摘要
分别采用无压及热压反应烧结方式,在氮气条件下制备了AlON-AlN复相陶瓷,研究了烧结温度和保温时间对AlON-AlN复相陶瓷的显微结构、气孔率、抗弯强度及热导率的影响规律。结果表明:相同烧结条件下,热压烧结比无压烧结更易获得气孔率低、抗弯强度高、热导率大的AlON-AlN复相陶瓷。无压烧结复合陶瓷的断裂为沿晶断裂和穿晶断裂的混合模式,而热压烧结复合陶瓷的断裂方式主要为穿晶断裂。
AlON-AlN composite ceramics were prepared under nitrogen protection using pressureless sintering and hot-press sintering,respectively. The effects of sintering temperature and soaking time on microstructure,porosity,bending strength and thermal conductivity of AlON-AlN composite ceramic were studied in this paper. The results show that compared with pressureless sintered AlON-AlN composite ceramics,the hot-press sintered samples appear to get lower porosity,higher bending strength and greater thermal conductivity under the same sintering conditions. The fracture mode of pressureless sintered composite ceramic is intergranular fracture and transgranular fracture,but the fracture mode of hot-press sintered composite ceramic is mainly transgranular fracture.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2015年第6期1625-1629,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金青年基金(11405140)
四川省教育厅项目基金(14ZB0103)
西南科技大学博士基金(11zx7110
10zx7113)
