TY - JOUR
T1 - Effects of heat-treatment temperature on microstructure and electrochemical properties of AB5 type MlNi 3.60Co 0.85Mn 0.40Al 0.15 hydride electrode alloy
AU - Ma, J.
AU - Pan, H.
AU - Tian, Q.
AU - Zhu, Y.
AU - Li, S.
AU - Chen, C.
PY - 2001/8
Y1 - 2001/8
N2 - The effects of heat treatment with different temperature on the microstructure and electrochemical properties of AB5 type MlNi 3.60Co 0.85Mn 0.40Al 0.15 hydride electrode alloy were studied systematically. The results show that, the microstructure of as-cast alloy is typical dendrite and that of the alloy by heat treatment with 1 273 K is unconspicuous dendrite, and after being heat treatment with 1 373 K, the microstructure of the alloy changes to columnar crystal. As compared with as-cast alloy, after being heat-treated by 1 273 K, the activation characteristics decrease and the electrochemical stability improves, while both electrochemical capacity and high-rate dischargeability almost unchange; after being heat-treated by 1 373 K, the activation characteristics decrease appreciably, the electrochemical capacity decreases drastically, the high-rate dischargeability decrease slightly, and the electrochemical stability is improved markedly. The change of electrochemical properties of the alloy heat-treated at different temperatures is related to the microstructure of the alloy.
AB - The effects of heat treatment with different temperature on the microstructure and electrochemical properties of AB5 type MlNi 3.60Co 0.85Mn 0.40Al 0.15 hydride electrode alloy were studied systematically. The results show that, the microstructure of as-cast alloy is typical dendrite and that of the alloy by heat treatment with 1 273 K is unconspicuous dendrite, and after being heat treatment with 1 373 K, the microstructure of the alloy changes to columnar crystal. As compared with as-cast alloy, after being heat-treated by 1 273 K, the activation characteristics decrease and the electrochemical stability improves, while both electrochemical capacity and high-rate dischargeability almost unchange; after being heat-treated by 1 373 K, the activation characteristics decrease appreciably, the electrochemical capacity decreases drastically, the high-rate dischargeability decrease slightly, and the electrochemical stability is improved markedly. The change of electrochemical properties of the alloy heat-treated at different temperatures is related to the microstructure of the alloy.
KW - Electrochemical properties
KW - Heat treatment
KW - Hydride electrode alloy
KW - Microstructure
UR - http://www.scopus.com/inward/record.url?scp=0035421938&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:0035421938
SN - 1004-0609
VL - 11
SP - 587
EP - 592
JO - Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
JF - Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
IS - 4
ER -