中国有色金属学会会刊(英文版)
中國有色金屬學會會刊(英文版)
중국유색금속학회회간(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2003年
6期
1274-1279
,共6页
杜温文%孙扬善%闵学刚%薛烽%武登云
杜溫文%孫颺善%閔學剛%薛烽%武登雲
두온문%손양선%민학강%설봉%무등운
magnesium alloy%Mg17 Al12%calcium%valence electron structure
The alloy AZ91 containing calcium was prepared under protection of a mixed gas atmosphere of SF6(1%,volume fraction)and CO2.The added calcium mainly dissolves into the Mg17 Al12 phase in the alloy and increases its melting point and the thermal stability.The empirical electron theory(EET)of solid and molecules was used to calculate the valence electron structures(VES)of Mg17 Al12 phase with different amounts of calcium additions.The theoretical calculations indicate that calcium dissolved in Mg17 Al12 phase increases the strengths of atomic bonds that control the thermal stability of Mg17 Al12 phase,and also makes the distribution of valence electrons on the dominant bond network as well as in the whole unit cell of Mg17 Al12 more uniform,which are consistent with the experimental results.
