Preparation and Characterization of Fe-Based Metallic Glasses with Pure and Raw Elements  

作　　者：Nassima Seghairi Badis Bendjemil Gabriel Lavorato Alberto Castellero Marcello Baricco 

机构地区：[1]Dipartimento di Chimica I.F.M/NIS/CNISM/INSTM,Universitàdi Torino,Via Giuria 9,10125 Trino,Italy [2]University of Larbi Ben M'hidi,Oum El Bouaghi,Algeria [3]LASEA,Faculty of Sciences,Department of Chimistry,University of Annaba,Algeria [4]University of Guelma,P.O.Box 12,24000 Guelma,Algeria

出　　处：《Chinese Physics Letters》2012年第11期207-210,共4页中国物理快报（英文版）

基　　金：Supported by Regione Piemonte under Grant No D23;the WWS Project of the Univerity of Torino.

摘　　要：Amorphous alloys with a composition(at.%)Fe_(48)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2) 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 30μm 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.

关 键 词：alloy CASTING ROLLER 

分 类 号：TG1[金属学及工艺—金属学]