Carbon fiber board heat resistance test method

Carbon fiber board is widely used in aerospace, automobile manufacturing, building reinforcement and other fields due to its excellent mechanical properties and lightweight characteristics. However, the performance of carbon fiber board in high temperature environment is also one of the important indicators for evaluating its applicability. This article will introduce the test method of heat resistance of carbon fiber board in detail.

1. Thermogravimetric analysis (TGA)

Thermogravimetric analysis is a method to evaluate the thermal stability of a material by measuring the mass change of the material during heating. This method can be used to evaluate the decomposition behavior and heat resistance of carbon fiber board at high temperature.

- Test standard: ASTME1131-18 "Test method for determining the thermal stability of materials by thermogravimetric analysis"
- Test method: Place the carbon fiber board sample in a thermogravimetric analyzer, heat it at a constant rate, record the mass change of the sample at different temperatures, draw a mass-temperature curve, and analyze the thermal decomposition temperature and thermal stability of the material.

2. Differential scanning calorimetry (DSC)

Differential scanning calorimetry is a method to evaluate the thermal properties of a material by measuring the heat released or absorbed by the material during heating. This method can be used to evaluate the glass transition temperature, melting point and thermal decomposition temperature of carbon fiber boards.

- Test standard: ASTMD3418-15 "Test method for determining the glass transition temperature of plastics by differential scanning calorimetry (DSC)"
- Test method: Place the carbon fiber board sample in a differential scanning calorimeter, heat it at a constant rate, record the heat flow change of the sample at different temperatures, draw a heat flow-temperature curve, and analyze the glass transition temperature, melting point and thermal decomposition temperature of the material.

3. Thermal expansion coefficient test

The thermal expansion coefficient is a parameter that measures the dimensional change of a material when the temperature changes. By measuring the linear expansion coefficient of a carbon fiber board at different temperatures, its dimensional stability in a high temperature environment can be evaluated.

- Test standard: ASTME228-19 "Standard test method for linear expansion coefficient of solid materials"
- Test method: Place the carbon fiber board sample in a thermal expansion instrument, heat it at a constant rate, record the length change of the sample at different temperatures, and calculate the thermal expansion coefficient.

4. High temperature tensile test

High temperature tensile test is a method to evaluate the heat resistance of carbon fiber plates by performing tensile tests on them under high temperature. This method can be used to evaluate the mechanical properties of materials such as tensile strength and elastic modulus at high temperature.

- Test standard: ASTMD638-14 "Standard Test Method for Tensile Properties of Plastics"

- Test method: Clamp the carbon fiber plate specimen on a high temperature tensile tester, set the test temperature, apply tensile force at a constant speed, record the load-displacement curve of the specimen, and calculate the tensile strength and elastic modulus.

5. High temperature bending test

High temperature bending test is a method to evaluate the heat resistance of carbon fiber plates by performing bending tests on them under high temperature. This method can be used to evaluate the mechanical properties of materials such as bending strength and bending modulus at high temperature.

- Test standard: ASTMD790-17 "Standard Test Method for Bending Properties of Plastics"

- Test method: Place the carbon fiber plate specimen on a high temperature bending tester, set the test temperature, apply bending force at a constant speed, record the load-displacement curve of the specimen, and calculate the bending strength and bending modulus.

Conclusion

The heat resistance test methods of carbon fiber boards include thermogravimetric analysis, differential scanning calorimetry, thermal expansion coefficient test, high temperature tensile test and high temperature bending test. By testing and evaluating these indicators, we can understand the performance of materials in high temperature environments and provide a scientific basis for their application in different fields.

If you have more questions about the heat resistance test methods of carbon fiber boards, please feel free to ask questions.