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Microstructure and Oxidation Resistance of Fe 3 Al Coatings on Austenitic Stainless Steel by Spark Plasma Sintering
Author(s) -
Nishimoto Akio,
Akamatsu Katsuya
Publication year - 2009
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200932407
Subject(s) - materials science , coating , intermetallic , spark plasma sintering , metallurgy , microstructure , austenitic stainless steel , austenite , sintering , ultimate tensile strength , oxidizing agent , composite material , corrosion , alloy , chemistry , organic chemistry
Fe 3 Al intermetallic compound layers were coated on austenitic stainless steel SUS304 by the spark plasma sintering (SPS) process to improve its wear and oxidation resistances. The coating was carried out at 1 173 K for 0.6–10.8 ks at a coating pressure of 3–45 MPa. The coatings were densified with increase in the sinter‐coating temperature and pressure. The tensile strength of the coatings was 30–50 MPa. These coatings fractured at the interface between the coatings and the substrate. The mass increase of coated specimen after oxidizing at 1 123 K for 1 000 ks was less than that of the untreated specimen. This result indicates that the Fe‐Al intermetallic compound coating markedly improved the oxidation resistance of the austenitic stainless steel.