RE: CM1 Plasma coating for MAN
Hi plzc126330,
It is difficult to find a reason without images (cross sections). But something can be understood:
1) 5, 10 and 20 kg after MAN specification (Brinell test of interfaces) mean very different loads. 5 kg need really all layers without cracks endure, 10 kg is a limit, the "bad" and "good" layers separating. 20 kg survive only the best layers without cracks.
2) When vertical cracks produced in the layer after the test, it suggests to high tensile stresses in the layer.
3) If the layer still exhibits no cracks after the test, but detached from the substrate, the adhesion is too low.
Give some more info and pictures, then we can talk about causes and necessary measures.
Regards
Vadim
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