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The difference between titanium carbide and titanium nitride coating

wallpapers News 2020-05-12
Titanium plating is generally used to improve the wear resistance of the surface of the object. For example, the taps and drills used in high-speed machining centers can be coated with titanium to improve the wear resistance of the tool. Wear resistance.
 
There is also decorative titanium plating, which is not as good as a gold ring that can be bought on the street for a few dollars. It is generally titanium-plated. The main color is golden, which is good-looking and prevents surface oxidation and rust.
 
1. What are the commonly used processes for titanium plating? The titanium plating process includes the vacuum coating and spraying process.
 
Vacuum coating includes the magnetron sputtering method, arc ion plating method, etc. If nitrogen is introduced during the coating process, titanium nitride can be formed, and the coating color is golden yellow, otherwise white. This method has a thin coating, generally around 15 microns, and the coating is bright and does not require subsequent processing.
 
The spraying method is cold spraying. The coating is very thick and can reach the order of millimeters, and the rough surface requires subsequent processing.
 
2. The difference between titanium carbide and titanium nitride coatings:
 
Different colors: titanium carbide (black) and titanium nitride (gold).
 
Different hardness: titanium carbide has higher hardness than titanium nitride.
 
However, the high-temperature oxidation resistance of titanium carbide is not as excellent as titanium nitride, so a titanium carbonitride film is derived. Titanium aluminum nitride, chromium nitride film, etc. have also been popular in recent years.
 
Titanium carbide is more complicated than titanium nitride in technology, and the control range is narrower.
 
The above two plating processes are very mature. They are divided into decorative plating and tool plating. The decorative plating is generally very thin and does not exceed 1 micron. The tool plating requires a thicker 3-5 microns.
 
3. Reasons for the roughness of the film: such as the surface finish of the substrate is not high, the surface ion bombardment before the coating is too long, etc.

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