Bio-tribological characterisation of ultra-high molecular weight polyethylene against different metal counterparts

IF 1.6 Q4 ENGINEERING, BIOMEDICAL Biosurface and Biotribology Pub Date : 2022-05-11 DOI:10.1049/bsb2.12038
Hua Xin, Haitao Liang, Lei Zhang, JunHong Jia, Xiashuang Li, Zhongmin Jin
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引用次数: 1

Abstract

Excessive wear is a key issue affecting the performance of ultra-high molecular weight polyethylene (UHMWPE)-based artificial prosthesis. This work is focussed on the bio-tribology behaviours of UHMWPE when mating with different metal counterparts (iron-based 316L, Co-based Stellite-S21 and Stellite-S22). According to the ASTM F732 standard, two million cycles comparative wear tests were carried out under bovine serum lubrication. When coupled with S21, S22, and 316L metal counterparts, the obtained average wear factors of UHMWPE were 1.333 ± 0.192, 1.360 ± 0.160, and 1.190 ± 0.177 × 10−6 mm3/N · m, respectively. Initial surface roughness of the metal counterpart has shown an important role in controlling the volume of UHMWPE wear, especially the first one million cycles. Compared with 316L, CoCrMo-based counterparts possessed relative higher hardness and exhibited less rise in surface roughness caused by wear. For UHMWPE-on-metal bearings, random scratch, surface pit, and wear debris attachment were commonly seen, which suggested the coexistence of abrasion, third-body abrasion, and adhesion-based wear. In contrast, the metal counterpart was slightly scratched with no polymer transfer film formation. The work conducted in the present study gives useful knowledge regarding the UHMWPE-on-metal bearing design. With an intention to minimise wear, surface roughness of metal counterpart should be carefully controlled.

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超高分子量聚乙烯对不同金属对应物的生物摩擦学特性
过度磨损是影响超高分子量聚乙烯(UHMWPE)人工假体性能的关键问题。这项工作的重点是UHMWPE与不同金属材料(铁基316L、钴基Stellite-S21和Stellite-S22)配合时的生物摩擦学行为。根据ASTM F732标准,在牛血清润滑下进行了200万次循环比较磨损试验。当UHMWPE与S21、S22和316L金属材料耦合时,其平均磨损系数分别为1.333±0.192、1.360±0.160和1.190±0.177 × 10−6 mm3/N·m。金属材料的初始表面粗糙度对UHMWPE磨损量的控制具有重要作用,特别是在前一百万次循环中。与316L合金相比,cocrmo基合金的硬度相对较高,磨损引起的表面粗糙度上升较小。对于uhmwpe -金属轴承,常见的是随机划痕、表面凹坑和磨损碎屑附着,这表明磨损、第三体磨损和粘附磨损并存。相比之下,金属对应物被轻微划伤,没有聚合物转移膜形成。本研究为超高分子量聚乙烯-金属轴承设计提供了有用的知识。为了尽量减少磨损,应仔细控制金属对应物的表面粗糙度。
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来源期刊
Biosurface and Biotribology
Biosurface and Biotribology Engineering-Mechanical Engineering
CiteScore
1.70
自引率
0.00%
发文量
27
审稿时长
11 weeks
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