C/C复合材料的抗热应力因素  

THERMAL SHOCK RESISTANCE OF C/C COMPOSITES

作　　者：邓景屹[1] 刘文川[1] 杜海峰[1] 

机构地区：[1]中国科学院金属研究所,沈阳市110016

出　　处：《材料研究学报》2001年第3期372-374,共3页Chinese Journal of Materials Research

基　　金：八六三计划新材料领域资助项目 715-011-0140

摘　　要：根据在室温与 ２５００ ℃之间测量的石墨化与未石墨化 Ｃ／Ｃ复合材料的强度．弹性模量、热导率和热膨胀系数，计算出两种材料抗热应力因素随温度的变化结果表明，石墨化材料抗热应力能力总是好于未石墨化材料；未石墨化 Ｃ／Ｃ材料在 １３００ ℃左右抗热应力因素出现最低点，预示这种复合材料在这个温度附近由于热应力损毁的可能性最大．The strength, modulus. thermal conductivity and coefficient of thermal expansion of graphitized and non--graphitized C/C materials in the temperature range from 25 ℃ to 2500 ℃ were measured. Thermal Stress resistance (TSR) of C/C composites were calculated at elevated temperature. The results show that TSR of the non--graphitized is always greater than that of the graphitized at whole range of temperature measured. TSR of non-graphitized C/C appears the minimum value at 1300 ℃ and maximum possibility of catastrophic failure because thermal stress may occur in the vicinity o f this temperature.

关 键 词：抗热应力因素 热导率 热膨胀系数 碳/碳复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]