炭基PO_4/纳米SiC复合涂层的抗氧化性能  

Oxidation resistance behavior of carbon coated by PO_4/nano-SiC composites

作　　者：孙大航[1] 刘贵山[1] 马铁成[1] 

机构地区：[1]大连轻工业学院化工与材料学院,辽宁大连116034

出　　处：《大连轻工业学院学报》2006年第3期201-203,共3页Journal of Dalian Institute of Light Industry

基　　金：辽宁省教育厅科学研究计划资助项目(05L085)

摘　　要：炭材料具有许多独特的性能,使用于不同领域,但在空气条件下,热稳定性差,使应用范围受限制。本研究的目的在于提高其抗氧化性能。将炭基体材料在真空度为-0.095 MPa下,浸渍于加入适量纳米碳化硅的磷酸溶液中,浸渍后样品900℃固化2 h,在空气中700℃下煅烧1 h进行氧化实验。通过SEM、EDS分析抗氧化涂层的结构和成分,探讨抗氧化机理。结果表明,采用浸渍法制备的PO4/纳米SiC复合涂层均匀致密,对炭材料的抗氧化性能有明显的提高。Carbon materials enjoy a series of good properties, favorable in different applications. How ever, the field is limited owing to oxiding in air at high temperature. This experiment is aimed at im proving its oxidation resistance. Carbon material is impregnated in solution of phosphate acid with suspended nano SiC at -0. 095 MPa, which is solidified in the inert atmosphere （nitrogen） at 900 C for 2 h. Then the carbon material prepared is heated to 700℃ for 1h to calculate the weight loss rate. Using SEM to observe its morphology and EDS to analyze the component and the oxidation resistance behavior, it revals that a uniform coating of PO4/nano-SiC formed is effective to improve the oxidation resistance of the carbon material.

关 键 词：炭材料 磷酸 纳米碳化硅 

分 类 号：TM242[一般工业技术—材料科学与工程]