Tribochemical reactions occurring on the friction surface of the composites based on polytetrafluoroethylene containing layered silicates

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Bulletin of Materials Science Pub Date : 2025-05-08 DOI:10.1007/s12034-025-03427-0

Iuliia V Kapitonova, Praskovia N Tarasova, Sakhayana N Danilova, Nadezhda N Lazareva, Aitalina A Okhlopkova

{"title":"Tribochemical reactions occurring on the friction surface of the composites based on polytetrafluoroethylene containing layered silicates","authors":"Iuliia V Kapitonova, Praskovia N Tarasova, Sakhayana N Danilova, Nadezhda N Lazareva, Aitalina A Okhlopkova","doi":"10.1007/s12034-025-03427-0","DOIUrl":null,"url":null,"abstract":"<div><p>The processes occurring on the friction surface of polymer composite materials (PCMs) based on polytetrafluoroethylene (PTFE) and layered (LS) silicates such as serpentine and phlogopite are described in the article. The studies were carried out with a scanning electron microscope and X-ray photoelectron microscopy and indicated the occurrence of tribo-oxidative processes in the polymer/metal contact zone. The investigation of the elemental composition of the friction surface by energy dispersive analysis revealed the appearance of new peaks corresponding to Fe and Cr. This fact indicates the interaction of the counterbody metal with the polymer during friction. The occurrence of defluorination and hydroxylation reactions of PTFE macromolecules on the friction surface of PCM was recorded based on the results of X-ray photoelectron spectroscopy. A possible mechanism is proposed for the tribochemical processes that occur on the friction surface of composites, regardless of the composition of the fillers. It has been established that a protective layer is formed consisting of filler particles and tribodestruction products due to tribochemical reactions on the friction surface. The formation of a secondary layer is not observed in the case of a composite with phlogopite. Thus, the main factor in increasing the wear resistance of PTFE-based PCM is the formation of new secondary structures on the friction surface in the friction zone due to the occurrence of tribo-oxidative processes. The generated secondary structures provide a protective surface that contributes to the shear friction stress.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 2","pages":""},"PeriodicalIF":1.9000,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12034-025-03427-0","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The processes occurring on the friction surface of polymer composite materials (PCMs) based on polytetrafluoroethylene (PTFE) and layered (LS) silicates such as serpentine and phlogopite are described in the article. The studies were carried out with a scanning electron microscope and X-ray photoelectron microscopy and indicated the occurrence of tribo-oxidative processes in the polymer/metal contact zone. The investigation of the elemental composition of the friction surface by energy dispersive analysis revealed the appearance of new peaks corresponding to Fe and Cr. This fact indicates the interaction of the counterbody metal with the polymer during friction. The occurrence of defluorination and hydroxylation reactions of PTFE macromolecules on the friction surface of PCM was recorded based on the results of X-ray photoelectron spectroscopy. A possible mechanism is proposed for the tribochemical processes that occur on the friction surface of composites, regardless of the composition of the fillers. It has been established that a protective layer is formed consisting of filler particles and tribodestruction products due to tribochemical reactions on the friction surface. The formation of a secondary layer is not observed in the case of a composite with phlogopite. Thus, the main factor in increasing the wear resistance of PTFE-based PCM is the formation of new secondary structures on the friction surface in the friction zone due to the occurrence of tribo-oxidative processes. The generated secondary structures provide a protective surface that contributes to the shear friction stress.

查看原文本刊更多论文

含层状硅酸盐的聚四氟乙烯基复合材料摩擦表面发生的摩擦化学反应

本文描述了聚四氟乙烯（PTFE）和层状硅酸盐（LS）如蛇纹石和云母等聚合物复合材料（PCMs）摩擦表面发生的过程。通过扫描电子显微镜和x射线光电子显微镜进行了研究，发现在聚合物/金属接触区发生了摩擦氧化过程。通过对摩擦表面元素组成的能量色散分析，发现了Fe和Cr对应的新峰的出现，这一事实表明在摩擦过程中对体金属与聚合物的相互作用。利用x射线光电子能谱记录了聚四氟乙烯大分子在PCM摩擦表面发生的脱氟和羟基化反应。提出了发生在复合材料摩擦表面的摩擦化学过程的可能机制，而不考虑填料的组成。已经确定，由于摩擦表面的摩擦化学反应，由填充颗粒和摩擦破坏产物组成的保护层。在与绿云母的复合材料的情况下，未观察到第二层的形成。因此，提高ptfe基PCM耐磨性的主要因素是摩擦区摩擦表面由于摩擦氧化过程的发生而形成新的二级结构。生成的次级结构提供了一个保护表面，有助于产生剪切摩擦应力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.