【摘要】 以莫来石、红柱石、氮化硅、碳化硅为主要原料,在空气气氛下烧成制备碳化硅-氮化硅-莫来石复相材料,并采用XRD、SEM样品进行了表征。结果表明:碳化硅化硅-氮化硅-莫来石复合材料在烧结过程中会在试样表面形成氧化层,分为氧化膜和致密层。氧化膜的主要成分为Si O2,其主要是碳化硅和氮化硅的氧化产物,随着试样中氮化硅含量的增加,试样表面形成的Si O2逐渐增多;试样截面出现致密层,随着试样中氮化硅含量的增加,试样的致密层厚度逐渐减小。更多还原

【Abstract】 The silicon nitride silicon mullite composites was prepared by using mullite,andalusite,silicon nitride and silicon carbide as the main raw material,sintered under the air atmosphere. The prepared samples were characterized by XRD and SEM. The results show that the silicon nitride silicon mullite composites will form a layer of oxide film on the surface of the specimen in the sintering process,the main component of the oxidation film is Si O2,which is mainly the oxidation product of silicon carbide and silicon nitride,with the increase of the content of silicon nitride in the samples,the Si O2increased; The section of samples appear dense layer,with the increase of silicon nitride content in the samples,the thickness of the dense layer decreases gradually.更多还原