{"title":"液相烧结W-Mo-Ni-Fe合金的晶粒生长","authors":"P.B. Kemp , R.M. German","doi":"10.1016/0022-5088(91)90022-V","DOIUrl":null,"url":null,"abstract":"<div><p>Previous observations have shown smaller grain sizes and higher strengths in W-Ni-Fe heavy alloys containing molybdenum. This study focuses on the microstructure and grain growth kinetics for the W-Mo-Ni-Fe system processed at 1500 °C. The initial rate of grain growth follows an approximate square root time dependence in contrast to the cube root dependence typical for W-Ni-Fe alloys. Microprobe measurements show that chemical gradients are present in the solid grains, with high molybdenum content cores. The retarded grain growth from molybdenum additions is the result of a decreased tungsten solubility in the liquid during the early stages of sintering.</p></div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90022-V","citationCount":"42","resultStr":"{\"title\":\"Grain growth in liquid-phase-sintered W-Mo-Ni-Fe alloys\",\"authors\":\"P.B. Kemp , R.M. German\",\"doi\":\"10.1016/0022-5088(91)90022-V\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Previous observations have shown smaller grain sizes and higher strengths in W-Ni-Fe heavy alloys containing molybdenum. This study focuses on the microstructure and grain growth kinetics for the W-Mo-Ni-Fe system processed at 1500 °C. The initial rate of grain growth follows an approximate square root time dependence in contrast to the cube root dependence typical for W-Ni-Fe alloys. Microprobe measurements show that chemical gradients are present in the solid grains, with high molybdenum content cores. The retarded grain growth from molybdenum additions is the result of a decreased tungsten solubility in the liquid during the early stages of sintering.</p></div>\",\"PeriodicalId\":17534,\"journal\":{\"name\":\"Journal of The Less Common Metals\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0022-5088(91)90022-V\",\"citationCount\":\"42\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of The Less Common Metals\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/002250889190022V\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Less Common Metals","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/002250889190022V","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Grain growth in liquid-phase-sintered W-Mo-Ni-Fe alloys
Previous observations have shown smaller grain sizes and higher strengths in W-Ni-Fe heavy alloys containing molybdenum. This study focuses on the microstructure and grain growth kinetics for the W-Mo-Ni-Fe system processed at 1500 °C. The initial rate of grain growth follows an approximate square root time dependence in contrast to the cube root dependence typical for W-Ni-Fe alloys. Microprobe measurements show that chemical gradients are present in the solid grains, with high molybdenum content cores. The retarded grain growth from molybdenum additions is the result of a decreased tungsten solubility in the liquid during the early stages of sintering.
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