摘要
The ribbons of Cu-Cr alloys with high Cr content (15%- 35%, mass fraction) were prepared by rapid solidification. The microstructures of solidified samples were analyzed by scanning electron microscopy and transmission electron microscopy. The results reveal that a representative liquid phase separation microstructures are observed in Cu75Cr25 ribbons solidified at a cooling rate of about 104K/s. The liquid phase separation is not restrained when the cooling rate is enhanced to about 107K/s. However, the size of Cr particles solidified from Cr-rich liquid or Cr-rich regions in alloy melts could be refined by increasing the cooling rates. The size of Cr particles increases with increasing Cr contents when the ribbons contain 15% to 35%Cr.
The ribbons of Cu-Cr alloys with high Cr content （15%-35%, mass fraction） were prepared by rapid solidification. The microstructures of solidified samples were analyzed by scanning electron microscopy and transmission electron microscopy. The results reveal that a representative liquid phase separation microstructures arc observed in Cu75Cr25 ribbons solidified at a cooling rate of about 10^4K/s. The liquid phase separation is not restrained when the cooling rate is enhanced to about 10^7K/s. However, the size of Cr particles solidified from Cr-rich liquid or Cr-rich regions in alloy melts could be refined by increasing the cooling rates. The size of Cr particles increases with increasing Cr contents when the ribbons contain 15% to 35%Cr.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2006年第5期998-1002,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(50371066) supported by the National Natural Science Foundation of China
关键词
CU-CR
铜合金
液相分离
快速冷却
凝固
Cu-Cr alloy
liquid phase separation
melt spinning
rapid cooling
