Fabrication of protective-coated SiC reinforced tungsten matrix composites with reduced reaction phases by spark plasma sintering |
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Authors: | Malik Adeel Umer Dongju Lee Owais Ahmed Waseem Ho Jin Ryu Soon Hyung Hong |
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Affiliation: | 1.Department of Materials Science and Engineering,Korea Advanced Institute of Science and Technology,Daejeon,Republic of Korea;2.Department of Nuclear and Quantum Engineering,Korea Advanced Institute of Science and Technology,Daejeon,Republic of Korea |
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Abstract: | SiC reinforced tungsten matrix composites were fabricated via the spark plasma sintering process. In order to prevent an interfacial reaction between the SiC and tungsten during sintering, TiOx coated SiC particles were synthesized by a solution-based process. TiOx layer coated SiC particles were treated in high temperature nitriding conditions or annealed in a high temperature vacuum to form TiN or TiC coated SiC particles, respectively. The TiC layers coated on SiC particles successfully prevented tungsten from reacting with SiC; hence the proposed process resulted in successful fabrication of the SiC/W composites. The mechanical properties such as compressive strength and flexural strength of the composites were measured. Additionally, the effect of SiC on the high temperature oxidative ablation of tungsten was also investigated. The addition of SiC resulted in an improved oxidative ablation resistance of the tungsten-based composites. |
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