Preparation and Characterization of Fe-Based Metallic Glasses with Pure and Raw Elements
Nassima Seghairi1,2, Badis Bendjemil1,3,4**, Gabriel Lavorato1, Alberto Castellero1, Marcello Baricco1
1Dipartimento di Chimica I.F.M/NIS/CNISM/INSTM, Università di Torino, Via Giuria 9, 10125 Trino, Italy 2University of Larbi Ben M'hidi, Oum El Bouaghi, Algeria 3LASEA, Faculty of Sciences, Department of Chimistry, University of Annaba, Algeria 4University of Guelma, P. O. Box 12, 24000 Guelma, Algeria
Abstract：Amorphous alloys with a composition (at.%) Fe48Cr15Mo14C15B6Y2 were prepared by using either pure elements (alloy B1) or a commercial AISI430 steel as a base material (B2). When prepared from pure elements, alloy (B1) could be cast in plate form with a fixed thickness of 2 mm and variable lengths between 10 and 20 mm by means of copper-mold injection in an air atmosphere. In the case of alloy B2, prepared by using commercial grade raw materials, rods of 2 mm diameter are obtained. Ribbons (B1 and B2) of width 5 mm and thickness about 30 μm are prepared from the arc-melted ingots using a single roller melt spinner at a wheel speed of 40 m/s. The thermal and structural properties of the samples are measured by a combination of differential scanning calorimetry (DSC), x-ray diffraction and scanning electron microscopy. Chemical compositions are checked by energy dispersive spectroscopy analysis. X-ray diffraction and scanning electron microscopy observations confirm that an amorphous structure is obtained in all the samples. A minor fraction of crystalline phases (oxides and carbides) is detected on the as-cast surface. Values of hardness and Young modulus were measured by nanoindentation for both the alloys. The effects of adverse casting conditions (such as air atmosphere, non-conventional injection copper mold casting and the partial replacement of pure elements with commercial grade raw materials) on the glass formation and properties of the alloy are discussed.
. [J]. Chin. Phys. Lett., 2012, 29(11): 118102-118102.
Nassima Seghairi, Badis Bendjemil, Gabriel Lavorato, Alberto Castellero, Marcello Baricco. Preparation and Characterization of Fe-Based Metallic Glasses with Pure and Raw Elements. Chin. Phys. Lett., 2012, 29(11): 118102-118102.
2012, Vol. 29 
