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首页> 外文会议>NATO Advanced Research Workshop on Nanostructured Materials and Coatings for Biomedical and Sensor Applications Aug 4-8, 2002 Kyiv, Ukraine >LOW FRICTION WEAR RESISTANT SPUTTERED CARBON COATINGS FOR BIOMEDICAL APPLICATIONS
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LOW FRICTION WEAR RESISTANT SPUTTERED CARBON COATINGS FOR BIOMEDICAL APPLICATIONS

机译：用于生物医学的低摩擦耐磨溅射碳涂层

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Sputtered carbon coatings have been reported to have excellent tribological properties (low friction coefficient and wear rate) and therefore have the potential to be used as hard, solid lubricant, wear resistant coatings. During a research program aimed at reducing the wear of UHMWPE hip joint prostheses by coating the metal femoral head, a new type of carbon coating was developed which now has the trade name Graphit-iC~(TM). This coating gave exceptional friction and wear results in simple laboratory tests against coated and uncoated metal counterfaces, but not against UHMWPE as originally intended. Research was redirected towards the production of Graphit-iC coated metal-on-metal THR, and simple configuration laboratory tests predicted a prosthetic lifetime in excess of 50 years. CoCrMo prostheses were subsequently coated and performed well in pendulum tests conducted at the University of Leeds. Further tests on a physiological hip simulator gave mixed results with coating failure detected on some pairs, whilst one pair showed no detectable wear after considerable testing. Further testing is required to fully establish the cause of the failures. Recent work has studied characteristics of the Graphit-iC coating under a wider range of deposition parameters with a view to producing increased toughness for softer substrates, or graded coatings which reach steady state friction values more quickly, or provide different surface characteristics to bulk characteristics. Biocompatibility tests indicate that the Graphit-iC coating may be a suitable surface for hip joint, and other, implants used within the body.
机译：据报道，溅射碳涂层具有优异的摩擦学性能（低摩擦系数和磨损率），因此有潜力用作硬质，固体润滑剂，耐磨涂层。在一项旨在通过覆盖金属股骨头以减少UHMWPE髋关节假体磨损的研究计划中，开发了一种新型的碳涂层，该碳涂层现在的商品名为Graphit-iC〜（TM）。在简单的实验室测试中，这种涂层在有涂层和无涂层的金属对接面上产生了优异的摩擦和磨损结果，但没有达到原本打算的UHMWPE。研究转向了Graphit-iC涂层金属对金属THR的生产，简单的配置实验室测试预测假肢寿命超过50年。随后对CoCrMo假体进行涂覆，并在利兹大学进行的摆锤测试中表现良好。在生理性髋关节模拟器上进行的进一步测试给出了混合的结果，在某些对上检测到涂层失效，而一对在经过大量测试后显示没有可检测到的磨损。需要进一步测试以完全确定故障原因。最近的工作已经研究了在较宽的沉积参数范围内的Graphit-iC涂层的特性，以期为较软的基材或渐变涂层提供更高的韧性，而这些渐变涂层可以更快地达到稳态摩擦值，或为整体特性提供不同的表面特性。生物相容性测试表明，Graphit-iC涂层可能是髋关节和体内其他植入物的合适表面。

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