(中南工業(yè)大學(xué)粉末冶金國家重點(diǎn)室驗(yàn)室， 長沙 410083)
摘 要: 研究了碳纖維前驅(qū)體即預(yù)氧絲在氧化鎂/炭復(fù)合材料中原位碳化及其強(qiáng)化作用。在氧化鎂/炭復(fù)合材料中存在鋁、鎂添加劑時(shí)，預(yù)氧絲原位碳化后具有碳纖維的強(qiáng)度和強(qiáng)化效果。預(yù)氧絲在添加硅粉的氧化鎂/炭材料中原位碳化時(shí)因與硅反應(yīng)失去強(qiáng)度， 在無抗氧化添加物的氧化鎂/炭材料中原位碳化后，預(yù)氧絲因氧化失去強(qiáng)度，對基體無強(qiáng)化作用。
關(guān)鍵字: 碳復(fù)合材料 耐火材料 碳纖維 碳化 纖維強(qiáng)化
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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.
Key words: carbon matrix composite refractory carbon fiber carbonization fiber reinforcement
