It is a method that uses a space-phase chemical process to deposit a thick thin film coating onto the substrate. Since the whole reaction is based upon thermodynamics, CVD films have the benefits of high adhesion and coatingability as well as dense film layers and strong film-base bonding. These properties can allow for the creation of TiC, such TiCN, TiBN, TiBN, or other single- and multi-layer composite coats.
However, this process has one drawback: The processing temperature can be quite high at 900 to 1200 degrees Celsius. This high heat causes the steel matrix of to become softened. The steel matrix must then be vacuum quenched once more has been done. It is more difficult and can also be easily deformed. This results in lower bending strengths of the matrix materials. There will be a reduction in the amount of useful waste gas or liquid produced by this process. It is also easy to pollute the industrial environment, contrary to what the country advocates today.
2. Physical vapor deposition (PVD)
The substrate’s surface is coated using this technique. It uses physical processes, such as thermal, sputtering and glow discharge. These include sputtering technology, evaporation coating and ion-coating technology. These are the most commonly used PVD techniques for ceramic coating preparation.
Because of its fragility, PVD films often have residual compressive stress. This film is not suitable for linear processing. It has low adhesion and poor coating properties. The vacuum chamber is more difficult because the workpiece must be rotated and swung during processing. Probleme such as an ineffective coating.
3. Liquid deposition
This is a chemical film-forming process that uses a wet chemical method. This method works on the principle of hydrolysis equilibrium movement. It does this by ligand replacing the ions in the solution. Once the solution has dissolved, the metal compounds are deposited onto the substrate. The operation of this method is very simple and doesn’t require heat treatment.
However, this isn’t the best method because the reaction is in an aqueous solution. This means that the solution concentrations are inconsistent between before and after deposition. Additionally, there are numerous influencing factors which can cause the reaction to occur in liquid phase.
It involves heating certain powdered or linear materials to molten, semi-melted states using heat sources such as flame, plasma or arc. The droplets are then sprayed onto the substrate to create a protective coating. This can improve or renew the material’s surface properties, serve a protective function, and reduce wear due to corrosion or changes in processing tolerances. It can also be done using flame spraying and arc spraying.
5. In-situ Synthesis
The principle of in-situ synthetic is that the second or reinforcing phases in the material are generated during formation. It is possible to avoid problems associated with traditional powder metalurgists and smelting processes by generating the reinforcement phase in situ. The application of this in-situ technology to both metal- and ceramic-based materials has increased.
6. You can also use other synthetic methods
These preparations include in-situ and indirect synthesis processes as well as melting and casting, powder metallurgy, mechanical alloying, and thermal spraying. Actual industrial production situations will dictate the choice of preparation methods for the carbonized-based Cermet composite material.
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