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Main issue

Release date:

2018-11-01

(1) Mechanical properties of carbon/carbon composites: They exhibit high specific strength (the ratio of strength to density), specific modulus (the ratio of modulus to density), and fracture toughness.

(2) High-temperature performance of carbon/carbon composites: Resistant to temperatures exceeding 3000°C, with excellent thermal shock resistance and ablation resistance.

(3) Service environment of carbon/carbon composites: Oxidation begins at 370°C in air, so they must be used under vacuum or in a protective atmosphere at elevated temperatures.

(4) Designability of carbon/carbon composites: They can achieve characteristics such as "high thermal conductivity—thermal insulation," "high hardness—low hardness," "good electrical conductivity—low conductivity," "high coefficient of friction—low coefficient of friction," and "positive thermal expansion coefficient—negative thermal expansion coefficient."

(5) The properties of carbon/carbon composites do not have a direct correlation with density; rather, density is merely one physical property indicator.

(6) Carbon/carbon composites exhibit excellent high-temperature mechanical properties, but not at room temperature.

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