Influence of Rare-Earth Substitution for Iron in FeCrMoCB Bulk Metallic Glasses
Abderrezak Bouchareb1,2, Badis Bendjemil1,2,3, Rafael Piccin1, Marcello Baricco1
1Dipartimento di Chimica I.F.M/NIS/CNISM/INSTM, Universitádi Torino, Via Giuria 9, 10125 Torino, Italy 2Laboratoire d'Etude et la Recherche de l'Etat Condensé(LEREC), University of Badji Mokhtar P.O. Box 12, 23000 Annaba, Algeria 3University of Guelma, P.O. Box 12, 24000 Guelma, Algeria
Influence of Rare-Earth Substitution for Iron in FeCrMoCB Bulk Metallic Glasses
Abderrezak Bouchareb1,2, Badis Bendjemil1,2,3, Rafael Piccin1, Marcello Baricco1
1Dipartimento di Chimica I.F.M/NIS/CNISM/INSTM, Universitádi Torino, Via Giuria 9, 10125 Torino, Italy 2Laboratoire d'Etude et la Recherche de l'Etat Condensé(LEREC), University of Badji Mokhtar P.O. Box 12, 23000 Annaba, Algeria 3University of Guelma, P.O. Box 12, 24000 Guelma, Algeria
The effects of rare earth addition on the glass forming ability of Fe50-xCr15Mo14C15B6Mx (x=0, 2 and M=Y, Gd) bulks and ribbons are studied. 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. The copper mold casting technique leads to a fully amorphous structure up to 2 mm only for compositions containing Y or Gd. In the case of ribbons, a fully amorphous phase is observed for all the compositions. The roles of Y and Gd are discussed on the basis of melting behavior analyzed by high-temperature DSC. Such elements act as oxygen scavengers, avoiding heterogeneous nucleation.
The effects of rare earth addition on the glass forming ability of Fe50-xCr15Mo14C15B6Mx (x=0, 2 and M=Y, Gd) bulks and ribbons are studied. 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. The copper mold casting technique leads to a fully amorphous structure up to 2 mm only for compositions containing Y or Gd. In the case of ribbons, a fully amorphous phase is observed for all the compositions. The roles of Y and Gd are discussed on the basis of melting behavior analyzed by high-temperature DSC. Such elements act as oxygen scavengers, avoiding heterogeneous nucleation.
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2010, Vol. 27 
