Effect of 4 wt.% Cr on microstructure, corrosion resistance and tribological properties of Fe{sub 3}Al–20 wt.%Al{sub 2}O{sub 3} composites

Journal Article · Mon Apr 15 04:00:00 EDT 2013 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2013.01.014· OSTI ID:22285033

Bai, Yaping; Xing, Jiandong; Ma, Shengqiang; Huang, Qian; He, Yuanyuan; Liu, Zhen; Gao, Yimin

Fe{sub 3}Al–20 wt.%Al{sub 2}O{sub 3} ultrafine grained composites with 4 wt.% Cr were prepared by mechanical alloying inducing self propagating high temperature synthesis with subsequent plasma activated sintering. Microstructures of the composites were studied by X-ray diffraction, scanning electron microscopy, energy dispersive spectrum and transmission electron microscope. Then the relative density, room temperature hardness, static corrosion resistance and dry sliding wear behavior at a temperature range of 25 °C–800 °C of the sintered samples were tested and analyzed. The results showed that the composites had high hardness and a good microstructure with fine grain size, high relative density. The composites with 4 wt.% Cr amount also exhibited excellent comprehensive tribological properties at medium–high temperatures especially at a temperature above 500 °C, although the wear resistance did not be improved at 25 °C–500 °C. 4 wt.% Cr element addition improved the corrosion resistance of the composites significantly with the corrosion loss decreasing by 19.48%. - Highlights: ► In-situ Fe{sub 3}Al–20 wt.%Al{sub 2}O{sub 3} composites with 4 wt.% Cr was prepared by MA-PAS. ► Composites had good tribological properties at the temperature above 500 °C. ► Corrosion resistance was improved obviously by 4 wt.% Cr amount.

• OSTI ID: 22285033
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 78; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
AMINO ACIDS
CORROSION RESISTANCE
GRAIN SIZE
SINTERING
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
WEAR RESISTANCE
X-RAY DIFFRACTION