摘要
采用超重力燃烧工艺制备了TiB2基陶瓷复合材料,用阿基米德排水法测得其体积密度为4.72 g/cm^3。通过微观结构分析,发现陶瓷颗粒间存在许多小于3μm的微孔洞且分布不均匀。在加载速率为0.5 mm/min的准静态条件下进行单轴抗压试验,以Weibull分布为假设分布,对测得的强度数据用数理统计的方法进行分析。经过Kolmogorov非参数检验,得出该陶瓷复合材料的准静态单轴抗压强度分布规律可以用模数系数为3.04834,最小抗压强度为0 MPa的两参数Weibull分布表征,预测了其平均强度为530 MPa。
TiB2 composites were prepared by supergravity combustion process, and the volume density was 4.72 g/cm^3 measured by Archimedes displacement method.Through microstructure analysis, it was found that there were many micropores less than 3 μm between the ceramic particles and the distribution was not uniform.The uniaxial compression test was carried out under quasi-static conditions with a loading rate of 0.5 mm/min. The Weibull distribution was taken as the assumed distribution to analyze the measured strength data by mathematical statistics.After the Kolmogorov nonparametric test, the distribution law of quasi-static uniaxial compressive strength of this composites could be characterized by two-parameter Weibull distribution with modulus coefficient of 3.04834 and minimum compressive strength of 0 MPa, and the average strength of this composites was predicted to be 530 MPa.
作者
陈辉
邓勇军
姚勇
黄雪刚
唐群轶
CHEN Hui;DENG Yongjun;YAO Yong;HUANG Xuegang;TANG Qunyi(School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, 621000,China;The Sichuan Key Laboratory of Engineering Materials and Structures;Hypervelocity Aerodynamics Institute, China Aerodynamics Research & Development Center, Mianyang ,621000,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2019年第10期24-29,34,共7页
China Ceramics
基金
中国空气动力研究与发展中心超高速碰撞研究中心开放基金资助(20181101,20190101)
