MICROSTRUCTURAL AND THERMAL PROPERTIES OF NANOCRYSTALLINE FE POWDERS
Type : Article de conférence
Auteur(s) : ,
Année : 2010
Domaine : Sciences des matériaux
Conférence: The 2nd International Conference on welding, nondestructive testing and the industry of materials and alloys (ICWNDT-MI’10)
Lieu de la conférence: Oran, Algeria
Résumé en PDF :
Fulltext en PDF :
Mots clés : Nanomaterials ; Iron; Microstructure; Thermal properties
Auteur(s) : ,
Année : 2010
Domaine : Sciences des matériaux
Conférence: The 2nd International Conference on welding, nondestructive testing and the industry of materials and alloys (ICWNDT-MI’10)
Lieu de la conférence: Oran, Algeria
Résumé en PDF :
Fulltext en PDF :
Mots clés : Nanomaterials ; Iron; Microstructure; Thermal properties
Résumé :
The microstructural evolution and thermal properties of nanocrystalline Fe during mechanical milling were investigated by using quantitative X-ray diffraction and thermal analysis techniques. Upon milling of the Fe powders with coarse grains, grain refinement takes place gradually and a steady-state grain size in the nanometer regime (about 13,8 nm) is reached after a certain period of milling. the paramagnetic nanostructured bcc α-Fe domain is extended by about 50°C at the expense of both the magnetic bcc α-Fe and nonmagnetic fcc γ -Fe as compared to coarse grained bcc α-Fe