Preparation method of reinforced carbon-based composite material of carbon foam preform
A composite material and carbon foam technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of poor toughness, poor densification effect, low strength and modulus, and achieve low cost, good densification effect, The effect of high strength and modulus
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[0022] Example one :
[0023] The phenolic resin, surfactant, foaming agent, and curing agent are uniformly stirred according to the mass percentage of 100:5:5:25, and then 3wt.% chopped carbon fiber is added for thorough mixing. The combination of ultrasonic oscillation makes the mixture uniformly dispersed. Among them, the phenolic resin is a liquid resol (viscosity (25°C): 100~120mPa·s); the surfactant is Tween-80; the foaming agent is sodium bicarbonate; and the curing agent is P-toluenesulfonic acid; among them, the chopped carbon fiber has a diameter of 15-20μm and a length of 8-10mm. In a preheated oven (80°C), it is heated for foaming and curing to obtain carbon fiber reinforced phenolic foam. The phenolic foam is placed in a vacuum carbonization furnace, heated to 1000°C at a temperature increase rate of 10°C / h under a low vacuum of 1Pa and kept for 2 hours to obtain a carbon fiber reinforced carbon foam preform. At a temperature of 1100°C, the deposition pressure is ...
Example Embodiment
[0025] Example two :
[0026] The phenolic resin, surfactant, foaming agent, and curing agent are uniformly stirred according to the mass percentage of 100:5:5:25, and then 7wt.% chopped carbon fiber is added for thorough mixing, and mechanically stirred and mixed The combination of ultrasonic oscillation makes the mixture uniformly dispersed. Among them, the phenolic resin is a liquid resol (viscosity (25°C): 100~120mPa·s); the surfactant is Tween-80; the foaming agent is sodium bicarbonate; and the curing agent is P-toluenesulfonic acid; among them, the chopped carbon fiber has a diameter of 15-20μm and a length of 8-10mm. In a preheated oven (80°C), it is heated for foaming and curing to obtain carbon fiber reinforced phenolic foam. The phenolic foam is placed in a vacuum carbonization furnace, heated to 1000°C at a temperature increase rate of 10°C / h under a low vacuum of 1Pa and kept for 2 hours to obtain a carbon fiber reinforced carbon foam preform. At a temperature of...
Example Embodiment
[0028] Example three :
[0029] The phenolic resin, surfactant, foaming agent, and curing agent are uniformly stirred according to the mass percentage of 100:5:5:25, and then 10wt.% chopped carbon fiber is added for thorough mixing. The combination of ultrasonic oscillation makes the mixture uniformly dispersed. Among them, the phenolic resin is a liquid resol (viscosity (25°C): 100~120mPa·s); the surfactant is Tween-80; the foaming agent is sodium bicarbonate; and the curing agent is P-toluenesulfonic acid; among them, the chopped carbon fiber has a diameter of 15-20μm and a length of 8-10mm. In a preheated oven (80°C), it is heated for foaming and curing to obtain carbon fiber reinforced phenolic foam. The phenolic foam is placed in a vacuum carbonization furnace, heated to 1000°C at a temperature increase rate of 10°C / h under a low vacuum of 1Pa and kept for 2 hours to obtain a carbon fiber reinforced carbon foam preform. At a temperature of 1100°C, the deposition pressure...
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