The thermal stability of a nanocrystalline Fe–1.5 wt.% Mo powder milled with nano-SiO2 was investigated in situ by synchrotron radiation X-ray diffraction. Crystallite size is stabilized by the grain-boundary strain, therefore grain growth starts only after a certain amount of this strain has been released. The phenomenon was rationalized by a micromechanics approach, which considers the equilibrium between forces acting on the grain boundary surface.

Role of lattice strain on thermal stability of a nanocrystalline FeMo alloy / Molinari, Alberto; Libardi, Stefano; Leoni, Matteo; Scardi, Paolo. - In: ACTA MATERIALIA. - ISSN 1359-6454. - STAMPA. - 58:3(2010), pp. 963-966. [10.1016/j.actamat.2009.10.012]

Role of lattice strain on thermal stability of a nanocrystalline FeMo alloy

Molinari, Alberto;Libardi, Stefano;Leoni, Matteo;Scardi, Paolo
2010

Abstract

The thermal stability of a nanocrystalline Fe–1.5 wt.% Mo powder milled with nano-SiO2 was investigated in situ by synchrotron radiation X-ray diffraction. Crystallite size is stabilized by the grain-boundary strain, therefore grain growth starts only after a certain amount of this strain has been released. The phenomenon was rationalized by a micromechanics approach, which considers the equilibrium between forces acting on the grain boundary surface.
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Molinari, Alberto; Libardi, Stefano; Leoni, Matteo; Scardi, Paolo
Role of lattice strain on thermal stability of a nanocrystalline FeMo alloy / Molinari, Alberto; Libardi, Stefano; Leoni, Matteo; Scardi, Paolo. - In: ACTA MATERIALIA. - ISSN 1359-6454. - STAMPA. - 58:3(2010), pp. 963-966. [10.1016/j.actamat.2009.10.012]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11572/77066
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