摘要
对平衡处理(300℃～340℃)后的Al-Zn及Al-Zn加Cu合金a1相成分进行了电子探针微区分析。确定了Cu对a1+a2溶解度间隙形状，即a1/(a1+a2)边界走向的影响。该边界随着Cu含量的增加，向低Zn侧偏移，而不是此前所确定的向高Zn侧偏移。这一结果支持近年的热力学计算结果，溶解度间隙呈“隧道形”，而不支持根据实测相图推测的“钟罩形”。
The micro-composition of microstructure of alloy in low Cu side of Al-Cu-Zn ternary system was measured after isothermal equilibrium treatment at 300℃~340℃ and alloys designed and by EPMA analysis, i.e. the experimental results of 1/(1+2)boundary抯 trend. The 1/(1+2)boundary will move towards lower Zn side with the increasing of Cu content. The results are opposite with traditional phase diagrams obtained by experiments, but correspond with thermodynamic calculating results in recent years. The shape of miscibility gap shows itself as tunnel and dont like bell mantle obtained by experiment method.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2004年第5期464-467,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(50171019)
