{"title":"Direct TEM observation of the welding of asperities between two single crystal gold films","authors":"Chan Siu-Wai","doi":"10.1109/33.19010","DOIUrl":null,"url":null,"abstract":"The information of grain boundaries between two gold films in contact was directly observed on a hot stage in a transmission electron microscope at a temperature that was less than 0.4 of the gold melting point. This is believed to be the first direct evidence of metal-to-metal welding by the formation of grain boundaries at touching asperities. These welds can contribute to the frictional force of a sliding contact because grain boundaries of pure metals have the same mechanical strength as the bulk of the material. In addition, shear deformation of these joined asperities can contribute to the adhesive wear in sliding. This would be relevant to the gold alloys used in electrical sliding contacts. The experimental results are reported in detail.<<ETX>>","PeriodicalId":191800,"journal":{"name":"Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on Electrical Contacts","volume":"55 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrical Contacts, 1988., Proceedings of the Thirty Fourth Meeting of the IEEE Holm Conference on Electrical Contacts","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/33.19010","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
The information of grain boundaries between two gold films in contact was directly observed on a hot stage in a transmission electron microscope at a temperature that was less than 0.4 of the gold melting point. This is believed to be the first direct evidence of metal-to-metal welding by the formation of grain boundaries at touching asperities. These welds can contribute to the frictional force of a sliding contact because grain boundaries of pure metals have the same mechanical strength as the bulk of the material. In addition, shear deformation of these joined asperities can contribute to the adhesive wear in sliding. This would be relevant to the gold alloys used in electrical sliding contacts. The experimental results are reported in detail.<>
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