High temperature resistant composite materials (C/C, C/SiC, etc.) have excellent properties such as lightweight and high strength, high temperature resistance, oxidation and erosion resistance, thermal stability, and friction resistance. They are an advanced thermal structural material with important strategic significance and have broad application prospects in aerospace, defense and military industries, photovoltaic semiconductors, and other fields. However, high-end molding equipment for high-temperature resistant composite materials has always faced strict technological blockades from Western countries. For many years, Jinggong Technology has been based on major national needs and has independently developed a series of high-temperature composite deposition equipment, continuously leading the development of new quality productivity.

This year, Jinggong Technology has conducted interdisciplinary research in materials, machinery, electrical engineering, software, and other fields. Based on new energy equipment technologies such as ingot casting furnaces and single crystal furnaces, it has innovated and upgraded its research and development of high-temperature composite deposition equipment such as carbon deposition equipment and silicon carbide deposition equipment, achieving significant breakthroughs.

Upgraded Development - Carbon Deposition Equipment

Carbon deposition equipment is used for the preparation of pyrolytic carbon coatings, interfacial layers, and carbon/carbon composites using hydrocarbon gases (natural gas, propane, propylene) as carbon sources.

Application scope: Carbon/carbon thermal field materials, carbon/carbon brake discs, carbon/carbon sheets, hot pressing molds, high-temperature heating elements/fasteners, solid rocket engine throat liners, etc.

Upgraded Development - Silicon Carbide Deposition Equipment

Silicon carbide deposition equipment is used for the preparation of silicon carbide coatings, interface layers, and carbon/silicon carbide composites using trichloromethylsilane (MTS) as the silicon carbide source.

Application scope: Satellite thermal stability components, attitude control engine nozzles, turbine blades, brake discs, etc.

Intelligent process control

The high-temperature composite deposition series equipment mainly consists of steel structural components, vacuum furnace body, heating and insulation system, vacuum and gas supply system, cooling system, power supply and control system, etc.

Intelligent control system interface

The team has independently developed an intelligent control system to achieve automatic control of various parameters throughout the entire sedimentation process. Using an industrial computer as the upper computer, responsible for setting up control processes, monitoring the entire process, displaying various feedback information (such as temperature, water flow rate, and current control stage), and issuing alarms in case of abnormal situations. In addition, the system can also collect and record changes in various parameters during the sedimentation process, and generate corresponding charts for analysis. The SNAP intelligent processor, as the lower computer unit, is the core part of the control system, responsible for executing precise control of temperature, vacuum degree, and gas pressure, and providing real-time feedback of these data to the upper computer.

Structural design optimization

In addition, the team utilized temperature and flow field models for the structural design of sedimentation equipment. By optimizing the temperature and flow fields inside the sedimentation furnace, they achieved uniform distribution of temperature and flow fields inside the furnace. Based on the principles of physical chemistry, combined with the evolution of the internal structure of porous preforms, mass and heat transfer kinetics, as well as the competitive relationship between homogeneous chemical reactions, gas-solid heterogeneous surface reactions, and precursor mass transfer efficiency, a multi physics coupled pyrolysis carbon and silicon carbide deposition model was constructed, including flow field, temperature field, pressure field, concentration field, and chemical reaction field.

Design of Temperature and Flow Fields for SiC Deposition Equipment

After optimizing the high-temperature composite deposition equipment and process using a deposition model, the uniformity of high-temperature composite deposition was improved by about 40%, and the deposition efficiency was increased by 70-100%.

Excellent technological advantages

Jinggong Technology's high-temperature composite deposition series equipment has excellent technical advantages:

Using multi zone independent temperature control technology to effectively ensure temperature uniformity;

Adopting an intelligent pressure regulation system, with minimal fluctuations in sedimentation pressure;

Based on a fully enclosed sedimentation chamber design, the sedimentation area has excellent sealing performance and strong anti pollution ability;

Adopting multi-channel sedimentation process gas path design, independent control can be achieved, the flow field is uniform and stable, and the sedimentation uniformity is excellent;

Fifthly, equipped with a multi-stage high-efficiency exhaust gas treatment system, environmentally friendly, and easy to clean up sedimentary by-products.

Developing new quality productivity and continuously leading new technologies! The upgraded research and development of this series of high-temperature composite deposition equipment has broken through the limitations of uneven deposition reaction, low efficiency, and poor quality of traditional deposition equipment. It has laid a solid foundation for the controllable, efficient, and high-quality preparation of high-temperature resistant composite materials such as C/C and C/SiC, and will bring important support to fields such as aviation, defense, military industry, new materials, photovoltaic semiconductors, etc!