硅粉加入量对碳纤维增强铝碳耐火材料显微结构和强度的影响

发布时间：2018-06-14 00:46

  本文选题：硅粉加入量 + 碳纤维复合铝碳耐火材料　； 参考：《硅酸盐通报》2017年06期

【摘要】：以电熔白刚玉、石墨、硅粉和碳纤维为主要原料,通过固定刚玉细粉和硅粉总含量(29%),改变硅粉加入量(0~20%)制得了六组碳纤维增强铝碳耐火材料。采用XRD、SEM及EDS等研究了硅粉加入量对不同温度处理后材料物相组成、显微结构及强度的影响。结果表明:(1)220℃热处理后,硅粉含量低于8%时,抗折耐压强度变化不大;硅粉的含量高于8%时,抗折与耐压强度均降低。(2)1400℃热处理后,当硅粉含量从0增加到8%时,耐压强度与抗折强度均得到明显改善。而当硅粉量进一步增加时,试样出现裂纹,强度显著下降。(3)综合考虑,硅粉的最佳加入量为8%,此时经220℃、1400℃热处理后材料具有最好的抗折强度及耐压强度。
[Abstract]:Using fused white corundum, graphite, silica fume and carbon fiber as main raw materials, six groups of carbon fiber reinforced aluminum carbon refractories were prepared by fixing the total content of corundum fine powder and silica powder and changing the content of silica powder. The effects of the amount of silicon powder on the phase composition, microstructure and strength of the materials after different temperature treatments were studied by means of XRDX SEM and EDS. The results show that after heat treatment at 220 鈩，

本文编号：2016270