Porous FeAl alloys via powder sintering: Phase transformation, microstructure and aqueous corrosion behavior

Gang Chen*, Klaus Dieter Liss, Chao Chen, Yuehui He, Xuanhui Qu, Peng Cao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This study investigates the phase transformation and microstructure of porous FeAl parts sintered from elemental powder mixtures using in-situ neutron diffraction and in-situ thermal dilatometry. A single B2 structured FeAl phase was determined in the sintered FeAl alloy. The combined effects of the Kirkendall porosity, transient liquid phase, and phase transformations associated with powder sintering all contribute to the swelling phenomenon of the final sintered part. The aqueous corrosion test indicates that the corrosion products include iron oxides in the porous FeAl parts. The accumulation of corrosion products blocks the pore channel and decreases pore size and permeability over the soaking time.

Original languageEnglish
Pages (from-to)64-69
Number of pages6
JournalJournal of Materials Science and Technology
Volume86
DOIs
StatePublished - 30 Sep 2021

Keywords

  • Corrosion
  • Intermetallic
  • Neutron diffraction
  • Porous
  • Powder sintering

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