物理化学学报 >> 1993, Vol. 9 >> Issue (03): 325-330.doi: 10.3866/PKU.WHXB19930309

研究论文 上一篇    下一篇

稀土(Y、Ce、Sm)对Ni-P非晶态合金热稳定性的影响

张迪倡; 宗保宁; 金泽明; 田敏; 闵恩泽   

  1. 中国石油化工总公司石油化工科学研究院,北京 100083
  • 收稿日期:1991-12-06 修回日期:1992-04-13 发布日期:1993-06-15
  • 通讯作者: 张迪倡

Effect of rare Earth(Y、Ce、Sm)) on Thermal Stability of Amorphous Ni-P Alloy

Zhang Di-Chang; Zong Bao-Ning; Jin Ze-Ming; Tian Min; Min En-Ze   

  1. Research Institute of Petroleum Processing, SINOPEC, Beijing 100083
  • Received:1991-12-06 Revised:1992-04-13 Published:1993-06-15
  • Contact: Zhang Di-Chang

摘要: 用差示扫描量热法(DSC)研究了非晶态合金Ni-RE-P(RE=Y, Ce, Sm,下同)的热稳定性; 用X-光衍射(XRD)和扫描电镜(SEM)检测了在不同温度范围处理的样品的结构变化. 结果表明, 向非晶态Ni-P合金中加入少量稀土元素(Y, Ce, Sm), 可显著提高非晶态Ni-RE-P合金的热稳定性.样品的晶化激活能数据表明, Ni-RE-P的各转变阶段的激活能都比Ni-P的大, 说明Ni-RE-P比Ni-P更难晶化, 即Ni-RE-P比Ni-P更稳定.

关键词: 稀土(Y、Ce、Sm), 非晶态合金Ni-P, 热稳定性, 激活能DSC

Abstract: The thermal stability of amorphous Ni-RE-P (RE=Y, Ce, Sm) alloy has been studied by differential scanning calorimetry (DSC) in this paper. X-ray diffraction (XRD) and scanning electron microscope(SEM) were used to examine the structure change of the samples heated at different temperatures. The results showed that a small amount of rare earth elements(Y, Ce, Sm) added into amorphous Ni-P alloy could considerably enhanced the thermal stability of amorphous Ni-RE-P alloy. For example, only one exothermic peak appeared at 629 K for Ni-P, while the temperature of maximum exothermic peak which was regarded as crystallization of amorphous Ni-Y-P, Ni-Ce-P and Ni-Sm-P alloys was at 786 K, 795 K and 742 K respectively. With increasing of the treatment temperature, the amorphous Ni-P and Ni-RE-P alloys were progressively crystallized to be simultaneous with presentation of the fine crystals Ni and Ni_3P and the fine crystals grew up to greater crystalline particles due to aggregation of them in the bulk.
It was showed that the value of activation energy of the crystallization of Ni-RE-P was much greater than that of Ni-P, this indicated that the crystallization of Ni-RE-P was more difficult than that of Ni-P. A small amount of rare earth element (Y, Ce, Sm) played an important role in enhancing the thermal stability of amorphous Ni-RE-P alloy.

Key words: Rare earth(Y、Ce、Sm), Amorphous alloy(Ni-P), Thermal stability, Activation energy, DSC