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Effect of critical granularity on reliability of Al2O3-C materials
Author(s): 
Pages: 348-350,354
Year: Issue:  5
Journal: Refractories

Keyword:  alumina-carbon refractoriesWeibull distributionmaterial propertyreliability;
Abstract: 选择临界粒度分别为1、0.8、0.6和0.5 mm的亚白刚玉颗粒为骨料,骨料与细粉的质量比为4∶6,以酚醛树脂为结合剂进行配料.混好的物料于60 ℃干燥15 h,以120 MPa压力等静压成型为25 mmx25 mmx 150mm的样条,然后直接在氮气保护气氛下于950℃5 h热处理.采用三参数Weibull分布,研究了临界粒度对Al2O3-C质耐火材料可靠性的影响.结果表明:减小骨料的临界粒度,Al2O3-C材料的Weibull模数m值逐渐增大,材料可靠性增加.分析认为制备过程对Al2O3-C材料的可靠性有较大影响,减小临界粒度,使坯料粒度分布集中,流动性变好,从而有利于Al2O3-C材料可靠性的提高.
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