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首页> 外文期刊>Metals and Materials International >Fabrication of Protective-coated SiC Reinforced Tungsten Matrix Composites with Reduced Reaction Phases by Spark Plasma Sintering
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Fabrication of Protective-coated SiC Reinforced Tungsten Matrix Composites with Reduced Reaction Phases by Spark Plasma Sintering

机译:放电等离子烧结制备反应相减少的保护涂层SiC增强钨基复合材料

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摘要

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.
机译:SiC增强钨基复合材料是通过火花等离子体烧结工艺制备的。为了防止烧结期间SiC和钨之间的界面反应,通过基于溶液的方法合成了TiOx涂层的SiC颗粒。 TiOx层涂覆的SiC颗粒在高温氮化条件下进行处理或在高温真空中退火,分别形成TiN或TiC涂覆的SiC颗粒。涂覆在SiC颗粒上的TiC层成功地阻止了钨与SiC反应;因此,所提出的工艺成功地制造了SiC / W复合材料。测量了复合材料的机械性能,例如抗压强度和挠曲强度。另外,还研究了SiC对钨的高温氧化烧蚀的影响。 SiC的添加导致钨基复合材料的抗氧化烧蚀性提高。

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