CAJ | 학술논문

炭材应用广泛,但在高于500℃的有氧气氛中氧化迅速,其结构和性能受到严重影响.为此,采用光聚合巯基/乙烯基聚硅氮烷(PSN-1)陶瓷先驱体在炭材料表面裂解制备抗氧化陶瓷涂层,采用偏光显微镜和X射线衍射技术探讨了涂层对炭材抗氧化性能的影响.结果表明:先驱体溶液浓度为30%时浸渍效果最好;加入质量比(Ti/PSN-1)为1/10～1/5的钛粉时,制备的涂层抗氧化性能最佳,恒温氧化120 min后,失重率仅为18%;最佳的浸渍/裂解循环次数为3次,恒温氧化120 min,失重率为15%;聚硅氮烷经高温裂解后最终生成氮化硅陶瓷.
탄재응용엄범,단재고우500℃적유양기분중양화신속,기결구화성능수도엄중영향.위차,채용광취합구기/을희기취규담완(PSN-1)도자선구체재탄재료표면렬해제비항양화도자도층,채용편광현미경화X사선연사기술탐토료도층대탄재항양화성능적영향.결과표명:선구체용액농도위30%시침지효과최호;가입질량비(Ti/PSN-1)위1/10～1/5적태분시,제비적도층항양화성능최가,항온양화120 min후,실중솔부위18%;최가적침지/렬해순배차수위3차,항온양화120 min,실중솔위15%;취규담완경고온렬해후최종생성담화규도자.
Anti-oxidation ceramic coating was prepared on the sur-face of carbon material via pyrolysis of photopolymerisable thiol-ene polysilazane ceramic precursor. The effect of the anti-oxidation coating on the anti- oxidation behavior of carbon material was investigated by using a polarizing microscope and an X-ray diffraetometer. Results show that the thiol-ene polysilazane ceramic precursor is converted into silicon nitride ceramic after pyrolysis at elevated temperature. The best impregnation effect was achieved when the concentration of the precursor solution was kept at 30%. When the ratio of titanium powders to thiol-ene ce-ramic precursor was 1/10 ～ 1/5, the prepared ceramic coating had the best anti- oxidation behavior and showed weight loss of only 18% after oxidation for 120 min. Besides, the ceramic coat-ing prepared at an optimized impregnation-pyrolysis cycle of three had weight loss of only 15% after oxidation for 120 min.