On the elastic mismatch in the order-disorder transformation and solid state amorphization of intermetallic compounds-II. Criteria for the solid-amorphous transformation in intermetallic compounds

D. L. Beke, H. Bakker, P. I. Loeff

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24 Citations (Scopus)

Abstract

Using simple thermodynamic considerations for the Gibbs-free energies of the crystalline and amorphous states a general condition for the solid-state amorphization of intermetallic compounds by irradiation or mechanical impact was derived. It was obtained that the amorphization is possible if the maximum elastic energy, ΔHel m, stored during the (chemical) order-disorder transition is larger than ΔHtop a, the enthalpy of the topological change of amorphization. This condition can be rewritten into the form: the amorphization is not possible if the order-disorder temperature is less than the melting temperature. Tc <Tm, and if Tc > Tm-in contrast to Johnson's condition-the possibility of the amorphization depends on the relative magnitude of the elastic mismatch energy and the chemical energy of ordering. If their ratio is large enough the amorphization is possible. Detailed calculations, carried out for a large number of compounds, led to a satisfactory agreement with the experimental observations.

Original languageEnglish
Pages (from-to)1267-1273
Number of pages7
JournalActa Metallurgica et Materialia
Volume39
Issue number6
DOIs
Publication statusPublished - 1991

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Order disorder transitions
Amorphization
Intermetallics
Lead compounds
Gibbs free energy
Melting point
Enthalpy
Irradiation
Thermodynamics
Crystalline materials

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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title = "On the elastic mismatch in the order-disorder transformation and solid state amorphization of intermetallic compounds-II. Criteria for the solid-amorphous transformation in intermetallic compounds",
abstract = "Using simple thermodynamic considerations for the Gibbs-free energies of the crystalline and amorphous states a general condition for the solid-state amorphization of intermetallic compounds by irradiation or mechanical impact was derived. It was obtained that the amorphization is possible if the maximum elastic energy, ΔHel m, stored during the (chemical) order-disorder transition is larger than ΔHtop a, the enthalpy of the topological change of amorphization. This condition can be rewritten into the form: the amorphization is not possible if the order-disorder temperature is less than the melting temperature. Tc <Tm, and if Tc > Tm-in contrast to Johnson's condition-the possibility of the amorphization depends on the relative magnitude of the elastic mismatch energy and the chemical energy of ordering. If their ratio is large enough the amorphization is possible. Detailed calculations, carried out for a large number of compounds, led to a satisfactory agreement with the experimental observations.",
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T1 - On the elastic mismatch in the order-disorder transformation and solid state amorphization of intermetallic compounds-II. Criteria for the solid-amorphous transformation in intermetallic compounds

AU - Beke, D. L.

AU - Bakker, H.

AU - Loeff, P. I.

PY - 1991

Y1 - 1991

N2 - Using simple thermodynamic considerations for the Gibbs-free energies of the crystalline and amorphous states a general condition for the solid-state amorphization of intermetallic compounds by irradiation or mechanical impact was derived. It was obtained that the amorphization is possible if the maximum elastic energy, ΔHel m, stored during the (chemical) order-disorder transition is larger than ΔHtop a, the enthalpy of the topological change of amorphization. This condition can be rewritten into the form: the amorphization is not possible if the order-disorder temperature is less than the melting temperature. Tc <Tm, and if Tc > Tm-in contrast to Johnson's condition-the possibility of the amorphization depends on the relative magnitude of the elastic mismatch energy and the chemical energy of ordering. If their ratio is large enough the amorphization is possible. Detailed calculations, carried out for a large number of compounds, led to a satisfactory agreement with the experimental observations.

AB - Using simple thermodynamic considerations for the Gibbs-free energies of the crystalline and amorphous states a general condition for the solid-state amorphization of intermetallic compounds by irradiation or mechanical impact was derived. It was obtained that the amorphization is possible if the maximum elastic energy, ΔHel m, stored during the (chemical) order-disorder transition is larger than ΔHtop a, the enthalpy of the topological change of amorphization. This condition can be rewritten into the form: the amorphization is not possible if the order-disorder temperature is less than the melting temperature. Tc <Tm, and if Tc > Tm-in contrast to Johnson's condition-the possibility of the amorphization depends on the relative magnitude of the elastic mismatch energy and the chemical energy of ordering. If their ratio is large enough the amorphization is possible. Detailed calculations, carried out for a large number of compounds, led to a satisfactory agreement with the experimental observations.

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