Spark plasma sintering of B4C-SiC composites

作者：Sahin Filiz Cinar^*; Apak Burcu; Akin Ipek; Kanbur Halide E; Genckan Didem H; Turan Ahmet; Goller Gultekin; Yucel Onuralp

来源：Solid State Sciences, 2012, 14(11-12): 1660-1663.

DOI：10.1016/j.solidstatesciences.2012.05.037

• Spark plasma sintering
• X-ray methods
• B4C
• SiC
• Microstructure final

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 degrees 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 degrees 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.

• 出版日期2012-11