您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 5    October 2001

[PDF Download]    [Flash Online]

    

Effects of Ni addition on
liquid phase separation and giant
magnetoresistance of Cu-Co alloys
SUN Zhan-bo(孙占波), SONG Xiao-ping(宋晓平),
HU Zhu-dong(胡柱东), ZHU Yao-min(祝要民),
LIU Jian(刘  剑), YANG Sen(杨  森), LI Xiao-yuan(李晓园)

School of Science, Xi′an Jiaotong University, Xi′an 710049,P.R.China

Abstract: The effects of Ni addition on the liquid phase separation and giant magnetoresistance (GMR) of Cu-Co alloys were discussed. The results reveal that Ni addition can partially restrain the liquid phase separation of Cu-Co alloys, resulting in a decrease of volume fraction for the Co-rich particles separated from the liquid phase and in refined microstructures. The composition analyses indicate that Ni is dissolved in both the Co-rich and the Cu-rich phases, but Ni content in the Co-rich phase is much higher than that in the Cu matrix. At the same time, Ni addition enhance the solubility between Cu and Co, especially Cu in Co solid solution. Ni alloying into Cu-Co alloys can fully prevent the liquid phase separation during melt spinning, which is very beneficial to improve GMR of Cu-Co alloys.

 

Key words:  Cu-Co-Ni alloys; supercooling; melt-spun; liquid phase separation; microstructure; GMR

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn