Applied Materials Science, Uppsala University, Uppsala, Sweden.
J Mater Sci Mater Med. 2012 Aug;23(8):1879-89. doi: 10.1007/s10856-012-4625-3. Epub 2012 Jun 12.
Wear particles from the bearing surfaces of joint implants are one of the main limiting factors for total implant longevity. Si(3)N(4) is a potential wear resistant alternative for total joint replacements. In this study, Si(x)N(y)-coatings were deposited on cobalt chromium-discs and Si-wafers by a physical vapour deposition process. The tribological properties, as well as surface appearance, chemical composition, phase composition, structure and hardness of these coatings were analysed. The coatings were found to be amorphous or nanocrystalline, with a hardness and coefficient of friction against Si(3)N(4) similar to that found for bulk Si(3)N(4). The low wear rate of the coatings indicates that they have a potential as bearing surfaces of joint replacements. The adhesion to the substrates remains to be improved.
关节植入物的轴承表面磨损颗粒是影响植入物整体寿命的主要因素之一。Si(3)N(4)是全关节置换的一种潜在耐磨替代品。在这项研究中，Si(x)N(y)涂层通过物理气相沉积工艺沉积在钴铬圆盘和硅片上。分析了这些涂层的摩擦学性能以及表面外观、化学成分、相组成、结构和硬度。发现涂层为非晶态或纳米晶态，与块状 Si(3)N(4)相比，涂层具有相似的硬度和摩擦系数。涂层的低磨损率表明它们具有作为关节置换的轴承表面的潜力。但涂层与基底的附着力还有待提高。
