Modification of Tribotechnical Properties of Carbon Composites by the Laser Surface Treatment Method

IF 0.5 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Friction and Wear Pub Date : 2024-07-03 DOI:10.3103/S1068366624700053

A. G. Shpenev, P. O. Bukovskii, O. O. Shcherbakova, T. I. Muravyeva, V. N. Androsenko, M. A. Kotov, N. G. Solovyev, M. Yu. Yakimov, A. Yu. Krivosheev

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Abstract

The study of the structure and tribotechnical characteristics of composite material based on polyacrylonitrile (PAN) carbon fabric and a matrix obtained by the vapor deposition method has been carried out. One of the samples of the investigated material was subjected to laser treatment, with local laser heating of the surface layer to 2800–3000°C. The other composite sample was heat treated at a temperature T > 2000°C. Tribotechnical tests were carried out and values of friction and wear coefficients were obtained in the pair with steel and ceramic counterbodies. In order to determine the peculiarities of friction and wear mechanisms of modified materials, the surface of composites after friction was investigated by scanning electron microscopy with X-ray spectral analysis. It was found that laser treatment significantly improves antifriction properties of carbon composite paired with a steel counterbody (friction coefficient reduction by two times, wear reduction by three times). It is revealed that such treatment significantly changes the nature of the third body film (TB) formed on the friction surface of composites paired with steel. No elements of the counterbody material are detected in the composition of the film, which indicates its minimal wear during the friction process. The TB film itself becomes thicker and denser, completely covering the surface of the composite. This allows it to exhibit solid lubricant and anti-wear properties to a greater extent, improving the tribological characteristics of the composite.

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用激光表面处理方法改变碳复合材料的摩擦学特性

摘要对基于聚丙烯腈（PAN）碳纤维织物和气相沉积法获得的基体的复合材料的结构和摩擦技术特性进行了研究。其中一个样品经过激光处理，表层局部激光加热至 2800-3000°C。另一个复合材料样品在 2000°C 的温度下进行了热处理。进行了摩擦技术测试，得出了与钢和陶瓷对体的摩擦系数和磨损系数。为了确定改性材料摩擦和磨损机理的特殊性，通过扫描电子显微镜和 X 射线光谱分析对摩擦后的复合材料表面进行了研究。研究发现，激光处理可显著提高碳复合材料与钢制基体配对的抗摩擦性能（摩擦系数降低两倍，磨损降低三倍）。结果表明，这种处理方法极大地改变了与钢配对的复合材料摩擦表面上形成的第三体膜（TB）的性质。在薄膜的成分中检测不到对体材料的元素，这表明其在摩擦过程中的磨损极小。TB 薄膜本身变得更厚、更致密，完全覆盖了复合材料的表面。这使其在更大程度上表现出固体润滑和抗磨损特性，从而改善了复合材料的摩擦学特性。

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来源期刊

Journal of Friction and Wear ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Journal of Friction and Wear is intended to bring together researchers and practitioners working in tribology. It provides novel information on science, practice, and technology of lubrication, wear prevention, and friction control. Papers cover tribological problems of physics, chemistry, materials science, and mechanical engineering, discussing issues from a fundamental or technological point of view.