摘要
通过热压烧结技术，ＳｉＣ、ＡｌＮ和Ｙ２Ｏ３粉末混合作在１９２０～２０５０℃、Ａｒ气氛下形成了致密的复相陶瓷．在室温下ＳｉＣ－ＡｌＮ－Ｙ２Ｏ３复相材料的抗弯强度和断裂韧性分别达到６００ＭＰａ和７ＭＰａ·ｍ１／２以上运用ＸＲＤ、ＳＥＭ和ＴＥＭ分析致密样品的断裂裂纹、形貌和组成．ＳｉＣ－ＡｌＮ－Ｙ２Ｏ３复相陶瓷在１３７０℃氧化试验３０ｈ，其氧化产物为莫来石．
By using an optimum hot press (HP) processl SiC, AIN and Y2O3 powder manure formed a solid solution at 1920 to 2050℃ in Ar environment. The properties of the SiC-AIN-Y2O3 multiphase ceramic were as follows: bending strength more than 600MPa and fracture toughness more than 7MPa·m1/2 at room temperature. The dense samples were examined by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) to determine the fracture structure, interface and crack spread etc. The product of SiC-AIN-Y2O3 multiphase ceramic oxidized at 1370℃ for 30h was mullite.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第2期189-192,共4页
Journal of Inorganic Materials
基金
863高技术项目
关键词
碳化硅
氮化铝
复相陶瓷
氧化钇
制备
机械性能
silicon carbide, aluminum nitride, solid solution, multiphase ceramic, oxidization
