Communication

Metallurgical and Materials Transactions A

, Volume 43, Issue 3, pp 791-795

Interdiffusion in the Fe-Pt System

  • Sangeeta SantraAffiliated withDepartment of Materials Engineering, Indian Institute of Science
  • , Avik MondalAffiliated withDepartment of Materials Engineering, Indian Institute of Science
  • , Aloke PaulAffiliated withDepartment of Materials Engineering, Indian Institute of Science Email author 

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Abstract

Diffusion-couple experiments are conducted in the Fe-Pt system. The phase boundary compositions of the phases measured in this study are found to be different than the compositions published previously. In the γ-FePt solid solution, the interdiffusion coefficient increases with the Pt content up to 25 at. pct Pt. Fe is the faster diffusing species in this phase. The trend in the interdiffusion coefficient is explained with the help of calculated driving force for diffusion. To reduce errors, the average interdiffusion coefficients are calculated in the FePt and FePt3 compounds.