Phase-transition kinetics of formation of β-Fe5Ge3 in isothermal sintering

D. Eliezer, S. F. Dirnfeld, S. Nadiv

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The phase-transition kinetics during isothermal sintering of the β-Fe5Ge3 phase from a mixture of the pure elements, Fe and Ge was investigated. The phases: α-FeGe, ε-Fe3Ge and η- FexGe were found to appear in the course of phase-transformations towards β-Fe5Ge3. These intermediate phases were identified by means of X-ray diffraction and Mössbauer spectroscopy. Using a differential dilatometer, the densification kinetics were established at 535, 600, 700 and 800°C and verified by density measurements. Diffusion in this sintering process is unidirectional in the sense that Ge atoms diffuse into the Fe lattice but very little vice versa. The apparent activation energy of the densification process is 58 kcal/mol.

Original languageEnglish
Pages (from-to)679-683
Number of pages5
JournalMetallurgical Transactions A (Physical Metallurgy and Materials Science)
Volume11
Issue number5
DOIs
StatePublished - 1 May 1980

ASJC Scopus subject areas

  • Engineering (all)

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