A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of carbon/carbon composite material thin-walled cylinder
The invention provides a preparation method of a carbon/carbon composite material thin-walled cylinder, and is used for solving the problems of long period, low efficiency and low product strength ofa carbon/carbon composite cylinder preparation process in the prior art. The preparation method of the carbon/carbon composite material thin-walled cylinder comprises the steps: electrifying and heating a carbon fiber cylinder prefabricated body in a vacuum deposition chamber, and internally heating the cylinder, so as to enable the cylinder prefabricated body to be non-uniformly heated on cylinder walls with different radial wall thicknesses and have a temperature gradient; and introducing a deposition carbon source mixed gas into the vacuum deposition chamber, and carrying out uniform carburization in carbon fibers of the cylinder wall based on the temperature gradient to obtain the carbon/carbon composite material thin-walled cylinder with the density of 1.5-1.8 g/cm<3>. According to the invention, the positions with different thicknesses on the cylinder wall have uniform carburization amount, the mechanical strength is improved, the service life is prolonged, an external heat source is not needed to provide high temperature, the energy consumption is reduced, the production period is shortened, the production efficiency is improved, and batch production can be realized.
本发明提供了一种碳/碳复合材料薄壁圆筒的制备方法，用以解决现有技术中碳/碳复合圆筒制备工艺周期长、效率低、产品强度低的问题。所述碳/碳复合材料薄壁圆筒的制备方法，在真空沉积室中通电加热碳纤维圆筒预制体，通过对圆筒的内加热，使圆筒预制体在不同径向壁厚的圆筒壁上受热不均匀，具有温度梯度；在真空沉积室内引入沉积碳源混合气体，在圆筒壁的碳纤维内基于温度梯度进行均匀渗碳，得到密度为1.5～1.8g/cm3的碳/碳复合材料薄壁圆筒。本发明使得圆筒壁上不同厚度处具有均匀的渗碳量，提高了机械强度和寿命，同时不需要外界热源提供高温，降低了能耗，缩短了生产周期、提高了生产效率，可实现批量生产。
Preparation method of carbon/carbon composite material thin-walled cylinder
The invention provides a preparation method of a carbon/carbon composite material thin-walled cylinder, and is used for solving the problems of long period, low efficiency and low product strength ofa carbon/carbon composite cylinder preparation process in the prior art. The preparation method of the carbon/carbon composite material thin-walled cylinder comprises the steps: electrifying and heating a carbon fiber cylinder prefabricated body in a vacuum deposition chamber, and internally heating the cylinder, so as to enable the cylinder prefabricated body to be non-uniformly heated on cylinder walls with different radial wall thicknesses and have a temperature gradient; and introducing a deposition carbon source mixed gas into the vacuum deposition chamber, and carrying out uniform carburization in carbon fibers of the cylinder wall based on the temperature gradient to obtain the carbon/carbon composite material thin-walled cylinder with the density of 1.5-1.8 g/cm<3>. According to the invention, the positions with different thicknesses on the cylinder wall have uniform carburization amount, the mechanical strength is improved, the service life is prolonged, an external heat source is not needed to provide high temperature, the energy consumption is reduced, the production period is shortened, the production efficiency is improved, and batch production can be realized.
本发明提供了一种碳/碳复合材料薄壁圆筒的制备方法，用以解决现有技术中碳/碳复合圆筒制备工艺周期长、效率低、产品强度低的问题。所述碳/碳复合材料薄壁圆筒的制备方法，在真空沉积室中通电加热碳纤维圆筒预制体，通过对圆筒的内加热，使圆筒预制体在不同径向壁厚的圆筒壁上受热不均匀，具有温度梯度；在真空沉积室内引入沉积碳源混合气体，在圆筒壁的碳纤维内基于温度梯度进行均匀渗碳，得到密度为1.5～1.8g/cm3的碳/碳复合材料薄壁圆筒。本发明使得圆筒壁上不同厚度处具有均匀的渗碳量，提高了机械强度和寿命，同时不需要外界热源提供高温，降低了能耗，缩短了生产周期、提高了生产效率，可实现批量生产。
Preparation method of carbon/carbon composite material thin-walled cylinder
一种碳/碳复合材料薄壁圆筒的制备方法
ZHU RUIYUAN (author) / JIA HONG (author)
2021-03-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023
| European Patent Office | 2021
| European Patent Office | 2023