Thermal stability of nanocrystalline fcc and hcp Ni(Si) synthesized by mechanical alloying of Ni90Si10

被引：5

作者：

Datta, MK ^{[1
]}

Pabi, SK ^{[1
]}

Murty, BS ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Kharagpur 721302, W Bengal, India

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2001年 / 81卷 / 02期

关键词：

D O I：

10.1080/095008301300006717

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal stability of nanocrystalline fcc and hcp Ni(Si), obtained by mechanical alloying of Ni90Si10, has been studied. The allotropic transformation from fee to hcp Ni(Si) is accompanied by a volume expansion of 8.6% and is observed when fee Ni(Si) reaches a critical crystallite size of 10 nm. The hcp phase transforms to stable fcc Ni(Si) at 573 K. It has been identified that the lattice distortion in nanometre-sized crystallites from the equilibrium configuration and the decrease in the interfacial energy with grain refinement act as self obstacles in controlling the grain growth of nanocrystalline materials.

引用

页码：77 / 84

页数：8

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