Wear Mechanism and Wear Debris Characterization of ULWPE in Multidirectional Motion

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-11-04 DOI:10.1007/s11249-024-01928-3

Ruijuan Liu, Yali Zhang, Jian Pu, Maoyan Jie, Qin Xiong, Xiaogang Zhang, Xinle Li, Zhongmin Jin

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Abstract

Ultralow-wear polyethylene (ULWPE) was proposed to replace conventional UHMWPE as an artificial joint material. Different molecular weights of ULWPE, ULWPE-200, ULWPE-300, and ULWPE-700 were examined against CrCoMo compared to conventional UHMWPE in multidirectional motion. The wear mechanism was elucidated from the perspective of macroscopic wear behavior and microscopic wear debris characterization. It was found that the morphologies of the ULWPE worn surface were similar to that of UHMWPE, with scratches, burnishing, and protuberances. ULWPE-700 possessed the lowest wear loss at all loading conditions, and the wear loss was 40.3% lower than that of UHMWPE at 3 MPa. Furthermore, wear debris was consistent in morphology and size range but showed differences in quantity, size distribution, and shape distribution. Combined with the wear surface morphology and wear debris analysis, it showed that plastic deformation was the main cause of wear debris formation and the wear mechanisms were adhesive wear and abrasive wear. Moreover, the FBA of ULWPE-700 was 64% lower than that of UHMWPE at 3 MPa, suggesting that ULWPE-700 wear debris had the lowest potential osteolysis. This study provides deeper insight into the bio-tribological behavior and the potential biological activity of ULWPE as an artificial joint material.

Graphical Abstract

Abstract Image

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超低分子量聚乙烯在多向运动中的磨损机理和磨损碎片表征

有人提出用超低磨损聚乙烯（ULWPE）取代传统的超高分子量聚乙烯（UHMWPE）作为人工关节材料。与传统的超高分子量聚乙烯相比，在多向运动中对不同分子量的 ULWPE、ULWPE-200、ULWPE-300 和 ULWPE-700 与 CrCoMo 进行了测试。从宏观磨损行为和微观磨损碎片特征的角度阐明了磨损机理。研究发现，ULWPE 磨损表面的形态与超高分子量聚乙烯相似，都有划痕、烧伤和突起。在所有加载条件下，ULWPE-700 的磨损损耗最小，在 3 兆帕时，磨损损耗比超高分子量聚乙烯低 40.3%。此外，磨损碎屑的形态和尺寸范围一致，但在数量、尺寸分布和形状分布方面存在差异。结合磨损表面形态和磨损碎屑分析表明，塑性变形是磨损碎屑形成的主要原因，磨损机理为粘着磨损和磨料磨损。此外，在 3 兆帕时，ULWPE-700 的 FBA 比超高分子量聚乙烯低 64%，这表明 ULWPE-700 磨损碎片的潜在溶骨率最低。这项研究有助于深入了解 ULWPE 作为人工关节材料的生物组织行为和潜在生物活性。图文摘要

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.