### Abstract

The empirically well established constancy of the activation entropy of self-diffusion S//v plus S//m (S//v and S//m are the entropies of the formation and migration of vacancies, respectively) over classes of metals of the same structure is derived from simple dimensional considerations, using the similarity of interatomic potentials. The same similarity considerations, supplemented by the introduction of a single parameter characterizing the strength of the host/impurity interaction, furnish another well known empirical rule, namely the approximate proportionality between ln (D//o//i/D//o) and (Q//i minus Q)/T//m, where D//o and D//o//i are the preexponential factors, Q and Q//i the activation enthalpies for self- and impurity diffusion, respectively, and T//m is the melting temperature of the host crystal.

Original language | English |
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Pages (from-to) | 444-447 |

Number of pages | 4 |

Journal | Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques |

Volume | 68 |

Issue number | 6 |

Publication status | Published - Jun 1977 |

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### ASJC Scopus subject areas

- Metals and Alloys

### Cite this

*Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques*,

*68*(6), 444-447.

**CONNECTION BETWEEN THE PREEXPONENTIAL FACTOR AND THE ACTIVATION ENTHALPY FOR SELF- AND IMPURITY DIFFUSION.** / Beke, D.; Geszti, Tamas; Erdelyi, Gabor.

Research output: Contribution to journal › Article

*Zeitschrift fuer Metallkunde/Materials Research and Advanced Techniques*, vol. 68, no. 6, pp. 444-447.

}

TY - JOUR

T1 - CONNECTION BETWEEN THE PREEXPONENTIAL FACTOR AND THE ACTIVATION ENTHALPY FOR SELF- AND IMPURITY DIFFUSION.

AU - Beke, D.

AU - Geszti, Tamas

AU - Erdelyi, Gabor

PY - 1977/6

Y1 - 1977/6

N2 - The empirically well established constancy of the activation entropy of self-diffusion S//v plus S//m (S//v and S//m are the entropies of the formation and migration of vacancies, respectively) over classes of metals of the same structure is derived from simple dimensional considerations, using the similarity of interatomic potentials. The same similarity considerations, supplemented by the introduction of a single parameter characterizing the strength of the host/impurity interaction, furnish another well known empirical rule, namely the approximate proportionality between ln (D//o//i/D//o) and (Q//i minus Q)/T//m, where D//o and D//o//i are the preexponential factors, Q and Q//i the activation enthalpies for self- and impurity diffusion, respectively, and T//m is the melting temperature of the host crystal.

AB - The empirically well established constancy of the activation entropy of self-diffusion S//v plus S//m (S//v and S//m are the entropies of the formation and migration of vacancies, respectively) over classes of metals of the same structure is derived from simple dimensional considerations, using the similarity of interatomic potentials. The same similarity considerations, supplemented by the introduction of a single parameter characterizing the strength of the host/impurity interaction, furnish another well known empirical rule, namely the approximate proportionality between ln (D//o//i/D//o) and (Q//i minus Q)/T//m, where D//o and D//o//i are the preexponential factors, Q and Q//i the activation enthalpies for self- and impurity diffusion, respectively, and T//m is the melting temperature of the host crystal.

UR - http://www.scopus.com/inward/record.url?scp=0017503093&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0017503093&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0017503093

VL - 68

SP - 444

EP - 447

JO - International Journal of Materials Research

JF - International Journal of Materials Research

SN - 1862-5282

IS - 6

ER -