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

Journal Article


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.

Publication Date


  • 2021

Citation


  • Chen, G., Liss, K. D., Chen, C., He, Y., Qu, X., & Cao, P. (2021). Porous FeAl alloys via powder sintering: Phase transformation, microstructure and aqueous corrosion behavior. Journal of Materials Science and Technology, 86, 64-69. doi:10.1016/j.jmst.2021.01.029

Scopus Eid


  • 2-s2.0-85101970968

Web Of Science Accession Number


Start Page


  • 64

End Page


  • 69

Volume


  • 86

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.

Publication Date


  • 2021

Citation


  • Chen, G., Liss, K. D., Chen, C., He, Y., Qu, X., & Cao, P. (2021). Porous FeAl alloys via powder sintering: Phase transformation, microstructure and aqueous corrosion behavior. Journal of Materials Science and Technology, 86, 64-69. doi:10.1016/j.jmst.2021.01.029

Scopus Eid


  • 2-s2.0-85101970968

Web Of Science Accession Number


Start Page


  • 64

End Page


  • 69

Volume


  • 86