Paper number 214
|COMPATIBILITY OF SI-C-O FIBER AND SI-C FIBER WITH ALUMINUM|
J. Pan1, M. Yoshida1, G. Sasaki1, H. Fukunaga1, and D. M. Yang2
1Department of Mechanical Engineering, Hiroshima University,
Kagamiyama 1-4-1, Higashi-Hiroshima, 739-8527, Japan
2Department of Materials Engineering and Applied Chemistry, Changsha Institute of Technology, Changsha, 410073, China
|Summary||Two kinds of SiC-based fibers have been evaluated for their compatibility with aluminum. Si-C-O (Nicalon) fiber and oxygen-free cured Si-C (Hi-Nicalon) fiber were coated with pure aluminum and heat treated at 700°C for different times. Tensile test of Al-coated fibers showed that Si-C fiber had lower strength degradation than Si-C-O fiber. DSC thermogram displayed an exothermic peak as a proof of interface reaction between Si-C-O fiber and aluminum. SEM and TEM observation of SiC/Al composites exhibited that Si-C-O fiber reacted with aluminum more readily than Si-C fiber. Two kinds of SiC-based fiber reinforced aluminum composite wires were prepared by ultrasonic liquid infiltration method. After exposed at the temperature lower than 500°C for 30 min the wire strength reduction was less than 10%. If heated at 600°C and 700°C, Si-C-O/Al wire lost its half strength and was near to zero, respectively. But for Si-C/Al wire, strength degradation was 20% (600°C-30 min heating) and 88% (700°C-30 min heating). Low-oxygen Si-C fiber has been improved in compatibility with aluminum.
||Keywords|| SiC fiber, aluminum matrix composites, physical vapor deposition, squeeze casting, ultrasonic liquid infiltration, tensile strength, scanning electron microscopy, transmission electron microscopy.
Theme : Metal Matrix Composites
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