Proposed correlation of glass formation ability with critical dosage for the amorphous alloys formed by ion beam mixing

A negative correlation of glass formation ability (GFA) with the critical dosage (Dc) is first proposed for amorphous alloys formed by ion beam mixing (IBM), i.e. the lower the Dc the better the GFA, implying that Dc could serve as a GFA indicator.

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Ion Beam Mixing of Ni-Ti Bilayered Thin Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100118345 ◽

1985 ◽

Vol 43 ◽

pp. 290-291

Author(s):

A. K. Rai ◽

R. S. Bhattacharya ◽

M. H. Rashid

Keyword(s):

Crystal Structure ◽

Thin Films ◽

Amorphous Alloys ◽

Ion Beam ◽

Ion Bombardment ◽

High Energy ◽

Mixing Efficiency ◽

Ion Beam Mixing ◽

Enhanced Diffusion ◽

Binary Metal

Ion beam mixing has recently been found to be an effective method of producing amorphous alloys in the binary metal systems where the two original constituent metals are of different crystal structure. The mechanism of ion beam mixing are not well understood yet. Several mechanisms have been proposed to account for the observed mixing phenomena. The first mechanism is enhanced diffusion due to defects created by the incoming ions. Second is the cascade mixing mechanism for which the kinematicel collisional models exist in the literature. Third mechanism is thermal spikes. In the present work we have studied the mixing efficiency and ion beam induced amorphisation of Ni-Ti system under high energy ion bombardment and the results are compared with collisional models. We have employed plan and x-sectional veiw TEM and RBS techniques in the present work.

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Ion beam mixing to study the metallic glass formation of the Cu–Zr system

Materials Letters ◽

10.1016/j.matlet.2009.10.024 ◽

2010 ◽

Vol 64 (1) ◽

pp. 96-98 ◽

Cited By ~ 2

Author(s):

T.L. Wang ◽

W.T. Huang ◽

W.C. Wang ◽

B.X. Liu

Keyword(s):

Metallic Glass ◽

Glass Formation ◽

Ion Beam ◽

Ion Beam Mixing

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On metallic glass formation in CuNb by ion beam mixing

Materials Science and Engineering A ◽

10.1016/0921-5093(89)90666-7 ◽

1989 ◽

Vol 115 ◽

pp. 123-126 ◽

Cited By ~ 7

Author(s):

L.-U Aaen Andersen ◽

J Bøttiger ◽

K Dyrbye

Keyword(s):

Metallic Glass ◽

Glass Formation ◽

Ion Beam ◽

Ion Beam Mixing

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Amorphous Alloy Formation in Immiscible Cu-Ta and Cu-W Systems by Atomistic Modeling and Ion-Beam Mixing

MRS Proceedings ◽

10.1557/proc-806-mm5.14 ◽

2003 ◽

Vol 806 ◽

Cited By ~ 3

Author(s):

H. R. Gong ◽

L. T. Kong ◽

B. X. Liu

Keyword(s):

Amorphous Alloys ◽

Composition Range ◽

Ion Beam ◽

Alloy Formation ◽

Atomistic Modeling ◽

Ion Beam Mixing ◽

Embedded Atom ◽

Multilayered Sample ◽

Critical Composition ◽

Dynamics Simulations

ABSTRACTFor the immiscible Cu-Ta and Cu-W systems, realistic n-body potentials are derived under an embedded-atom method through fitting the cross potentials to some physical properties obtained from ab initio calculations for a few possible metastable Cu-Ta and Cu-W crystalline phases, respectively. Based on the derived potentials, molecular dynamics simulations reveal that in the Cu-Ta system, 30 at. % of Ta in Cu is the critical composition for the crystal-to-amorphous transition in the Cu-rich Cu-Ta solid solutions, and that in the Cu-W system, amorphous alloys can be formed within the composition range of 20–65 at. % of W. Interestingly, amorphous alloys are indeed obtained by ion-beam mixing in properly designed Cu70Ta 30, Cu65Ta35, Cu60Ta 40, and Cu50Ta 50 multilayered films, while crystalline Cu and Ta remain in Cu75Ta25 multilayered sample, which matches well with the critical composition of 30 at. % of Ta predicted by simulation. Moreover, there have been experimental data, which are in support of the predicted composition range of the Cu-W system by simulations.

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