Face-centered-cubic to hexagonal-close-packed transformation in nanocrystalline Ni(Si) by mechanical alloying

被引：16
|
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：
JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 07期
关键词：
D O I：
10.1557/JMR.2000.0206
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An allotropic transition from face-centered-cubic (fcc) to hexagonal-close-packed (hcp) Ni(Si) solid solution in Ni95Si5 and Ni90Si10 during nanocrystallization by mechanical alloying is reported. The transformation was identified as a defect-induced melting accompanied by a volume expansion of 8.6% and was observed when fee Ni(Si) reached a critical crystallite size of 10 nm. Calculation based on equation of state showed that a 37% reduction in tetragonal shear modulus and a negative pressure of about 8.7 GPa were generated at the onset of transformation.
引用
收藏
页码：1429 / 1432
页数：4
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