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 several 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 uses a space-gas-phase chemical reaction to deposit a solid thin coating on the surface a substrate. 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 (typically 9001200). 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. The preparation process will produce harmful waste gases and waste liquids, which can easily cause industrial pollution. This is contrary 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 desired coatings on the substrate surface. This includes evaporation coat, sputtering coat and ion-coating technology. PVD is currently used more often for the preparation of ceramic coatings.
A PVD film’s brittleness makes it easy to peel and crack. It is also a linear process, with poor adhesion, and coating properties. 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 principle is to drive hydrolysis balance movement of the metallic compound by replacing the ligand between the ions so that metal oxide or hydroxide can be deposited on substrates to form thin film coatings. The method works under low-temperature/room temperature conditions. No heat treatment is needed, nor is expensive processing equipment.
This method has a few disadvantages. It is essentially a liquid phase reaction and therefore the concentration before and after is inconsistent.
4. Thermal spraying
The process involves heating a linear material or powder to a molten, semi-melted, state with a heat-source such as a flame 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 surface properties of the material. Plasma spraying, flame spraying and arc-spraying techniques are all part of the method.
5. In-situ Synthesis
In-situ composite technology is used to create the second phase of the material. It is created in situ and without pollution. The second phase is also evenly distributed. The application of in-situ technology to metal and ceramic-based material has increased with the development.
6. Other synthetic methods
Other synthetic methods include liquid EDM surface enhancement, sol-gel, melting and cast methods, high-density beam coatings, self-propagating heat propagation, and 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 trusted global chemical supplier and manufacturer of high-quality Nanomaterials with over 12 year’s experience, is a trusted source for super-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 uses a space-gas-phase chemical reaction to deposit a solid thin coating on the surface a substrate. 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 (typically 9001200). 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. The preparation process will produce harmful waste gases and waste liquids, which can easily cause industrial pollution. This is contrary 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 desired coatings on the substrate surface. This includes evaporation coat, sputtering coat and ion-coating technology. PVD is currently used more often for the preparation of ceramic coatings.
A PVD film’s brittleness makes it easy to peel and crack. It is also a linear process, with poor adhesion, and coating properties. 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 principle is to drive hydrolysis balance movement of the metallic compound by replacing the ligand between the ions so that metal oxide or hydroxide can be deposited on substrates to form thin film coatings. The method works under low-temperature/room temperature conditions. No heat treatment is needed, nor is expensive processing equipment.
This method has a few disadvantages. It is essentially a liquid phase reaction and therefore the concentration before and after is inconsistent.
4. Thermal spraying
The process involves heating a linear material or powder to a molten, semi-melted, state with a heat-source such as a flame 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 surface properties of the material. Plasma spraying, flame spraying and arc-spraying techniques are all part of the method.
5. In-situ Synthesis
In-situ composite technology is used to create the second phase of the material. It is created in situ and without pollution. The second phase is also evenly distributed. The application of in-situ technology to metal and ceramic-based material has increased with the development.
6. Other synthetic methods
Other synthetic methods include liquid EDM surface enhancement, sol-gel, melting and cast methods, high-density beam coatings, self-propagating heat propagation, and 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 trusted global chemical supplier and manufacturer of high-quality Nanomaterials with over 12 year’s experience, is a trusted source for super-high quality chemicals. Titanium Carbide TiC is produced in high purity with fine particles by our company. Contact us if you need to.