Tribologia: Finnish Journal of Tribology最新文献_第7页

EVALUATION OF POSSIBILITIES TO IMPROVE FUNCTIONALITYOF BRAKE PADS THROUGH MODIFICATION OF THE HEATDISSIPATION METHOD 通过改进散热方法来改进刹车片功能的可能性评估

Tribologia: Finnish Journal of Tribology Pub Date : 2022-07-29 DOI: 10.5604/01.3001.0015.9729

W. Tuszyński, R. Moszumański, Marek Steinhof

{"title":"EVALUATION OF POSSIBILITIES TO IMPROVE FUNCTIONALITY\u0000OF BRAKE PADS THROUGH MODIFICATION OF THE HEAT\u0000DISSIPATION METHOD","authors":"W. Tuszyński, R. Moszumański, Marek Steinhof","doi":"10.5604/01.3001.0015.9729","DOIUrl":"https://doi.org/10.5604/01.3001.0015.9729","url":null,"abstract":"From a social perspective, providing motor vehicle users with high quality brake lining assemblies, which\u0000additionally help to prevent the braking system from overheating by dissipating heat into the atmosphere, is\u0000a matter of great importance. Overheated brakes may cause failure of the braking system and, as a result, lead\u0000to a car accident. Heat dissipation during operation helps to cool the braking system and prevent overheating.\u0000The article presents two patented brake pad structural solutions – anisotropic and ventilated brake pads –\u0000designed to boost the effectiveness of heat dissipation. The tests described in the article were performed\u0000using the T-33 inertia dynamometer developed at the Łukasiewicz – Institute for Sustainable Technologies in\u0000response to a demand presented by a Polish brake pad manufacturer. As part of the tests, various functional\u0000properties of the newly-designed and classic brake pads (i.e. the friction coefficient, the temperature of the\u0000brake pad, and the wear of the brake pad and brake disc) were compared.\u0000From the tests it follows that the new pads with the heat dissipation system have an advantage over classic\u0000pads, depending on the method of brake pad’s material and structural modification.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81925765","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}

引用次数: 0

EFFECTS OF RARE-EARTH METAL OXIDESON THE TRIBOLOGICAL PROPERTIES OF PADDINGSFOR USE ON MINING MACHINE PARTS 稀土金属氧化物对矿山机械零件衬垫摩擦学性能的影响

Tribologia: Finnish Journal of Tribology Pub Date : 2022-07-29 DOI: 10.5604/01.3001.0015.9720

J. Kasińska, M. Madej, Sławomir Rutkowski

引用次数: 0

Influence of a steel substrate surface roughnessON THE MECHANICAL PROPERTIES OF A PEEK COATINGDEPOSITED WITH THE ELECTROPHORETIC METHOD 钢基体表面粗糙度对电泳法沉积PEEK涂层力学性能的影响

Tribologia: Finnish Journal of Tribology Pub Date : 2022-07-29 DOI: 10.5604/01.3001.0015.9721

M. Otto, Aleksandra Fiołek, S. Zimowski

{"title":"Influence of a steel substrate surface roughness\u0000ON THE MECHANICAL PROPERTIES OF A PEEK COATING\u0000DEPOSITED WITH THE ELECTROPHORETIC METHOD","authors":"M. Otto, Aleksandra Fiołek, S. Zimowski","doi":"10.5604/01.3001.0015.9721","DOIUrl":"https://doi.org/10.5604/01.3001.0015.9721","url":null,"abstract":"The mechanical properties, adhesion and roughness of polymer coatings depend on many factors, including\u0000the unevenness of the substrate surface. Nevertheless, the influence of the substrate surface roughness is\u0000related to the coating type and substrate material and the used deposition method. Therefore, the effect\u0000of the surface roughness of a structural steel substrate on the mechanical properties of a PEEK coating is\u0000ambiguous. The indentation tests conducted show that, at a specific load of the indenter, the roughness of the\u0000steel substrate surface does not significantly affect the Vicker’s hardness of the tested PEEK coatings. The\u0000average Vicker’s hardness and elastic modulus are approximately 300 MPa and 5.6 Gpa, respectively, at the\u0000lowest of the applied loads, regardless of the surface roughness level of the steel substrate. Nevertheless, the\u0000surface roughness of the steel substrate after fine grinding of Ra = 0.21 μm, compared to the polished one with\u0000Ra = 0.005 μm, meant that adhesion improved, and the scratch hardness increased by approximately 130 to\u0000370 [MPa] of the PEEK coating.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90117714","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}

引用次数: 0

45 YEARS OF DELIBERATIONS ON THE THERMO-MECHANICALINTERPRETATION OF FRICTION AND WEARPART I – THE MACROSCOPIC INTERPRETATIONOF THE TRIBOLOGICAL PROCESS 45年来对摩擦和磨损的热力学解释的思考——摩擦学过程的宏观解释

Tribologia: Finnish Journal of Tribology Pub Date : 2022-07-29 DOI: 10.5604/01.3001.0015.9723

Jan Sadowski

引用次数: 0

PHYSICOCHEMICAL ASPECTS OF THE WORK OF PASSENGERCAR BRAKE LININGS. Part I: THE EFFECT OF FRICTIONALADDITIVES 轿车刹车片的理化方面的工作。第一部分:摩擦添加剂的作用

Tribologia: Finnish Journal of Tribology Pub Date : 2022-07-29 DOI: 10.5604/01.3001.0015.9728

M. Szlichting, D. Bieliński, I. Jóźwik, A. Kosinska, T. Dąbrowski

{"title":"PHYSICOCHEMICAL ASPECTS OF THE WORK OF PASSENGER\u0000CAR BRAKE LININGS. Part I: THE EFFECT OF FRICTIONAL\u0000ADDITIVES","authors":"M. Szlichting, D. Bieliński, I. Jóźwik, A. Kosinska, T. Dąbrowski","doi":"10.5604/01.3001.0015.9728","DOIUrl":"https://doi.org/10.5604/01.3001.0015.9728","url":null,"abstract":"The paper presents the influence of various systems of abrasive additives which determine the performance\u0000of the friction materials of brake pads. A friction material was used for the tests, in which the base recipe was\u0000modified with various types of abrasive additives: 1. “low steel” – of low steel content, containing aluminium\u0000and chromium oxides; 2. “hybrid” – containing in addition to abrasive components from the low steel family,\u0000abrasive components such as zirconium silicate, magnesium oxide or iron oxides, which are characteristic of\u0000the family of asbestos-free organic materials (NAO); and 3. “mild hybrid” – containing abrasive components\u0000found in the friction materials of the NAO family, on the formation and structure of the so-called third body\u0000on the surface of the brake disc as a result of braking. High-resolution scanning electron microscopy with\u0000an X-ray analyser (SEM-EDS) equipped with a focus ion beam (FIB) was used to study film thickness,\u0000morphology, and chemical composition. The results of the physicochemical analysis of the third body were\u0000correlated with the results of tribological tests on a brake dynamometer adapted to the measurements of\u0000acoustic signals (NVH – noise, vibration and harshness). The tests were carried out in accordance with the\u0000SAE-J2522 procedure, commonly known as AK-Master. The obtained results confirm the important role\u0000played by the so-called third body, formed on the surface of the brake disc for safety (COF), durability (wear\u0000of friction elements) and the acoustic spectrum accompanying braking.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75525965","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}

引用次数: 1

EFFECT OF ZDDP AND FULLERENES ADDED TO PAO 8LUBRICANT ON TRIBOLOGICAL PROPERTIES OF THE SURFACELAYER OF STEEL BARE STEEL AND W-DLC COATING pao 8润滑油中添加ZDDP和富勒烯对钢、裸钢和w-dlc涂层表层摩擦学性能的影响

Tribologia: Finnish Journal of Tribology Pub Date : 2022-05-31 DOI: 10.5604/01.3001.0015.8982

J. Kowalczyk, A. Kulczycki, M. Madej, D. Ozimina

{"title":"EFFECT OF ZDDP AND FULLERENES ADDED TO PAO 8\u0000LUBRICANT ON TRIBOLOGICAL PROPERTIES OF THE SURFACE\u0000LAYER OF STEEL BARE STEEL AND W-DLC COATING","authors":"J. Kowalczyk, A. Kulczycki, M. Madej, D. Ozimina","doi":"10.5604/01.3001.0015.8982","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8982","url":null,"abstract":"The paper presents the effect of adding zinc dialkyldithiophosphate (ZDDP) and/or fullerenes on the properties\u0000of tribological systems coated with diamond-like carbon coatings doped with tungsten (W-DLC) and 100Cr6\u0000steel without coating. The tribological tests were performed using a ball-on-disc tribometer. Discs made of\u0000bare 100Cr6 steel and discs with W-DLC coating were used as samples. Balls made of 100Cr6 steel were used\u0000as counter samples. The lubricants used:poly (α) olefin oil PAO 8, PAO 8 + 1.5% of ZDDP, PAO 8+ 0.005%\u0000of C60 fullerenes and PAO 8 + 1.5% of ZDDP + 0.005% of C60 fullerenes. Observations of the W-DLC\u0000coating were carried out using a scanning microscope, and the EDS analysis enabled the identification of\u0000the chemical composition along the cross-sections of the coating. A confocal microscope operating in the\u0000interferometric mode was used to analyse the geometrical structure of the samples before and after the friction\u0000tests. Observations of the wear marks on the samples and counter-samples were also carried out using a\u0000scanning microscope, and the chemical composition on the surfaces of the friction pairs was determined. The\u0000obtained test results indicated that the PAO 8 + ZDDP + C60 lubricant caused a reduction in the coefficient of\u0000friction and the linear wear in the tested steel friction pairs. In the case of W-DLC coating, however, the ZDDP\u0000added to PAO 8 increased the resistance to motion with a simultaneous improvement in anti-wear properties.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83675874","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}

引用次数: 2

EFFECT OF HBN ON WEAR OF AlCrN-COATED SPARK PLASMA -SINTERED TiB2/Ti COMPOSITES AT TEMPERATURES UP TO 900°C HBN对alcrn涂层火花等离子烧结TiB2/Ti复合材料在900℃高温下磨损的影响

Tribologia: Finnish Journal of Tribology Pub Date : 2022-05-31 DOI: 10.5604/01.3001.0015.8756

M. Łuszcz, R. Michalczewski, M. Kalbarczyk, E. Osuch-Słomka, J. Molenda, Le Liu, M. Antonov, I. Hussainova

{"title":"EFFECT OF HBN ON WEAR OF AlCrN-COATED SPARK PLASMA -\u0000SINTERED TiB2/Ti COMPOSITES AT TEMPERATURES UP TO 900°C","authors":"M. Łuszcz, R. Michalczewski, M. Kalbarczyk, E. Osuch-Słomka, J. Molenda, Le Liu, M. Antonov, I. Hussainova","doi":"10.5604/01.3001.0015.8756","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8756","url":null,"abstract":"In this work, hexagonal boron nitride powder was used for the lubrication of an interface of TiB2/Ti composite\u0000protected by an AlCrN coating and a ceramic Si3N4 ball. The wear behaviour of this tribo-pair in an oscillating\u0000motion was studied with an SRV tribotester at the temperature range from room temperature to 900 °C. The\u0000action of hexagonal boron nitride as a solid lubricant was analysed with the use of a 3D microscopy and\u0000energy-dispersive spectroscopy. The test results confirmed that under high-temperature conditions, the use of\u0000hexagonal boron nitride as a solid lubricant does not increase the wear resistance of the TiB2/Ti composite.\u0000The use of the AlCrN coating significantly reduces wear at the temperature up to 600 °C only, while the\u0000combined use of the AlCrN coating and hBN lubrication provides effective protection against wear even at the\u0000temperature up to 900 °C. Therefore, the synergy of the anti-wear action of the coating and the solid lubricant\u0000was proved.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87390725","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}

引用次数: 1

ON THE IMPORTANT MEANING OF BIO-LIQUID DYNAMICVISCOSITY VARIATIONS IN THE LUBRICATION FLOWS 论生物液体动态粘度变化在润滑流动中的重要意义

Tribologia: Finnish Journal of Tribology Pub Date : 2022-05-31 DOI: 10.5604/01.3001.0015.8987

K. Wierzcholski, J. Gospodarczyk

{"title":"ON THE IMPORTANT MEANING OF BIO-LIQUID DYNAMIC\u0000VISCOSITY VARIATIONS IN THE LUBRICATION FLOWS","authors":"K. Wierzcholski, J. Gospodarczyk","doi":"10.5604/01.3001.0015.8987","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8987","url":null,"abstract":"The main topic of this paper refers to the numerous relations between the decrements of the dynamic viscosity\u0000of non-Newtonian bio-liquid lubricated human joints on the one hand and, on the other hand, with consequences\u0000resulting from various diseases such as low fitness and low skills of human limbs, joint unfitness, large wear\u0000of cooperating cartilage bio-surfaces. Additionally, this paper indicates the pharmacology methods performed\u0000in vivo to enhance the bio-liquid lubricant dynamic viscosity. After numerous experimental measurements,\u0000it directly follows that the collagen fibre, hyaluronate acid particle, power hydrogen ion concentration pH in\u0000lubricating bio-liquid and absorbability features of lubricated bio-surface have a direct and indirect significant\u0000influence on the bio-liquid dynamic viscosity values variations with interfacial energy distribution across\u0000the film thickness. The results presented in this paper are confirmed based on experimental measurements\u0000and analytical, numerical solutions of the load-carrying capacity, friction coefficient and bio-liquid dynamic\u0000variations performed for various human joints. These effects were simply disregarded in previous studies.\u0000The aforementioned problem has not been considered in contemporary research literature in the medical\u0000tribology domain to the Author's best knowledge. The results obtained should enable one to introduce more\u0000effective and accurate therapeutic protocols into the human joint treatment regimen. The results obtained have\u0000applications on a wide scale in spatiotemporal models in bio-tribology, biology and health science.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79567643","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}

引用次数: 1

REGRESSION USING MACHINE LEARNING AND NEURALNETWORKS FOR STUDYING TRIBOLOGICAL PROPERTIESOF WEAR-RESISTANT LAYERS 使用机器学习和神经网络的回归来研究耐磨层的摩擦学性能

Tribologia: Finnish Journal of Tribology Pub Date : 2022-05-31 DOI: 10.5604/01.3001.0015.8984

P. Malinowski, J. Kasińska

{"title":"REGRESSION USING MACHINE LEARNING AND NEURAL\u0000NETWORKS FOR STUDYING TRIBOLOGICAL PROPERTIES\u0000OF WEAR-RESISTANT LAYERS","authors":"P. Malinowski, J. Kasińska","doi":"10.5604/01.3001.0015.8984","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8984","url":null,"abstract":"Artificial intelligence is becoming commonplace in various research and industrial fields. In tribology, various\u0000statistical and predictive methods allow an analysis of numerical data in the form of tribological characteristics\u0000and surface structure geometry, to mention just two examples. With machine learning algorithms and neural\u0000network models, continuous values can be predicted (regression), and individual groups can be classified.\u0000In this article, we review the machine learning and neural networks application to the analysis of research\u0000results in a broad context. Additionally, a case study is presented for selected machine learning tools based\u0000on tribological tests of padding welds, from which the tribological characteristics (friction coefficient, linear\u0000wear) and wear indicators (maximum wear depth, wear area) were determined. The study results were used\u0000in exploratory data analysis to establish the correlation trends between selected parameters. They can also be\u0000the basis for regression analysis using machine learning algorithms and neural networks. The article presents\u0000a case study using these approaches in the tribological context and shows their ability to accurately and\u0000effectively predict selected tribological characteristics.\u0000\u0000","PeriodicalId":35004,"journal":{"name":"Tribologia: Finnish Journal of Tribology","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87399561","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}

引用次数: 0

TRIBOLOGICAL PROPERTIES OF COMPOSITE PISTON RINGSDESIGNED FOR OIL-FREE CONTACTS IN ECOLOGICALTRANSPORT 为生态运输中无油接触设计的复合活塞环的摩擦学特性

Tribologia: Finnish Journal of Tribology Pub Date : 2022-05-31 DOI: 10.5604/01.3001.0015.8986

A. Posmyk

引用次数: 0