2007
DOI: 10.1557/jmr.2007.0156
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Phase stability and consolidation of glassy/nanostructured Al85Ni9Nd4Co2alloys

Abstract: Al 85 Ni 9 Nd 4 Co 2 metallic glass/nanostructured ribbons and powders were used as starting materials for producing bulk amorphous/nanostructured Al-based alloys. Glassy ribbons were obtained by melt spinning at wheel surface velocities ranging from 5 to 37 m/s. The amorphous ribbons exhibited a supercooled liquid region of ∼20 K, a reduced glass transition temperature of ∼0.47 and ␥ ∼ 0.328. Mechanical alloying of the elemental powder mixture did not lead to amorphization. However, amorphous powders obtained… Show more

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Cited by 21 publications
(11 citation statements)
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“…The master alloy ingot of Fe 78 Si 9 B 13 was firstly prepared by arc melting under a Ti-gettered argon atmosphere five times to achieve homogenous chemical composition. From the master alloy, the glassy ribbons were fabricated by ejecting melting master alloy on a single copper roller [49][50][51]. The wheel speed of the copper roller used was about 30 m/s.…”
Section: Materials and Chemicalsmentioning
confidence: 99%
“…The master alloy ingot of Fe 78 Si 9 B 13 was firstly prepared by arc melting under a Ti-gettered argon atmosphere five times to achieve homogenous chemical composition. From the master alloy, the glassy ribbons were fabricated by ejecting melting master alloy on a single copper roller [49][50][51]. The wheel speed of the copper roller used was about 30 m/s.…”
Section: Materials and Chemicalsmentioning
confidence: 99%
“…Besides crystalline materials, metallic glasses have a great potential for applications as new high-strength structural materials due to their excellent mechanical properties, such as higher elastic limit and strength then their crystalline counterparts [2,3]. Among the Al-based glass forming systems, Al-TM-RE (TE = transition metal, RE = rare earth metal) alloys [4][5][6] are of particular interest due to high specific strength and better corrosion resistance in acidic, alkali and alkaline media than crystalline alloys of similar composition.…”
Section: Introductionmentioning
confidence: 99%
“…The driving force for the crystallization is the Gibbs free energy difference between the amorphous and the crystalline states. Crystallization could happen when an amorphous solid is subject to heat treatment Suryanarayana & Inoue, 2011;Zhang et al, 2003;Zhang & Xu, 2004;Zhang et al, 2005a;2005b;Zhang et al, 2006a;Zhang et al, 2007a;Zhang et al, 2007b), mechanical deformation (Fornell et al, 2010;Lohwongwatana et al, 2006;Setyawan et al, 2010), pressure Jiang et al, 2002;Jiang et al, 2003b;Yang et al, 2006;Ye & Lu, 1999), and/or irradiations (Azam et al, 1979). Amongst these processing techniques, conventionally thermal annealing is the most commonly used in the investigation on crystallization of amorphous alloys.…”
Section: Crystallization Mechanismsmentioning
confidence: 99%
“…This opens up the possibility of preparing truly bulk samples through powder consolidation in supercooled liquid region. In the Zr-, Cu-, Fe-and Ni-based alloy systems, some successful consolidation of amorphous powders with wide supercooled liquid region has been achieved by warm extrusion, spark plasma sintering and equal channel angular pressing (ECAP) (Choi et al, 2007;Ishihará et al, 2002;Itoi et al, 2001;Karaman et al, 2004;Kawamura et al, 1997;Kim et al, 2004;Kim et al, 2009;Lee et al, 2003;Mear et al, 2009;Robertson et al, 2003;Senkov et al, 2004;Senkov et al, 2005;Sordelet et al, 2002;Zhang et al, 2006b;Zhang, et al, 2007a). The consolidated samples show almost the same thermal properties, mechanical properties, and/or soft magnetic properties as those of the BMGs prepared by direct melt casting from molted The data of the onset temperature of crystallization (T x ) and the glass transition temperature (T g ) at the heating rate of 0.67 K s -1 are also shown.…”
Section: Bulk Amorphous Alloy Consolidated From Amorphous Powder Precmentioning
confidence: 99%