摘要
对炭布叠层针刺C/C复合材料分别进行了不同温度的高温热处理,研究了热处理温度对C/C复合材料热学、力学和抗热震等性能的影响。结果表明,经过高温热处理,针刺C/C复合材料的导热率升高,线膨胀系数降低,材料的抗热震因子从未处理的42 kW/m提高到70 kW/m以上,表明热处理后材料具有更佳的热稳定性,但材料的弯曲强度随热处理的升高从126 MPa降到70 MPa,且经过2 000℃及更高温度处理后弯曲强度降低幅度较大。
The effects of heat treatment temperature on the thermal properties, mechanical properties and thermal shock resist- ance of needling carbon/carbon composites were studied in this paper. The results show that after high-temperature treatment, ther- mal conductivity of C/C composites increase ,while their coefficient of thermal expansion decrease. The thermal stress factor is found to be improved from 42 kW/m to above 70 kW/m in this process. Thus heat treatment is helpful for improving the thermal shock re- sistance of needling carbon/carbon composites. However,the flexural strength of needling carbon/carbon composites decrease grad- ually from 126 MPa to 70 MPa with the increasing heat treatment temperature, especially treated at 2 000 ℃ or even higher tempera- ture.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2013年第1期101-106,共6页
Journal of Solid Rocket Technology
基金
Supported by the National Defence Foundational Research of China(C0320110006)
General Armament Department Foundational of China(9140A28011012HT43325)
关键词
针刺C
C复合材料
高温处理
热学性能
弯曲性能
抗热震性能
needling carbon/carbon composite
heat treatment
thermal properties
flexural properties
thermal shock resistance
