CAJ | 학술논문

采用硼、碳助剂无压烧结制备碳化硅陶瓷.针对烧结温度与碳化硅烧结体密度、抗弯强度以及硬度之间的关系进行了试验研究,并对不同温度下制备的烧结体进行了显微结构形貌观察和XRD图谱分析.结果表明,烧结温度在2190～2220℃范围内可以制备密度高、力学性能好的碳化硅陶瓷.其相对密度超过96%;抗弯强度接近400MPa;维氏硬度23GPa以上.在试验温度范围内,密度与抗弯强度之间的关系近似为线性关系,密度越高抗弯强度和硬度性能越好.
채용붕、탄조제무압소결제비탄화규도자.침대소결온도여탄화규소결체밀도、항만강도이급경도지간적관계진행료시험연구,병대불동온도하제비적소결체진행료현미결구형모관찰화XRD도보분석.결과표명,소결온도재2190～2220℃범위내가이제비밀도고、역학성능호적탄화규도자.기상대밀도초과96%;항만강도접근400MPa;유씨경도23GPa이상.재시험온도범위내,밀도여항만강도지간적관계근사위선성관계,밀도월고항만강도화경도성능월호.
Pressureless sintering of silicon carbide with C、B as sintering additives were carried out. The influence of sintering temperature on mechanical properties of silicon carbide ceramics was investigated. Microstructure and XRD pattern of the sintered bodies at different sintering temperature were analyzed. The results show that dense SiC ceramics with good mechanical properties are obtained at sintering temperature of 2190～2220℃. It has relative density of more than 96%;bending strength of near 400MPa; Vickers hardness of more than 23GPa. In the testing temperature range, the relation curve between density and bending strength is approximate to linear one. The higher density, the better is the bending strength and the hardness.