聚硅氮烷/BN耐热复合涂层的制备及性能  

Preparation and properties of polysilizane/BN composite thermal-resistant coating

作　　者：万耀明 李静 梁璐 熊瑜 王彦 WAN Yao-ming;LI Jing;LIANG Lu;XIONG Yu;WANG Yan(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095

出　　处：《材料工程》2021年第10期116-122,共7页Journal of Materials Engineering

摘　　要：采用聚硅氮烷作为树脂基体,h-BN作为功能粉体制备复合涂层,通过化学方法对BN进行接枝改性以改善其在复合涂层中的分散,利用FT-IR和TEM对改性前后BN的化学结构进行分析,采用SEM对复合涂层微观形貌结构进行表征,通过对不同树脂含量的复合涂层微观形貌的表征确定了复合涂层最优的树脂含量为50%(质量分数),并对复合涂层的性能进行初步测试分析。结果表明:化学改性的方法成功实现BN的表面接枝,改性后的BN在涂层中的分散性能得到了有效改善,复合涂层表现出较好的阻隔屏蔽性能和耐高温、抗氧化性能。Composite coatings were prepared by using polisilizane as matric resin and h-BN as functional filler.Raw BN was modified by chemical method to improve its distribution in composite coatings.FT-IR and TEM characterizations were applied to analyse the chemical structure of the raw BN and modified BN samples.SEM was used to observe the microstructure of the as-prepared coatings.The optimal resin content was set as 50%(mass fraction)by characterizing the microstructure of composite coatings with varied resin contents.In addition,basic properties of composite coatings were also tested and analysed.The results show that raw BN is successfully modified using chemical method.The modified BN displays better distribution in composite coatings as expected.The as-prepared coatings have good impermeability and thermal-oxidation resistance.

关 键 词：氮化硼 聚硅氮烷 耐热涂料 

分 类 号：V255.5[一般工业技术—材料科学与工程]