建筑用C/C复合材料表面ZrB2+SiC复合粉末涂层性能的表征  

Characterization of ZrB2+SiC composite powder coating on C/C composite surface for building

作　　者：唐徐林[1] TANG Xu-lin(YangZhou Polytechnic Institute,Yangzhou 225100,China)

机构地区：[1]扬州工业职业技术学院,江苏扬州225100

出　　处：《粉末冶金工业》2020年第3期68-72,共5页Powder Metallurgy Industry

摘　　要：运用感应等离子球化(induced plasma spherification,IPS)技术,在建筑用C/C复合材料表面制备ZrB2+SiC复合涂层,通过实验研究Si粉含量对涂层组织和性能的影响。结果表明:涂层组织中含有主相ZrB2与ZrSi2,也存在部分Si。涂层中形成了复合陶瓷结构,主要由SiC含量较高的灰色颗粒与ZrB2含量较高的白色颗粒构成。通过IPS处理,SiC被分解成C与Si的蒸气,粉末表层温度比芯部更高,表层SiC分解更快。产物中灰色与白色颗粒都发生了聚集,基体中形成了大量孔洞,不同颗粒之间紧密结合。IPS处理得到粒径小于等于20μm的球形与椭球形颗粒,部分粉末表面存在絮状物。Induced plasma spherification(IPS)method was used to prepare ZrB2+SiC composite coatings on the surface of C/C composite materials used in construction. The effects of SiC particle content on the microstructure and properties of the coatings were studied.The results show that the main phases ZrB2 and ZrSi2 are contained in the coating,and some Si are present too.The composite ceramic structure is formed in the coating product,which is mainly composed of gray particles with higher SiC content and white particles with higher ZrB2 content.After IPS treatment,SiC is decomposed into vapors of C and Si,the surface layer of the powder has a higher temperature than the core,which leads to faster decomposition of the surface SiC.The gray and white particles are aggregated,and a large number of pore structures are formed in the matrix of the products,different particles form a tight bonding state.Spherical and ellipsoidal particles with particle size less than 20 μm are obtained by IPS treatment.

关 键 词：ZrB2+SiC复合粉末 等离子球化 致密度 共晶组织 

分 类 号：TB332[一般工业技术—材料科学与工程] TU599[建筑科学—建筑技术科学]