Lionel Simo Kamga, Thanh D Nguyen, Thomas Schmidt, M. Gedan-Smolka, S. Emrich, M. Oehler, B. Sauer, M. Kopnarski
In dry-lubricated tribological systems, polytetrafluoroethylene (PTFE) or polyamide (PA) are often used as dry lubricants. PTFE is characterized by a low coefficient of friction and a high wear rate when sliding against steel and a high temperature resistance. In contrast to PTFE, PA has a higher coefficient of friction when sliding against steel. The radiation modification of PTFE in air generates functional groups (-COF and -COOH) and persistent perfluoroalkyl (peroxy) radicals, which, when chemically coupled with suitable polymers, lead to compounds with improved tribological properties. In this paper, the mechanical and tribological properties of PA46-PTFE-cb (chemical bonded) that were kept by reactive extrusion were characterized. For this purpose, Block-on-ring tests were performed using hardened steel discs made of 16MnCr5 as counterparts.
{"title":"Einfluss einer chemischen Kopplung von strahlenmodifiziertem PTFE mit PA46 auf mechanische Eigenschaften und das Reib- und Verschleißverhalten","authors":"Lionel Simo Kamga, Thanh D Nguyen, Thomas Schmidt, M. Gedan-Smolka, S. Emrich, M. Oehler, B. Sauer, M. Kopnarski","doi":"10.24053/tus-2021-0011","DOIUrl":"https://doi.org/10.24053/tus-2021-0011","url":null,"abstract":"In dry-lubricated tribological systems, polytetrafluoroethylene (PTFE) or polyamide (PA) are often used as dry lubricants. PTFE is characterized by a low coefficient of friction and a high wear rate when sliding against steel and a high temperature resistance. In contrast to PTFE, PA has a higher coefficient of friction when sliding against steel. The radiation modification of PTFE in air generates functional groups (-COF and -COOH) and persistent perfluoroalkyl (peroxy) radicals, which, when chemically coupled with suitable polymers, lead to compounds with improved tribological properties. In this paper, the mechanical and tribological properties of PA46-PTFE-cb (chemical bonded) that were kept by reactive extrusion were characterized. For this purpose, Block-on-ring tests were performed using hardened steel discs made of 16MnCr5 as counterparts.","PeriodicalId":53690,"journal":{"name":"Tribologie und Schmierungstechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42067348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Felix Harden, Birgit Schädel, Roland Kral, Leonard Siebert, R. Adelung, O. Jacobs
For industrial applications, additive manufacturing becomes more and more important due to its unrivaled design and materials freedom. In this light, additively manufactured polymer-polymer sliding combinations gain increasing interest for manifold tribological applications. This potential can be fully exploited, e.g., by using tribologically tailored compounds. For additive manufacturing not only the sliding combinations but also the understanding of the influence of printing parameters are important. Thus, this work is a first investigation of commercially available tribological compounds regarding their wear behavior by means of the ball-prism wear test. On that basis, influences of printing orientation and material combination on the wear behavior are investigated. In addition, interactions of these parameters will be discussed. Finally, the challenges of test specimen production as well as wear measurements are considered.
{"title":"Verschleißverhalten von additiv gefertigten Kunststoff-Kunststoff-Gleitpaarungen","authors":"Felix Harden, Birgit Schädel, Roland Kral, Leonard Siebert, R. Adelung, O. Jacobs","doi":"10.24053/tus-2021-0010","DOIUrl":"https://doi.org/10.24053/tus-2021-0010","url":null,"abstract":"For industrial applications, additive manufacturing becomes more and more important due to its unrivaled design and materials freedom. In this light, additively manufactured polymer-polymer sliding combinations gain increasing interest for manifold tribological applications. This potential can be fully exploited, e.g., by using tribologically tailored compounds. For additive manufacturing not only the sliding combinations but also the understanding of the influence of printing parameters are important. Thus, this work is a first investigation of commercially available tribological compounds regarding their wear behavior by means of the ball-prism wear test. On that basis, influences of printing orientation and material combination on the wear behavior are investigated. In addition, interactions of these parameters will be discussed. Finally, the challenges of test specimen production as well as wear measurements are considered.","PeriodicalId":53690,"journal":{"name":"Tribologie und Schmierungstechnik","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43615255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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