预氧丝在氧化镁/炭复合材料中的原位碳化及其强化作用
来源期刊:中国有色金属学报1997年第3期
论文作者:陈康华 汤中华 许雄亮 刘红卫
文章页码:77 - 81
关键词:碳复合材料 耐火材料 碳纤维 碳化 纤维强化
Key words:carbon matrix composite refractory carbon fiber carbonization fiber reinforcement
摘 要:研究了碳纤维前驱体即预氧丝在氧化镁/炭复合材料中原位碳化及其强化作用。在氧化镁/炭复合材料中存在铝、镁添加剂时,预氧丝原位碳化后具有碳纤维的强度和强化效果。预氧丝在添加硅粉的氧化镁/炭材料中原位碳化时因与硅反应失去强度, 在无抗氧化添加物的氧化镁/炭材料中原位碳化后,预氧丝因氧化失去强度,对基体无强化作用。
Abstract: The in-situ carbonization and reinforcing effect of carbon fiber precursor in MgO-C composite were investigated. The precursor, after in-situ carbonizing in MgO-C composite containing Al and Mg powders, has the same strength and reinforcing effect as the carbon fiber. The precursor carbonized in MgO-C composite containing silicon powder has very low strength, because of the reaction between the precursor and silicon. Carbonized in MgO-C composite without any addition, the precursor has so low strength that it has not positive effect on the strength of the composite.