物理化学学报 >> 1993, Vol. 9 >> Issue (05): 684-686.doi: 10.3866/PKU.WHXB19930521

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Ni-P非晶态合金超细微粒的晶化行为

范以宁; 胡征; 许昭怡; 陈懿   

  1. 南京大学化学系，南京 210008
  • 收稿日期:1993-03-25 修回日期:1993-04-27 发布日期:1993-10-15
  • 通讯作者: 范以宁

Crystallization Behavior of the Ultrafine Amorphous Nickel-Phosphorus Alloy Particles

Fan Yi-Ning; Hu Zheng; Xu Zhao-Yi; Chen Yi   

  1. Department of Chemistry, Nanjing University, Nanjing 210008
  • Received:1993-03-25 Revised:1993-04-27 Published:1993-10-15
  • Contact: Fan Yi-Ning

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关键词: 非晶, Ni-P合金, 超细微粒, 晶化

Abstract: The crystallization behavior of the uhrafine amorphous Ni-P alloy particles prepared by chemical reduction has been studied by TEM, XRD, XPS and surface area measurments. It is found that neither sintering nor redispersion of the ultrafine par-ticles occurred during thermal treatment, but the surface and bulk structure of the amorphous alloy (sample a)were changed. For the case of the sample treated at 573 K, the alloy was partially segregated to Ni microcrystallites dispersed on the amorphous martrix (sample b). The increase in the surface area of the sample indicates the higher surface beterogeneity of the partially crystallized alloy. Increasing the temperature of thermal treatment to 773 K, the amorphous alloy was completely crystallized and segregated to Ni and Ni_3P alloy (sample c), and the surface area of the particles was decreased due to the aggregation of Ni crystallites at higher temperature.

Key words: Amorphous, Ni-P alloy, Ultrafine particles, Crystallization