CRYSTALLIZATION BEHAVIOR OF THE ULTRAFINE AMORPHOUS NICKEL-PHOSPHORUS ALLOY PARTICLES

被引：0

作者：

Fan Yining ^{[1
]}

Hu Zheng ^{[1
]}

Xu Zhaoyi ^{[1
]}

Chen Yi ^{[1
]}

机构：

[1] Nanjing Univ, Dept Chem, Nanjing 210008, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 1993年 / 9卷 / 05期

关键词：

Amorphous; Ni-P alloy; Ultrafine particles; Crystallization;

D O I：

10.3866/PKU.WHXB19930521

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The crystallization behaviour of the ultrafine amorphous Ni-P alloy particles prepared by chemical reduction has been studies by TEM, XRD, XPS and surface area measurements. It is found that neither sintering nor redispersion of the ultrafine particles 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 573K, the alloy was partially segregated to Ni microcrystallites dispersed on the amorphous matrix (sample b). The increase in the surface area of the sample indicates the higher surface heterogeneity of the partially crystallized alloy. Increasing the temperature of thermal treatment to 773K, the amorphous alloy was completely crystallized and segragated to Ni and Ni2P alloy (sample c), and the surface area of the particles was decreased due to the aggregation of Ni crystallites at higher temperature.

引用

页码：684 / 686

页数：3