Xu Xiuguang, Li Guangqiang, Yu Hualong, Wang Changzhen
{"title":"Thermodynamic studies of La(FexAl1−x)13 alloys","authors":"Xu Xiuguang, Li Guangqiang, Yu Hualong, Wang Changzhen","doi":"10.1016/0022-5088(91)90012-S","DOIUrl":null,"url":null,"abstract":"<div><p>The Invar alloy La(Fe<sub>x</sub>Al<sub>x−1</sub>)<sub>13</sub> with NaZn<sub>13</sub>-type cubic structure was prepared. Using single crystals of CaF<sub>2</sub> as solid electrolyte, the activity and the relative partial molar Gibbs free energy of lanthanum in La(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>13</sub> alloys were determined by the e.m.f. method over the temperature range 983–1085 K. The melting point and the phase transition temperature of two La(Fe<sub>x</sub>Al<sub>1−x</sub>)<sub>13</sub> alloys were measured by differential thermal analysis. The average molar heat capacity was measured using a high temperature microcalorimeter in the temperature range 416–610 K.</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)90012-S","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Less Common Metals","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/002250889190012S","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
The Invar alloy La(FexAlx−1)13 with NaZn13-type cubic structure was prepared. Using single crystals of CaF2 as solid electrolyte, the activity and the relative partial molar Gibbs free energy of lanthanum in La(FexAl1−x)13 alloys were determined by the e.m.f. method over the temperature range 983–1085 K. The melting point and the phase transition temperature of two La(FexAl1−x)13 alloys were measured by differential thermal analysis. The average molar heat capacity was measured using a high temperature microcalorimeter in the temperature range 416–610 K.
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