{"title":"Abrassion by impurities in MoS2 Part 2 — practical tests and the development of a quality control","authors":"J.P. Giltrow","doi":"10.1016/0041-2678(74)90023-2","DOIUrl":"10.1016/0041-2678(74)90023-2","url":null,"abstract":"<div><p>Wear of two types of practical mechanisms, bearings and chains, lubricated by dispersions of molybdenum disulphide (MoS<sub>2</sub>) powders in mineral oil has been assessed. A close correlation between wear in the two tests is observed and at light loads all samples of MoS<sub>2</sub> examined results in greater abrasion than clean oil alone. The absence of any general correlation between the abrasiveness of MoS<sub>2</sub> powders in practical tests and their silica (SiO<sub>2</sub>) contents, and the severe forms of bearing damage which are observed, reaffirm the need for a method of direct control over the abrasiveness of these materials. Because the practical tests are far too lengthly for this purpose, an accelerated test has been developed to that end.</p></div>","PeriodicalId":39768,"journal":{"name":"Mocaxue Xuebao/Tribology","volume":"7 4","pages":"Pages 161-168"},"PeriodicalIF":0.0,"publicationDate":"1974-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-2678(74)90023-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73522217","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}
{"title":"Performance testing of lubricants for automotive engines and transmissions","authors":"","doi":"10.1016/0041-2678(74)90025-6","DOIUrl":"https://doi.org/10.1016/0041-2678(74)90025-6","url":null,"abstract":"","PeriodicalId":39768,"journal":{"name":"Mocaxue Xuebao/Tribology","volume":"7 4","pages":"Page 180"},"PeriodicalIF":0.0,"publicationDate":"1974-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-2678(74)90025-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137060862","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}
{"title":"The lubricating mechanism of di-u-thio-dithio-bis (diethyldithiocarbamate) dimolybdenum during extreme pressure lubrication","authors":"H. Isoyama, T. Sakurai","doi":"10.1016/0041-2678(74)90022-0","DOIUrl":"10.1016/0041-2678(74)90022-0","url":null,"abstract":"<div><p>The mechanisms of the pyrolysis of molybdenum diethyldithiocarbamate and sulphurized molybdenum diethyldithiocarbamate were investigated. The performances, as lubricants, of the molybdenum compounds blended in the grease, and a mixture of elementary sulphur with MoS<sub>2</sub> suspended in oil were compared using a Shell four-ball machine. The mechanisms of ep and anti-wear behaviour of molybdenum compounds were investigated by examining the wear scars using an electron probe microanalyzer and electron diffraction.</p></div>","PeriodicalId":39768,"journal":{"name":"Mocaxue Xuebao/Tribology","volume":"7 4","pages":"Pages 151-160"},"PeriodicalIF":0.0,"publicationDate":"1974-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-2678(74)90022-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72905670","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}
{"title":"The tribology of wheel on rail","authors":"F.T. Barwell","doi":"10.1016/0041-2678(74)90021-9","DOIUrl":"10.1016/0041-2678(74)90021-9","url":null,"abstract":"<div><p>The functioning of wheels and rails as a supporting and guiding system depends on a Hertzian contact of 1.2 × 10<sup>−4</sup> m<sup>2</sup> (0.2 in<sup>2</sup>) area. In addition to its supporting function, this area must withstand tangential forces to enable the functions of traction, braking and guidance to be fulfilled. Such traction forces are accompanied by a deflection known as ‘creep’ and classical estimates of this quantity are compared with measurements made on the track. Modes of wear of wheel and rail are described and alternative systems which avoid contact are discussed.</p></div>","PeriodicalId":39768,"journal":{"name":"Mocaxue Xuebao/Tribology","volume":"7 4","pages":"Pages 146-150"},"PeriodicalIF":0.0,"publicationDate":"1974-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-2678(74)90021-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53588075","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}