BAS系微晶玻璃抗氧化涂层的制备与性能  

Preparation and properties of BAS glass-ceramics based anti-oxidation coatings

作　　者：芦玉峰[1,2] 周萌[1] 范成洲[1] 郑晓慧[2] 吴剑锋[2] 堵永国[2] 肖加余[2] 

机构地区：[1]西北核技术研究所,西安710024 [2]国防科技大学航天与材料工程学院,长沙410073

出　　处：《复合材料学报》2011年第3期74-79,共6页Acta Materiae Compositae Sinica

基　　金：国家"863"计划(2004AA32G090)

摘　　要：利用2层不同软化温度和不同热膨胀系数的BaO-Al2O3-SiO2(BAS)系微晶玻璃,采用浆料涂覆—浸渍—多层共烧的方法制备了2种双层同组分和1种双层不同组分的Cf/SiC复合材料抗氧化涂层。3种结构的BAS系微晶玻璃涂层完整、无明显缺陷,涂层与Cf/SiC复合材料的结合状态良好,有助于提高Cf/SiC复合材料的抗氧化性能。双层不同组分的BAS系微晶玻璃涂层在1200～1350℃范围内对提高Cf/SiC复合材料抗氧化性能的作用显著,失重速率和失重量均明显减小。与未包覆涂层的复合材料相比,包覆双层不同组分涂层的复合材料经历600次(每次保温10 min)热冲击后的失重降低了1/2～2/3,保留的强度提高了7～15倍。Two kinds of BaO-Al2O3-SiO2（BAS） glass-ceramics with different soften points and thermal expansion coefficients were employed to prepare three kinds of gradient coatings for carbon fiber reinforced silicon carbide（Cf/SiC） composite.These coatings were fabricated with slurry deposition combined dipping method and multi-co-firing technology.These BAS glass-ceramics based coatings were integrated and defect-free.The coatings and the composites bind tightly,which can improve the anti-oxidation performance of the coated Cf/SiC composite.All coating systems can protect Cf/SiC composite from oxidation.The graded coatings protect Cf/SiC composite markedly,and the mass loss rate and mass loss of coated composites are reduced greatly within 1200～1350℃.Compared with uncoated composite,the mass loss of the coated composite is reduced by 1/2～2/3,and the reminant bending strength is enhanced 7～15 times after 600 thermal shock cycles in the experimental range.

关 键 词：复合材料 CF/SIC 抗氧化涂层 微晶玻璃 钡长石 

分 类 号：TB332[一般工业技术—材料科学与工程] TG171[金属学及工艺—金属表面处理]