The source material is a ceramic glaze pattern,After cleaning and drying at 500 degrees for 8 hours.
They are fed into a TiN PVD furnace, the target is 20 plasma sources!
The plating furnace in the process of coarse suction is heated to 120 degrees, rotating the target material evenly 2 rpm
When the vacuum reaches 1.2x10-2 Pa, start coating:
1. First, pure Agron gas is introduced, flow 800-1000sccm, time 4 minutes, plating chamber pressure 6.0x10 + 0 Pa, Turn on 20 TiN plasma sources.rotating the target material evenly 2 rpm
2. Then turn off Agron gas, fill up with high purity Nitor gas, Flow 1100-1200sccm, maintain pressure 2.5x10-1, rotating the target material evenly 2 rpm,Turn on 20 Tin Plasma sources, coating time is 10 minutes. Vacuum chamber temperature is 145 degrees. Finish coating process.
The phenomenon of ceramic surface spots and coatings do not adhere to some textures! We have tried many times and tried to clean the surface, but still can't fix it
But if we dry the vacuum chamber at 70-80 degrees and finish the plating process at 125 degrees, that phenomenon does not happen but the pale color is not satisfactory!This is a system that uses an oil diffuser pump.
Attached picture is surface defect.
So, your base pressure is 10-2Pa and your second coating step is 10-1Pa? Then you essentially sputter with almost 10% oxygen (molecular, in CO or in water) in your chamber, it doesn't really sound surprising that the material has impurities.
Hi Raymon Ics.
TiN film has very high internal compressive stresses. With insufficient adhesive strength, such film cannot adhere to rough surface on some ceramic materials. You need to complete your coating without N nitrogen. Perhaps out of 20 your cathodes, 10 cathodes will be from Titanium Ti and r 10 cathodes will be installed from Cu copper. For example. Then, with simultaneous inclusion of all 20 cathodes using, lowest possible pressure of Ar argon, you will get coating consisting of TiCu intermetallide. But you will choose shade of golden color you need based on number of copper cathodes included in Cu. So you greatly reduce compressive stresses in your coating. The second option is with N nitrogen and Ti cathodes plus Cu copper cathodes. Choose experimentally.
I hope this information was useful to your.
Konsta.
Thank you! We have been plating porcelain for many years, the porcelain surface has been glazed smooth and flat. New surface peeling phenomenon occurs.
Do we suspect too much N2 gas coming out or too high temperature at the end of plating chamber?
Plating test at N2=900sccm flow, heating the plating chamber 90 degrees when raw suction and when bombarding the Tin source when the temperature of the plating chamber increases to 125 degrees to finish plating, the color results are unsatisfactory.
Defective coating in the form of iridescent crystals with fish scales can be removed by hand with low grip
Hi Raymon Ics.
If coating were to flake off all over surface of your porcelain then there is something wrong with your coating technique. But if coating peeled off only in some places on new porcelain, then this is local defect in preparation for surface coating or surface local defect of new porcelain itself. Make coating on porcelain on which coating sits good. Proven old sample. If coating does not fall off, then it's problem quality of your new porcelain. Well, logic of definition problem is this.
Hope this information was useful to you.
Konsta.
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