The preparation process of titanium carbide-based cermet

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The titanium carbide-based Cermet is a heterogeneous material that is composed of metal phase or TiC ceramic. 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 many different 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 the surface a substrate 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.

The processing temperature of this method (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)

This method utilizes physical processes, such as thermal, sputtering and glow discharge discharge, to deposit the desired layer on the substrate surface. This includes sputtering and ion technology, as well as evaporation. 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. During processing, the workpiece is required to swing or rotate. 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 concentration of solution before and after reaction is inconsistant. Also, there are several factors affecting the liquid phase reaction and the industrial stability of the method is not very high.

4. Thermal Spraying

This technique involves heating linear materials or powders into a molten, semi-melted, state by using heat sources such as a flame or arc. 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 and to reduce the size of parts that have been reduced by wear, corrosion, or processing tolerances. 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, avoiding the problems associated with traditional powder metallurgy or smelting. The application of in-situ technology has expanded to include metal-based and cermet-based materials.

6. Other synthetic methods

Other synthetic methods include liquid EDM surface enhancement, sol-gel, melting and cast methods, mechanical alloying, self propagating high-temperature syntheses, thermal spraying, high-density energie beam coating, and others. In industrial production, the choice of preparation method for carbonized-based cermet can be made according to the conditions and needs of each application.

(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacturer has over 12 years experience in providing super-high-quality chemicals and nanomaterials. Titanium Carbide TiC is produced in high purity with fine particles by our company. Contact us if you need to.