摘要
利用快速通电加热测试技术,模拟混杂碳/碳复合材料的超高温工作环境,测试了材料不同温度下的拉伸、压缩力学性能,得到了材料的拉伸、压缩强度与模量随温度的变化规律,并给出了相应的拟合曲线。结果表明:材料的强度和模量在一定范围内随温度的升高而增加,在2000K～2400K之间达到最大值,当温度超过2700K后迅速下降。材料轴向的拉伸、压缩性能随温度的变化较横向缓慢,强度的变化范围较模量的小。
Applying the fast electric heating technique, the ultra-high temperature condition of hybrid carbon-carbon composites in practice is simulated. Then their tensile and compressive mechanical properties are measured, both the strength and the modulus in the longitudinal and transverse directions of composites are obtained, and simple regressive polynomial fit curves are given also. Results show that both the strength and the modulus increase with the increase of temperature in a certain range, and get the peak at 2000 K - 2400 K, and drop quickly after 2700 K. Furthermore, the tensile and compressive properties change more slowly in the longitudinal direction than in the transverse direction, and also the strength changes in a narrower range than the modulus.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2003年第2期118-122,共5页
Acta Materiae Compositae Sinica
基金
国家自然科学基金资助项目(19932030
10102005)
关键词
混杂碳/碳复合材料
超高温
力学性能
Electric heating
High temperature effects
Mechanical properties
Tensile properties
