Thermodynamic calculation of Er-X and Al-Er-X compounds existing in Al-Mg-Mn-Zr-Er alloy  

作　　者：林双平 聂祚仁 黄晖 占春耀 邢泽炳 王为 

机构地区：[1]School of Materials Science and Engineering,Beijing University of Technology

出　　处：《Transactions of Nonferrous Metals Society of China》2010年第4期682-687,共6页中国有色金属学报（英文版）

基　　金：Projects(2006AA03A207,2007AA03Z514)supported by the National High-tech Research and Development Program of China

摘　　要：Based on the Miedema model and Extended Miedema theory,the formation energies of different solute components in Er-X binary system and Al-Er-X ternary systems were calculated.The results show that the variation of erbium content has little influence on the chance rate of the formation Al-Er compound in the Al-Mg-Mn-Zr-Er system.The calculated formation energies in the Er-X binary system and Al-Er-X ternary systems indicate that Al3Er phase can take priority of depositing,Al-Er-Zr ternary compounds may also found which agrees with the experimental results in references.The consistency of calculation and experiment proves that the intermetallic compounds in the Al-Mg-Mn-Zr-Er system can be predicted directly by calculating the formation energies of the reactions in Er-X binary system and Al-Er-X ternary systems with the Miedema model and Extended Miedema theory.Based on the Miedema model and Extended Miedema theory,the formation energies of different solute components in Er-X binary system and Al-Er-X ternary systems were calculated.The results show that the variation of erbium content has little influence on the chance rate of the formation Al-Er compound in the Al-Mg-Mn-Zr-Er system.The calculated formation energies in the Er-X binary system and Al-Er-X ternary systems indicate that Al3Er phase can take priority of depositing,Al-Er-Zr ternary compounds may also found which agrees with the experimental results in references.The consistency of calculation and experiment proves that the intermetallic compounds in the Al-Mg-Mn-Zr-Er system can be predicted directly by calculating the formation energies of the reactions in Er-X binary system and Al-Er-X ternary systems with the Miedema model and Extended Miedema theory.

关 键 词：AL3ER Miedema model Extended Miedema theory formation energy 

分 类 号：TG146.21[一般工业技术—材料科学与工程]