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The titanium carbide-based Cermet is a heterogeneous material that consists of metal or TiC ceramic phases. It combines high strength, high wear resistance, high temperature resistance as well as chemical stability and chemical resistance of ceramics. 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 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 is not without its disadvantages. The processing temperature (generally, 9001200) is high. 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)

The desired coating can be applied to the substrate using physical processes, such as thermal or sputtering evaporation. This includes sputtering and ion technology, 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. A linear process, with poor adhesion, is also used. The vacuum chamber is more difficult to design and build because the workpiece has to swing or rotate during processing. 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 a thin layer coating formed from the metal hydroxide or oxide. The method works under low-temperature/room-temperature conditions. No heat treatment is needed, nor is expensive processing equipment.

This method is not very stable because of its many influences on the liquid phase and it’s inconsistency of concentration before and after reaction.

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 coating, to restore or strengthen the surface properties of the material and to reduce the size of parts due wear, corrosion or manufacturing tolerances. Plasma spraying, flame spraying, or 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 materials has increased with the development.

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 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.

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