈服强度降低，但晶粒结构并未改变。具有3.0微米TiN涂层的不锈钢表现出高抗弯应力和高耐磨性。此外，这种材料在经过10^7次加载循环后，对骨科植入物显示出足够的疲劳强度。基于器官培养和动物实验，涂有TiN的不锈钢的生物相容性似乎优于未涂覆的不锈钢。TiN涂层在HNO3中稳定，但在H2O2中会溶解。总之，氮化钛陶瓷涂覆的不锈钢似乎是一种有前景的植入材料。然而，作为植入材料，需要进一步研究以获得长期结果。
