### Abstract

With the use of the similarity of interatomic potentials relations concerning vacancy and diffusion characteristics in disordered regular solid solutions have been derived. It has been shown that the vacancy concentration is constant along ifT_{c}(x) = T_{A} + (T_{B} - T_{A})x + 2ΔT_{x}(1-x), (T_{A} and T_{B} are the melting points of pure components A and B respectively, and ΔT is proportional to the excess enthalpy of mixing, x is the concentration of the atoms B) which is proportional to the binding energy of the crystal. The validity conditions of several empirical rules known in the literature are also analyzed. It has been found that the generalization of the well-known rule for self- and impurity diffusion in pure metals has the following form In D_{0}^{z}(x) ∼ p Q^{z}(x) T_{c}(x) (Z = A or B) where p is a constant for alloys having identical structures (D_{0}^{z}(x) and Q^{z}(x) denote the preexponential factors and the activation energies respectively). The results calculated from the relations derived were compared with experimental data for tracer diffusion in the systems AgAu, CuNi (having slight deviation from regularity), Pb-Tl (showing ordering phenomena) and AlZn (clustering effects) and a good agreement was found.

Original language | English |
---|---|

Pages (from-to) | 543-555 |

Number of pages | 13 |

Journal | Journal of Physics and Chemistry of Solids |

Volume | 40 |

Issue number | 7 |

DOIs | |

Publication status | Published - 1979 |

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### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

### Cite this

*Journal of Physics and Chemistry of Solids*,

*40*(7), 543-555. https://doi.org/10.1016/0022-3697(79)90083-0

**Connections between thermodynamic quantities and vacancy and diffusion characteristics in binary metallic solid solutions.** / Beke, D.; Gödény, I.; Kedves, F. J.; Erdélyi, G.

Research output: Contribution to journal › Article

*Journal of Physics and Chemistry of Solids*, vol. 40, no. 7, pp. 543-555. https://doi.org/10.1016/0022-3697(79)90083-0

}

TY - JOUR

T1 - Connections between thermodynamic quantities and vacancy and diffusion characteristics in binary metallic solid solutions

AU - Beke, D.

AU - Gödény, I.

AU - Kedves, F. J.

AU - Erdélyi, G.

PY - 1979

Y1 - 1979

N2 - With the use of the similarity of interatomic potentials relations concerning vacancy and diffusion characteristics in disordered regular solid solutions have been derived. It has been shown that the vacancy concentration is constant along ifTc(x) = TA + (TB - TA)x + 2ΔTx(1-x), (TA and TB are the melting points of pure components A and B respectively, and ΔT is proportional to the excess enthalpy of mixing, x is the concentration of the atoms B) which is proportional to the binding energy of the crystal. The validity conditions of several empirical rules known in the literature are also analyzed. It has been found that the generalization of the well-known rule for self- and impurity diffusion in pure metals has the following form In D0z(x) ∼ p Qz(x) Tc(x) (Z = A or B) where p is a constant for alloys having identical structures (D0z(x) and Qz(x) denote the preexponential factors and the activation energies respectively). The results calculated from the relations derived were compared with experimental data for tracer diffusion in the systems AgAu, CuNi (having slight deviation from regularity), Pb-Tl (showing ordering phenomena) and AlZn (clustering effects) and a good agreement was found.

AB - With the use of the similarity of interatomic potentials relations concerning vacancy and diffusion characteristics in disordered regular solid solutions have been derived. It has been shown that the vacancy concentration is constant along ifTc(x) = TA + (TB - TA)x + 2ΔTx(1-x), (TA and TB are the melting points of pure components A and B respectively, and ΔT is proportional to the excess enthalpy of mixing, x is the concentration of the atoms B) which is proportional to the binding energy of the crystal. The validity conditions of several empirical rules known in the literature are also analyzed. It has been found that the generalization of the well-known rule for self- and impurity diffusion in pure metals has the following form In D0z(x) ∼ p Qz(x) Tc(x) (Z = A or B) where p is a constant for alloys having identical structures (D0z(x) and Qz(x) denote the preexponential factors and the activation energies respectively). The results calculated from the relations derived were compared with experimental data for tracer diffusion in the systems AgAu, CuNi (having slight deviation from regularity), Pb-Tl (showing ordering phenomena) and AlZn (clustering effects) and a good agreement was found.

UR - http://www.scopus.com/inward/record.url?scp=0018320461&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0018320461&partnerID=8YFLogxK

U2 - 10.1016/0022-3697(79)90083-0

DO - 10.1016/0022-3697(79)90083-0

M3 - Article

AN - SCOPUS:0018320461

VL - 40

SP - 543

EP - 555

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 7

ER -