Amorphization in mechanically alloyed (Ti, Zr, Nb)–(Cu, Ni)–Al equiatomic alloys

Zhang, Lai-Chang; Kim, K.B.; Yu, Peng; Zhang, W.Y.; Kunz, Ulrike; Eckert, J.

doi:10.1016/j.jallcom.2006.03.092

Cited by 75 publications

(36 citation statements)

References 41 publications

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“…In addition, the fcc phase will transform back to the bcc phase under slow cooling in air. This is quite similar to the deformation-induced nanocrystallization in amorphous alloys, 5,23 which was argued not to directly result just from the deformation-induced temperature rise. It is known that the bcc↔ fcc phase transition in Co-Fe alloys is diffusion controlled.…”

supporting

confidence: 62%

Deformation-induced nanoscale high-temperature phase separation in Co–Fe alloys at room temperature

Zhang

Calin

Paturaud

et al. 2007

Applied Physics Letters

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Instead of applying severe plastic deformation, high-temperature heat treatment or high pressure, grain refinement and high-temperature phase separation induced by deformation in single-phase body-centered-cubic (bcc) coarse-grained Co–Fe alloys have been achieved by simple room-temperature compression. The alloys exhibit large plasticity over 140% without fracture. Phase separation from the bcc phase to nanoscale face-centered-cubic Fe and Co phases, which generally occurs at high temperature above ∼1150K, is formed in the deformed samples. The possible mechanisms are shear deformation and deformation-enhanced atomic diffusion rather than the temperature rise during deformation.

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supporting

confidence: 62%

Deformation-induced nanoscale high-temperature phase separation in Co–Fe alloys at room temperature

Zhang

Calin

Paturaud

et al. 2007

Applied Physics Letters

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“…The NGB decomposition was fitted by the pseudo-first-order kinetic model as shown in Equation (2), similar to other reports [26,52]:…”

Section: Methodsmentioning

confidence: 94%

Excellent Performance of Fe78Si9B13 Metallic Glass for Activating Peroxymonosulfate in Degradation of Naphthol Green B

Xue-fen

Liang

et al. 2017

Metals

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Abstract:The functional application of metallic glasses in the catalytic field has widely attracted research attention due to its unique atomic structure compared to crystalline materials. It has been reported that metallic glasses can effectively activate H 2 O 2 and persulfate, yet the activation of peroxymonosulfate by metallic glasses is not studied well. In this work, the metallic glass with atomic composition of Fe 78 Si 9 B 13 was applied for investigating the peroxymonosulfate (PMS) activation on degradation of naphthol green B (NGB) dye. The change of surface morphology indicated the important role of oxide films during the dye degradation. The effects and first-order kinetics model of various reaction parameters were evaluated systematically, including PMS concentration, catalyst dosage, irradiation intensity, and dye concentration. The results showed that about 98% of the dye removal rate could be achieved only within 10 min under rational conditions. The reaction kinetics k of 0.1339 min −1 without ribbons was sharply improved to 0.3140 min −1 by adding 0.5 g/L ribbons, indicating the superior activation ability of Fe 78 Si 9 B 13 metallic glass. The recycling experiment revealed that the Fe 78 Si 9 B 13 ribbons exhibited the excellent surface stability and catalytic reusability for activating PMS even after reused for 10th run.

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“…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%

Crystallization Behavior and Control of Amorphous Alloys

Zhang¹

2012

Advances in Crystallization Processes

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Amorphization in mechanically alloyed (Ti, Zr, Nb)–(Cu, Ni)–Al equiatomic alloys

Cited by 75 publications

References 41 publications

Deformation-induced nanoscale high-temperature phase separation in Co–Fe alloys at room temperature

Deformation-induced nanoscale high-temperature phase separation in Co–Fe alloys at room temperature

Excellent Performance of Fe78Si9B13 Metallic Glass for Activating Peroxymonosulfate in Degradation of Naphthol Green B

Crystallization Behavior and Control of Amorphous Alloys

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