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The titanium carbide-based Cermet is a heterogeneous material that is composed of a metal or alloy phase TiC. Ceramics have high wear resistance, high strength and hardness. They also resist high temperatures, are resistant to oxidation, and possess chemical stability. For titanium carbide-based Cermets, there are a number of synthetic preparation processes. Each has advantages and drawbacks. In the actual production, processes that are suitable for different applications and price factors can be chosen. 1. Chemical Vapor Deposition (CVD)
This method is a technology that deposits a thick, solid coating on a surface using a gas-phase reaction. Due to the fact that the entire reaction in this method is based upon thermodynamics the CVD film offers good adhesion as well as coatingability. It also has a dense film layer and a high film-base adhesive strength.
This method has a disadvantage in that the processing temperatures are relatively high (generally between 9001200 degrees). The high temperatures cause the matrix of steel to soften. Vacuum quenching is required after the processing. The workpiece is easily deformed and the process is complex. This results in a decrease in the bending resistance of the matrix. Decrease, and harmful waste gases and waste liquids will be produced during preparation, which can easily cause industrial pollution. This is in contradiction to the green industry that the country advocates today.
2. Physical vapor deposition (PVD)
This method utilizes physical processes, such as thermal, sputtering and glow discharge discharge, to deposit the desired layer on the surface of substrate. This includes sputtering and ion-coating technologies, as well as evaporation. The two latter PVD techniques are more widely used today for the preparation of ceramic coatings.
A PVD film’s brittleness makes it easy to peel and crack. The linear process has poor adhesion, and the coating properties are also bad. The workpiece has to be rotated or swung during processing. This increases the difficulty in designing the vacuum chamber. There are problems such as an ineffective coating.
3. Liquid deposition
This is a chemical wet film-forming method. The basic principle is that by replacing the ligand between the ions of the solution, the hydrolysis balance movement of the metallic compound is driven. This results in the deposition on the substrate of a thin layer coating. The method works under low-temperature/room temperature conditions. No heat treatment is needed, nor is expensive processing equipment.
The main disadvantage is that the liquid phase reaction is highly unstable and has many influences.
4. Thermal Spraying
This technique involves heating linear materials or powders into a molten, semi-molten, or liquid state, using heat sources such as arcs, flames, or plasma. High-speed droplets are formed and sprayed on the substrate, creating a coating. They can also be used as a protective layer, to restore or strengthen the material’s surface performance, or to regenerate it. Plasma spraying, flame spraying and arc-spraying techniques are all part of the method.
5. In-situ Synthesis
The second phase of reinforcement is synthesized without pollution and is distributed evenly, which is an advantage over traditional processes such as powder metallurgy or smelting. The application of in-situ technology has expanded to include metal-based as well as ceramic-based material.
6. Other synthetic methods
Other synthetic methods include liquid EDM surface enhancement, sol-gel, high-density energie beam coating, self-propagating heat propagation, melting and cast methods, powder metal methods, mechanical alloying, thermal spraying. In industrial production, the choice of the preparation process for carbonized-based cermet can be made according to the conditions and requirements of each application.
(aka. Technology Co. Ltd., a global leader in chemical materials and nanomaterials with over 12 year’s experience as a supplier of high-quality chemicals. Titanium Carbide TiC is produced in high purity with fine particles by our company. Contact us if you need to.
This method is a technology that deposits a thick, solid coating on a surface using a gas-phase reaction. Due to the fact that the entire reaction in this method is based upon thermodynamics the CVD film offers good adhesion as well as coatingability. It also has a dense film layer and a high film-base adhesive strength.
This method has a disadvantage in that the processing temperatures are relatively high (generally between 9001200 degrees). The high temperatures cause the matrix of steel to soften. Vacuum quenching is required after the processing. The workpiece is easily deformed and the process is complex. This results in a decrease in the bending resistance of the matrix. Decrease, and harmful waste gases and waste liquids will be produced during preparation, which can easily cause industrial pollution. This is in contradiction to the green industry that the country advocates today.
2. Physical vapor deposition (PVD)
This method utilizes physical processes, such as thermal, sputtering and glow discharge discharge, to deposit the desired layer on the surface of substrate. This includes sputtering and ion-coating technologies, as well as evaporation. The two latter PVD techniques are more widely used today for the preparation of ceramic coatings.
A PVD film’s brittleness makes it easy to peel and crack. The linear process has poor adhesion, and the coating properties are also bad. The workpiece has to be rotated or swung during processing. This increases the difficulty in designing the vacuum chamber. There are problems such as an ineffective coating.
3. Liquid deposition
This is a chemical wet film-forming method. The basic principle is that by replacing the ligand between the ions of the solution, the hydrolysis balance movement of the metallic compound is driven. This results in the deposition on the substrate of a thin layer coating. The method works under low-temperature/room temperature conditions. No heat treatment is needed, nor is expensive processing equipment.
The main disadvantage is that the liquid phase reaction is highly unstable and has many influences.
4. Thermal Spraying
This technique involves heating linear materials or powders into a molten, semi-molten, or liquid state, using heat sources such as arcs, flames, or plasma. High-speed droplets are formed and sprayed on the substrate, creating a coating. They can also be used as a protective layer, to restore or strengthen the material’s surface performance, or to regenerate it. Plasma spraying, flame spraying and arc-spraying techniques are all part of the method.
5. In-situ Synthesis
The second phase of reinforcement is synthesized without pollution and is distributed evenly, which is an advantage over traditional processes such as powder metallurgy or smelting. The application of in-situ technology has expanded to include metal-based as well as ceramic-based material.
6. Other synthetic methods
Other synthetic methods include liquid EDM surface enhancement, sol-gel, high-density energie beam coating, self-propagating heat propagation, melting and cast methods, powder metal methods, mechanical alloying, thermal spraying. In industrial production, the choice of the preparation process for carbonized-based cermet can be made according to the conditions and requirements of each application.
(aka. Technology Co. Ltd., a global leader in chemical materials and nanomaterials with over 12 year’s experience as a supplier of high-quality chemicals. Titanium Carbide TiC is produced in high purity with fine particles by our company. Contact us if you need to.