{"title":"Positron lifetime studies on the recovery of plastically deformed silver: the influence of oxygen","authors":"D. Wegner","doi":"10.1088/0305-4608/18/10/018","DOIUrl":null,"url":null,"abstract":"The recovery of silver cold-worked at room temperature was investigated by means of positron lifetime spectroscopy. At temperatures between 370 K and 470 K, a recovery stage occurs which is indicated by the decrease of a long lifetime ( tau 2=190(3)ps) intensity. In contrast to vacuum-annealed silver, the samples heated in an oxygen atmosphere exhibit an antirecovery stage above the solubility temperature of oxygen in silver: the intensity of tau 2 reincreases to some 80% above T approximately=500 K. This stage is attributed to the trapping of recrystallisation-induced vacancies at impurity oxygen molecules. To some extent, these complexes are thermally stable up to 1070 K.","PeriodicalId":16828,"journal":{"name":"Journal of Physics F: Metal Physics","volume":"107 1-2","pages":"2291-2302"},"PeriodicalIF":0.0000,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics F: Metal Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/0305-4608/18/10/018","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
The recovery of silver cold-worked at room temperature was investigated by means of positron lifetime spectroscopy. At temperatures between 370 K and 470 K, a recovery stage occurs which is indicated by the decrease of a long lifetime ( tau 2=190(3)ps) intensity. In contrast to vacuum-annealed silver, the samples heated in an oxygen atmosphere exhibit an antirecovery stage above the solubility temperature of oxygen in silver: the intensity of tau 2 reincreases to some 80% above T approximately=500 K. This stage is attributed to the trapping of recrystallisation-induced vacancies at impurity oxygen molecules. To some extent, these complexes are thermally stable up to 1070 K.
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