采用X射线衍射,示差热分析和金相等方法研究了Nd-Pd系相图中含0—50at-％Nd的区域。发现在该区域内存在6个金属间化合物:NdPd_5,NdPd_3,NdPd_2,Nd_2Pd_3,Nd_1Pd_5和NdPd。其中,NdPd_3,Nd_4Pd_5和NdPd是固液共熔化合物。还测出NdPd_5为SmPt_5型结构,NdPd_?为AuCu_3型结构,低于708±4℃的NdPd为CrB型结构。在该区域内共有3个共晶反应和3个包晶反应。
The region containing O-50at. -%Nd in Nd-Pd phase diagram has beenstudied with X-ray diffraction, differential thermal analysis and micrography. Ithas been found that there are six intermetallic compounds, viz: NdPd_5, NdPd_3, NdPd_2,Nd_2Pd_3, Nd_4Pd_5 and NdPd in the region. NdPd_3, Nd_4Pd_5 and NdPd are solid-liquidcongruent compoundls with melting points of 1217±4℃, 970±4℃ and 952±4℃respectively. It has been determined also that NdPd_5 has a SmPt_5-type structure withα=0.5265nm, b=0.9219nm and c=2.570nm, NdPd_3 a AuCu_3-type structure withα=0.4137nm, and NdPd below 708±4℃ a CrB-type structure with α=0.3827nm.b=1.079nm and c=0.4547nm. There exist three eutectic reactions L?(Pd)+NdPd_5,L?NdPd_2+Nd_2Pd_3 and L?Nd_4Pd_5+NdPd, and three peritectic reactions L+NdPd_3?-NdPd_5, L+NdPd+3?NdPd_2 and L+Nd_4Pd_5?Nd_2Pd_3 in the region.
参考文献
| [1] | |
| [2] | |
| [3] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%