放电等离子烧结
材料科学
微观结构
复合材料
相对密度
烧结
维氏硬度试验
碳化硼
等离子体
相(物质)
色散(光学)
物理
化学
有机化学
量子力学
光学
作者
Filiz Çınar Şahin,Burcu Apak,Ipek Akin,H. Kanbur,Didem H. Genckan,Ahmet Turan,Gültekin Göller,Onuralp Yücel
标识
DOI:10.1016/j.solidstatesciences.2012.05.037
摘要
B4C–SiC composites were produced using spark plasma sintering (SPS) both reactively from B4C–SiO2–C starting powders and directly from B4C–SiC at 1700 and 1750 °C under a pressure of 40 MPa. Densification, microstructure and mechanical properties of B4C–SiC composites were investigated. 98.8% relative density was obtained with the addition of Y2O3 in directly spark plasma sintered sample containing 10% SiC at 1750 °C for 5 min. In reactive spark plasma sintering, increasing SiC content resulted in a decrease in density because of the oxidation of SiC to SiO gas phase. The glassy phases formed with Y2O3 addition caused the Vickers hardness values to increase. SiC phase showed a homogenous dispersion in B4C matrix.
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