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在不同负荷下,纳米颗粒填充的聚四乙烯复合材料的tribological和机械化学性质

Weixuan Lv^1,2, Tingmei Wang^1,2, Qihua Wang^1,2

¹State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.

|April 13, 2024

概括

聚四乙烯 (PTFE) 复合材料与 (α-Al2O3) 或 (SiO2) 纳米粒子显示出良好的耐磨性. /PTFE形成了一个更厚,更稳定的 tribofilm,提高了高压下的性能.

科学领域:

材料科学材料科学材料科学
部落学 (tribology) 是一个学科.
聚合物科学聚合物科学

背景情况:

聚四乙烯 (PTFE) 的纳米粒子修饰对于增强三元学性质至关重要.
了解在不同负载下填充PTFE的 tribofilm形成和演变对于材料的寿命至关重要.

研究的目的:

为了研究充满α-Al2O3和SiO2纳米粒子的PTFE复合材料的tribological行为和tribufilm特性.
建立机械强度,tribological性能和tribofilm特性之间的关系.
为长期应用聚合物滑材料提供科学数据.

主要方法:

滑动磨损测试对α-Al2O3 / PTFE和SiO2 / PTFE复合材料在1MPa至10MPa负荷下对钢进行了滑动磨损测试.
在Tribofilm分析中使用了富里埃变换红外光谱法 (FTIR),X射线光电子光谱法 (XPS) 和聚焦离子束传输电子显微镜 (FIB-TEM).

主要成果:

这两种复合材料均表现出良好的耐磨性,在1MPa至10MPa之间.
与SiO2/PTFE相比,α-Al2O3/PTFE显示出更高的性能稳定性.
α-Al2O3/PTFE形成了一个更厚的 (100-200 nm) 岛屿式 tribofilm,而SiO2/PTFE形成了一个更薄的 (50-100 nm) 条纹 tribofilm.
α-Al2O3纳米颗粒促进了更厚,更均,更强强地粘附的 tribofilm 的形成.

结论:

纳米粒子的 tribochemistry 显著影响 tribofilm 厚度和微观结构.
α-Al2O3纳米颗粒的凝聚作用导致增强的 tribofilm 形成和提高 PTFE 复合材料的耐磨性.
这项研究为优化聚合物滑材料提供了理论指导.

关键词:

负载负载负载负载负载负载.纳米颗粒是一种纳米粒子.聚四乙烯 (PET) 是一种聚四乙烯 (PET) 的一种.带有 tribofilm 的电影.

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