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首页> 外文会议>第七届国际耐火材料学术会议（ISR2016）论文集 >Effect of Infiltration Slurry Containing Silicon on the Microstructure and Properties of SiC Reticulated Porous Ceramics
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Effect of Infiltration Slurry Containing Silicon on the Microstructure and Properties of SiC Reticulated Porous Ceramics

机译：含硅浸润浆料对SiC网状多孔陶瓷组织和性能的影响

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摘要

Silicon carbide reticulated porous ceramics (SiC RPCs) were fabricated by polymer replica method,followed by vacuum infiltration with different alumina slurries.The effects of infiltration slurry containing silicon and sinter temperature on the strut microstructure and mechanical properties of SiC RPCs were investigated.The results showed that the multilayered struts of SiC-RPCs with aluminosilicate as the outer layer and corundum-mullite as the exterior layer were prepared via reaction bonding after infiltrating slurry containing alumina and silicon.Furthermore,the addition of silicon in infiltrated slurry could promote the formation of mullite and reduce the oxidation rate of silicon carbide during sintering.The compressive strength and thermal shock resistance of specimens with alumina slurry containing silicon were greatly improved in comparison with those of alumina slurry infiltration ones.The enhancement was attributed to the reaction-boned triangular area and outer layer as well as residual compressive stress generated in SiC skeleton led to crack deflection.
机译：采用聚合物复制法制备了碳化硅网状多孔陶瓷（SiC RPCs），然后采用不同的氧化铝浆料进行真空浸渗。研究了含硅浸渗浆料和烧结温度对SiC RPCs支柱组织和力学性能的影响。结果表明，在渗入含铝和硅的浆料后，通过反应结合制备了以铝硅酸盐为外层，刚玉莫来石为外层的SiC-RPCs多层支撑体，此外，在渗透的浆料中添加硅可以促进硅铝的形成。莫来石并降低了烧结过程中碳化硅的氧化速率。与铝浆浸渗相比，含硅铝浆的试样的抗压强度和抗热震性有了很大的提高。这种增强归因于反应结合的三角形区域和外层一样l由于SiC骨架中产生的残余压缩应力导致裂纹变形。

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