Face-centered-cubic to Hexagonal-close-packed Transformation in Nanocrystalline Ni(Si) by Mechanical Alloying
- 1 July 2000
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 15 (7) , 1429-1432
- https://doi.org/10.1557/jmr.2000.0206
Abstract
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 fcc 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.Keywords
This publication has 19 references indexed in Scilit:
- Disciplines bound by pressureNature, 1998
- Template-directed colloidal crystallizationNature, 1997
- The lattice expansion in nanometre-sized Ni polycrystalsJournal of Physics: Condensed Matter, 1994
- The crystal to glass transformation in relation to meltingJournal of Non-Crystalline Solids, 1993
- Elastic instability of crystals caused by static atom displacement: A mechanism for solid-state amorphizationPhysical Review B, 1993
- Intrinsic instability and entropy stabilization of grain boundariesPhysical Review Letters, 1990
- Ion beam modification of metals: Compositional and microstructural changesProgress in Surface Science, 1989
- A hierarchy of catastrophes as a succession of stability limits for the crystalline stateNature, 1989
- Preparation of ‘‘amorphous’’ Ni60Nb40 by mechanical alloyingApplied Physics Letters, 1983
- The thermodynamics of elastic deformation—IJournal of Physics and Chemistry of Solids, 1980