Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising
Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising
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DOI：
10.1016/j.jmbbm.2015.10.023
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发表时间：
2016-03-01
影响因子：
3.9
通讯作者：
Hartl, Martin
中科院分区：
文献类型：
--
作者：
Dong, Yangchun;Svoboda, Petr;Hartl, Martin
在 CoCrMo 股骨头上采用了结合微织构和等离子渗碳工艺的先进表面工程工艺，并通过尖端摆式髋关节模拟器与薄膜比色干涉仪相结合来评估其摩擦学性能。 FESEM和GDOES表明，经过双相处理后，在微观织构上形成了均匀渗层深度为10μm的无沉淀C S相。髋关节模拟器测试表明，微米尺寸织构的摩擦系数降低了20%，并且双相处理CoCrMo表面形成的C过饱和晶体微观结构增强了微观织构的长期摩擦性能，从而显着提高了生物摩擦耐久性。原位比色干涉测量证实纹理区域周围的最大薄膜厚度为 530 nm，这表明滑动过程中额外的润滑剂可能会提供出色的轴承寿命。 (C) 2015 Elsevier Ltd. 保留所有权利。
An advanced surface engineering process combining micro-texture with a plasma carburising process was produced on CoCrMo femoral head, and their tribological properties were evaluated by the cutting-edge pendulum hip joint simulator coupled with thin film colorimetric interferometry. FESEM and GDOES showed that precipitation-free C S-phase with a uniform case depth of 10 mu m was formed across the micro-textures after duplex treatment. Hip simulator tests showed that the friction coefficient was reduced by 20% for micro-metre sized texture, and the long-term tribological property of microtexture was enhanced by the C-supersaturated crystalline microstructure formed on the surface of duplex treated CoCrMo, thereby enhancing biotribological durability significantly. In-situ colorimetric interferometry confirmed that the maximum film thickness around texture area was 530 nm, indicating that the additional lubricant during sliding motion might provide exceptional bearing life. (C) 2015 Elsevier Ltd. All rights reserved.