Effect of Cu on the Spinodal Decomposition of AlZn Alloy with Symmetrical Composition  

作　　者：Shiming HAO+, Yuping REN, Hongxiao LI, Dapeng WANG and Gang ZHAOCollege of Materials and Metallurgy, Northeastern University, Shenyang 110004, China 

出　　处：《Journal of Materials Science & Technology》2005年第6期836-840,共5页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China under grant No.59971015;supported by the Laboratory of Atom Imaging of Solids,Institute of Metal Research,the Chinese Academy of Sciences.

摘　　要：The effect of Cu addition on the spinodal decomposition of the Al-Zn alloy with symmetrical compositions has been investigated by X-ray diffraction analysis. It is found that the single fcc phase can be obtained in the AlZn alloy with the addition of 2 at. pct Cu after solution treatment at 400℃ and water quenching to room temperature. The modulation structure occurs in two types of alloys aged at room temperature for 30 min. The spinodal process remarkably slows down above or at the three phase equilibrium temperature, particularly at room temperature due to the addition of 2 at. pct Cu. The spinodal time increases by 20 times when aging at 300℃ and by more than 30 times when aging at room temperature.The effect of Cu addition on the spinodal decomposition of the Al-Zn alloy with symmetrical compositions has been investigated by X-ray diffraction analysis. It is found that the single fcc phase can be obtained in the AlZn alloy with the addition of 2 at. pct Cu after solution treatment at 400℃ and water quenching to room temperature. The modulation structure occurs in two types of alloys aged at room temperature for 30 min. The spinodal process remarkably slows down above or at the three phase equilibrium temperature, particularly at room temperature due to the addition of 2 at. pct Cu. The spinodal time increases by 20 times when aging at 300℃ and by more than 30 times when aging at room temperature.

关 键 词：Al-Zn（-Cu） alloy Spinodal decomposition Lattice parameter X-ray diffraction 

分 类 号：TG113[金属学及工艺—物理冶金]