A kind of carbon fiber reinforced magnesium aluminum alloy and preparation method thereof
A magnesium-aluminum alloy and carbon fiber prefabricated technology, applied in the field of magnesium-aluminum alloy materials, can solve problems such as high thermal expansion coefficient, limited application, absolute strength, hardness, and low modulus
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Embodiment 1
[0051] Orthogonal winding carbon fiber preform I was prepared by using mesophase pitch-based carbon fiber pre-oxidized filaments carbonized at 450°C as a raw material. The carbon fiber prefabricated body I is placed in a closed graphite tooling for ultra-high temperature graphitization treatment. The induction heating temperature is 2800°C, the heating rate is 2°C / min, the atmosphere is Ar, and the air pressure is 1 standard atmospheric pressure + 1kPa, so that the low-temperature filament itself The cracked hydrocarbon gas is used as the carbon source, and the self-deposition phenomenon occurs in the closed graphite crucible to obtain the fiber preform II loaded with point-shaped pyrolytic graphite. The fiber preform II is vacuum-impregnated with a xylene solution of zirconium polyacetylacetonate at a concentration of 10g / 100mL; after impregnation, it is dried at 100°C for 1 hour; then it is heat-treated at 1000°C, the atmosphere is Ar, and the pressure is 1 standard atmospher...
Embodiment 2
[0053] The mesophase pitch-based carbon fiber pre-oxidized filaments that were carbonized at a low temperature of 520°C were used as raw materials to prepare the fine-woven punctured carbon fiber preform I. The carbon fiber prefabricated body I is placed in a closed graphite tooling for ultra-high temperature graphitization treatment, the induction heating temperature is 2900°C, the heating rate is 5°C / min, the atmosphere is Ar, the air pressure is 1 standard atmospheric pressure + 2kPa, and the low-temperature filament is self-cracked The hydrocarbon gas is used as the carbon source, and the self-deposition phenomenon occurs in the closed graphite crucible, and the fiber preform II loaded with point-shaped pyrolytic graphite is obtained. The fiber preform II is vacuum-impregnated with a xylene solution of zirconium polyacetylacetonate at a concentration of 30g / 100mL; after impregnation, it is dried at 100°C for 2 hours; then it is heat-treated at 1300°C, the atmosphere is Ar, ...
Embodiment 3
[0055] The mesophase pitch-based carbon fiber pre-oxidized filaments that were carbonized at 600°C were used as raw materials to prepare the fine-woven punctured carbon fiber preform I. The carbon fiber prefabricated body I is placed in a closed graphite tooling for ultra-high temperature graphitization treatment. The induction heating temperature is 3000°C, the heating rate is 10°C / min, the atmosphere is Ar, the air pressure is 1 standard atmospheric pressure + 3kPa, and the low-temperature filament is cracked by itself The hydrocarbon gas is used as the carbon source, and the self-deposition phenomenon occurs in the closed graphite crucible, and the fiber preform II loaded with point-shaped pyrolytic graphite is obtained. The fiber preform II was vacuum-impregnated with a xylene solution of zirconium polyacetylacetonate at a concentration of 50g / 100mL; after impregnation, it was dried at 100°C for 4 hours; then it was heat-treated at 1600°C, the atmosphere was Ar, and the pre...
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Abstract
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