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CN-121554302-B - Carbon-carbon composite material cylinder and preparation method and application thereof

CN121554302BCN 121554302 BCN121554302 BCN 121554302BCN-121554302-B

Abstract

The application provides a carbon-carbon composite material cylinder and a preparation method and application thereof, wherein the preparation method comprises the steps of dipping glue solution on carbon fiber filaments to obtain glued carbon fibers with glue solution volume content of 15% -20%; the method comprises the steps of preparing a cylindrical winding body from glued carbon fibers through a wet winding process, wherein the winding mode of the glued carbon fibers in the wet winding process is longitudinal plane winding, circumferential plane winding and spiral winding and is cross-conducted, solidifying the cylindrical winding body to obtain a resin-based composite material blank, placing the blank in chemical vapor deposition equipment for primary carbonization and chemical vapor deposition densification to obtain a carbon-carbon composite material blank, sequentially carrying out mechanical processing, impregnation carbonization densification and graphitization on the blank to obtain a semi-finished product of the carbon-carbon composite material, and preparing a surface pyrolytic carbon layer after the semi-finished product is subjected to mechanical processing and surface polishing. The carbon-carbon composite material cylinder has higher strength and longer service life.

Inventors

  • WEI YIQIANG
  • ZHOU GANG
  • Xiang Lixue
  • WU KANGDI
  • LI ZHOU
  • Kang Fangchen

Assignees

  • 诸暨市幄肯中智新材料有限公司

Dates

Publication Date
20260505
Application Date
20260123

Claims (8)

  1. 1. The preparation method of the carbon-carbon composite material cylinder is characterized by comprising the following steps of: Dipping and soaking glue solution on the carbon fiber filaments to obtain glued carbon fibers with glue solution volume content of 15% -20%; The method comprises the steps of manufacturing the rubberized carbon fibers into a cylindrical winding body through a wet winding process, wherein the winding mode of the rubberized carbon fibers in the wet winding process is longitudinal plane winding, annular plane winding and spiral winding which are performed in a crossed manner; curing the cylindrical winding body to obtain a resin matrix composite blank; placing the resin matrix composite blank in chemical vapor deposition equipment, and carrying out primary carbonization treatment and chemical vapor deposition densification treatment in the same furnace to obtain a carbon-carbon composite blank; Sequentially carrying out machining, impregnation carbonization densification and graphitization on the carbon-carbon composite material blank to obtain a carbon-carbon composite material semi-finished product; After machining and surface polishing are carried out on the carbon-carbon composite material semi-finished product, preparing a surface pyrolytic carbon layer, and obtaining the carbon-carbon composite material cylinder; The impregnating glue solution comprises, by mass, 1-2 parts of absolute ethyl alcohol, 1-2 parts of phenolic resin and 0.001-0.002 part of silane coupling agent; The wet winding process comprises the following steps of: Winding the rubberized carbon fibers on a core mold in a longitudinal plane winding manner to complete the first layer of winding, then completing the second layer of winding in a circumferential plane winding manner, and then completing the third layer of winding in a spiral winding manner; after the third layer of winding is completed, sequentially performing a layer of longitudinal plane winding, a layer of circumferential plane winding and a layer of spiral winding as a winding period, and repeatedly winding the glued carbon fiber for 100-150 periods; sequentially carrying out one-layer longitudinal plane winding and nine-layer circumferential plane winding to serve as a winding period, and repeatedly winding the glued carbon fiber for 150-200 periods; and (3) taking one layer of longitudinal plane winding, one layer of circumferential plane winding and one layer of spiral winding as one winding period, and repeatedly winding the glued carbon fiber for 100-150 periods.
  2. 2. The method for preparing a carbon-carbon composite cylinder according to claim 1, wherein the tension of the first layer winding in the wet winding process is 1100 n-1500 n, the winding tension decreases layer by layer with increasing winding layer number, and the tension of the last layer winding is 100 n-150 n.
  3. 3. The method for preparing a carbon-carbon composite cylinder according to any one of claims 1 to 2, wherein the curing process comprises the steps of: The cylindrical winding body and the core mold are placed in a curing furnace together, and the cylindrical winding body is heated and cured in a rotating state, wherein the heating and curing process comprises the steps of curing at room temperature to 100 ℃ for 190-210 min, at 100 ℃ for 190-510 min, at 100-150 ℃ for 390-410 min, at 150 ℃ for 190-510 min, at 150-220 ℃ for 180-220 min and at 220 ℃ for 190-510 min.
  4. 4. The method for preparing a carbon-carbon composite cylinder according to any one of claims 1 to 2, characterized in that the first carbonization treatment and the chemical vapor deposition densification treatment comprise the steps of: The resin-based composite material blank is placed in chemical vapor deposition equipment and is processed according to the following procedures of processing for 500-530 min at room temperature to 200 ℃ under the conditions of nitrogen protection constant pressure of 2.0-3.0 MPa, processing for 90-120 min at 200 ℃ under the conditions of constant temperature and nitrogen protection constant pressure of 2.0-3.0 MPa, processing for 200-240 min at 200 ℃ under the conditions of constant temperature and nitrogen protection constant pressure of 2.0-3.0 MPa, processing for 300-360 min at 600 ℃ under the conditions of constant temperature and nitrogen protection constant pressure of 2.0-3.0 MPa, processing for 240-300 min at 600-800 ℃ under the conditions of vacuumizing to 50Pa, processing for 200-280 min at 800 ℃ under the conditions of continuously introducing carbon source gas and nitrogen under the conditions of 800 Pa-5000 Pa, and continuously introducing carbon source gas and nitrogen under the conditions of 500-5000 Pa under the conditions of constant temperature and pressure of 600 Pa-5000 Pa.
  5. 5. The method for preparing a carbon-carbon composite cylinder according to any one of claims 1 to 2, wherein the impregnation carbonization densification treatment comprises the steps of: Placing the carbon-carbon composite material blank into an impregnating furnace, filling phenolic resin in a vacuum state, standing for 4-5 h, filling nitrogen until the pressure is 4-5 MPa, and maintaining the pressure for 8-10 h to finish impregnation; Discharging resin liquid in the impregnating furnace, vacuumizing to 50-80 kPa, treating at room temperature to 80 ℃ and 50-80 kPa for 95-105 min, treating at 80 ℃ and 50-80 kPa for 55-65 min, treating at 80-180 ℃ and 50-80 kPa for 195-205 min, and treating at 180 ℃ and 100-200 kPa for 495-505 min.
  6. 6. A carbon-carbon composite cylinder, characterized in that it is prepared by the method for preparing a carbon-carbon composite cylinder according to any one of claims 1 to 5.
  7. 7. The carbon-carbon composite cylinder of claim 6, wherein the wall thickness of the carbon-carbon composite cylinder is 100 mm-200 mm.
  8. 8. Use of the carbon-carbon composite cylinder according to claim 6 or 7 in hot press sintering of special ceramics.

Description

Carbon-carbon composite material cylinder and preparation method and application thereof Technical Field The application relates to the technical field of carbon-carbon composite materials, in particular to a carbon-carbon composite material cylinder, a preparation method and application thereof. Background The carbon-carbon composite material is used as one of a few candidate materials which can be normally used in an inert gas protection atmosphere at the temperature of more than 1800 ℃, and has the advantages of high specific strength, high specific modulus, wear resistance, fatigue resistance, corrosion resistance, high temperature resistance, high thermal shock resistance and the like, so that the carbon-carbon composite material is widely applied to various industrial fields. At present, the method is gradually introduced in the field of high-temperature and high-pressure sintering of special ceramics. Because of the carbon-carbon composite material hot-pressing die used in the special ceramic hot-pressing sintering field, a carbon fiber preform is generally prepared by three-dimensional braiding and forming, and then a finished product is obtained by densification and graphitization treatment. The common densification process comprises chemical vapor deposition and liquid phase impregnation carbonization, but the thickness of the wall of the special ceramic hot-pressing sintering hot-pressing mold is relatively thicker and is usually more than 100mm, so that the densification difficulty is higher, the internal porosity is high, the internal defects of the product are more, and the service life is shorter. The common 2.5d needling molding process in the field of carbon-carbon composite material preparation has serious damage to carbon fibers, and the mechanical property of the carbon-carbon composite material cannot meet the use requirement of a carbon-carbon hot-pressing die for the field of special ceramic hot-pressing sintering. At present, in the technology for preparing the carbon-carbon composite material by winding carbon fibers, the preparation of the resin-based composite material is mainly adopted, and thin-wall products are commonly prepared. When preparing a thick-wall carbon-carbon composite material cylinder, the preparation of the carbon-carbon composite material is required to be subjected to carbonization, graphitization and other processes, and obvious problems of expansion, cracking and layering can be generated after the thick-wall resin-based composite material is prepared by a conventional winding process, so that a carbon-carbon hot-pressing die meeting the use requirement can not be basically obtained. Therefore, developing a preparation method capable of obtaining a carbon-carbon composite material cylinder product with high strength and long service life to meet the performance requirement of the special ceramic high-temperature high-pressure sintering field on a hot pressing die has become one of important research directions in the field. Disclosure of Invention Based on the above, the application provides the carbon-carbon composite material cylinder, the preparation method and the application thereof, and the carbon-carbon composite material cylinder has higher strength and longer service life, and can better meet the performance requirements of the special ceramic hot-pressing sintering field on the carbon-carbon hot-pressing die. The technical scheme provided by the application is as follows: According to a first aspect of the present application, there is provided a method for preparing a carbon-carbon composite cylinder, comprising the steps of: Dipping and soaking glue solution on the carbon fiber filaments to obtain glued carbon fibers with glue solution volume content of 15% -20%; The method comprises the steps of manufacturing the rubberized carbon fibers into a cylindrical winding body through a wet winding process, wherein the winding mode of the rubberized carbon fibers in the wet winding process is longitudinal plane winding, annular plane winding and spiral winding which are performed in a crossed manner; curing the cylindrical winding body to obtain a resin matrix composite blank; placing the resin-based composite material blank in chemical vapor deposition equipment, and performing first carbonization treatment and chemical vapor deposition densification treatment to obtain a carbon-carbon composite material blank; Sequentially carrying out machining, impregnation carbonization densification and graphitization on the carbon-carbon composite material blank to obtain a carbon-carbon composite material semi-finished product; and (3) preparing a surface pyrolytic carbon layer after machining and surface polishing the carbon-carbon composite semi-finished product to obtain the carbon-carbon composite cylinder. The preparation method comprises the steps of controlling the volume content of glue solution after the carbon fiber filaments are immersed in the glue so