作者:Huaiying Zhou、Chengying Tang、Minmin Tong、Zhengfei Gu、Qingrong Yao、Guangfei Rao
DOI:10.1016/j.jallcom.2011.09.054
日期:2012.1
The binary Ce-Cu system has been re-investigated via the selected eighteen key alloys by means of the differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM) with energy dispersive X-ray analysis techniques. Five intermetallic compounds, Cu6Ce, Cu5Ce, Cu4Ce, Cu2Ce, and CuCe, have been confirmed. Cu6Ce and Cu2Ce melt congruently at 947 degrees C and 810 degrees C, respectively. Cu5Ce, Cu4Ce, and CuCe are formed through peritectic reactions, L + Cu6Ce <-> Cu5Ce at 799 degrees C, L + Cu5Ce <-> Cu4Ce at 792 degrees C, and L + Cu2Ce <-> CuCe at 492 degrees C, respectively. Three eutectic reactions, L <-> (Cu) + Cu6Ce at 879 degrees C, L <-> Cu4Ce + Cu2Ce at 753 degrees C, and L <-> CuCe + (gamma Ce) at 407 degrees C, have been observed. One catatectic reaction, (delta Ce) <-> L + (gamma Ce) at 702 degrees C, was determined. According to the present experimental results, the Ce-Cu phase diagram is revised. (C) 2011 Elsevier B.V. All rights reserved.