文献类型：期刊文献

英文题名：Experimental study and thermodynamic assessment of the dysprosium-hydrogen binary system

作者：Fu, Kai[1,2];Li, Guoling[1,2];Li, Jigang[1];Liu, Yang[3];Tian, Wenhuai[2];Li, Xingguo[1]

第一作者：Fu, Kai

通讯作者：Li, XG[1];Tian, WH[2]

机构：[1]Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;[2]Univ Sci & Technol Beijing, Dept Mat Phys & Chem, 30,Xueyuan Rd, Beijing 100083, Peoples R China;[3]Beijing Union Univ, Coll Arts & Sci, Dept Food Sci, Beijing 100101, Peoples R China

第一机构：Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

通讯机构：[1]corresponding author), Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China;[2]corresponding author), Univ Sci & Technol Beijing, Dept Mat Phys & Chem, 30,Xueyuan Rd, Beijing 100083, Peoples R China.

年份：2017

卷号：696

起止页码：60-66

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20164803049394);Scopus(收录号：2-s2.0-84995947171);WOS:【SCI-EXPANDED(收录号:WOS:000391819800008)】；

基金：The authors acknowledge MOST of China (No. 2012CBA01207 ) and NSFC (No. U1201241 , 11375020 , 51431001 and 21321001 ) and Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials Science and Engineering.

语种：英文

外文关键词：Rare earth hydrides; Pressure composition isotherm; Phase diagram; Thermodynamics

摘要：The dysprosium-hydrogen (Dy-H) binary system in the full range of H/Dy = 0 to 3.0 is investigated by accurate pressure composition isotherm (PCI) measurement, including a PCI measurement of the beta-DyH2/g-DyH3 transition for the first time. The Dy/beta-DyH2 biphasic region shows well defined plateaus in the range of H/Dy = 0.41 to 1.65 at 650 degrees C and gradually shrinks to 0.54 to 1.23 at 900 degrees C, with transition enthalpy of 213.1 +/- 2.8 kJ/mol H-2. The beta-DyH2/g-DyH3 biphasic region also shows well defined plateaus from 250 degrees C to 325 degrees C, but with much narrower composition region of H/Dy from 2.3 to 2.9. The transition enthalpy is 79.3 +/- 2.2 kJ/ mol H-2. The phase diagram and thermodynamic parameters are calculated with the CALPHAD method using the measured PCI data. The obtained results are in very good agreement with our experimental data and the published data reported in literature. The results provide more comprehensive and quantitative insights into the key thermodynamic properties of the Dy-H system. (C) 2016 Elsevier B.V. All rights reserved.