Scholarlink

<p>Micro-textured zirconium–niobium alloy (Zr-2.5Nb) femoral heads promise longer-lasting hip implants, yet the geometric rules that minimize friction remain unclear. We investigated how micro-milled groove width, spacing and depth influence wettability and tribological performance under simulated physiological conditions. Orthogonal milling experiments were designed to fabricate grooves with varying parameters (width, spacing, depth), followed by friction testing. Results demonstrate that micro-milling successfully produced well-defined, dimensionally precise micro-grooves on Zr-2.5Nb surfaces. Contact-angle measurements revealed that all textures increase hydrophilicity; the optimum geometry (200&#xa0;μm width, 300&#xa0;μm spacing, 20&#xa0;μm depth) reduced the static contact angle from 52.4° to 31.9°, a 39.03% improvement. Reciprocating ball-on-flat tests in simulated body fluid gave a steady-state friction coefficient of 0.191 for the optimum texture versus 0.238 for the untextured control, a 19.6% reduction. Analysis of variance ranked groove width &gt; spacing &gt; depth. This represents a synergistic enhancement in both wettability and tribological performance, offering valuable insights for the surface engineering of medical-grade Zr-2.5Nb alloys. </p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on the Influence of Micro-Groove Texturing Parameters on Friction Characteristics of Zr-2.5Nb Artificial Joint Surfaces Based on Micro-Milling

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • Xin Zhao,
  • Ziyang Cao,
  • Wenjie Mei,
  • Pengkai Cai,
  • Qiang Wu

摘要

Micro-textured zirconium–niobium alloy (Zr-2.5Nb) femoral heads promise longer-lasting hip implants, yet the geometric rules that minimize friction remain unclear. We investigated how micro-milled groove width, spacing and depth influence wettability and tribological performance under simulated physiological conditions. Orthogonal milling experiments were designed to fabricate grooves with varying parameters (width, spacing, depth), followed by friction testing. Results demonstrate that micro-milling successfully produced well-defined, dimensionally precise micro-grooves on Zr-2.5Nb surfaces. Contact-angle measurements revealed that all textures increase hydrophilicity; the optimum geometry (200 μm width, 300 μm spacing, 20 μm depth) reduced the static contact angle from 52.4° to 31.9°, a 39.03% improvement. Reciprocating ball-on-flat tests in simulated body fluid gave a steady-state friction coefficient of 0.191 for the optimum texture versus 0.238 for the untextured control, a 19.6% reduction. Analysis of variance ranked groove width > spacing > depth. This represents a synergistic enhancement in both wettability and tribological performance, offering valuable insights for the surface engineering of medical-grade Zr-2.5Nb alloys.