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| Abstract No.: |
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Scheduled at:
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Wednesday, September 28, 2011, Saal B2.2 9:25 AM
Fuel Cells 2
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| Title: |
Effect of dispersed TiC content on the microstructure and properties of shrouded plasma sprayed FeAl/TiC composite coatings
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| Authors: |
Chang-Jiu Li / Xi'an Jiaotong University, P.R. China
Li-Hui Tian* / State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, China
Cheng-Xin Li/ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, China
Guan-Jun Yang/ State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, China
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| Abstract: |
FeAl intermetallics matrix composites reinforced by ceramics particles such as titanium carbide have attracted much attention in recent years. In this study, shrouded plasma spraying was employed to deposit TiC particles dispersed FeAl composite coatings. Nitrogen was used to provide a protective gas shield surrounding the plasma jet to prevent oxidation of the powders. Fe-35Al, Fe-35Al/35vol.%TiC and Fe-35Al/45vol.%TiC powders prepared by mechanical alloying were used as feedstock powders. The phase structure and microstructure of the powders and the as-sprayed coatings were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The coefficient of thermal expansion (CTE) and electrical conductivity of FeAl and FeAl/TiC coatings were also measured at a temperature range from about 25oC up to 1200oC. The results showed dense FeAl/TiC coatings with low oxide inclusions were deposited through shrouding plasma spraying. It was found that the CTE and electrical conductivity of the plasma-sprayed FeAl coatings were significantly influenced by the addition of titanium carbide.
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