new applications pvd technology

[Stefano_GS]

Good evening,
I write because I would like to open a discussion table on possible developments in pvd technology in unexplored areas.
For example, the first experiences are being made, with very positive results, in the coating of matrices for extrusion of aluminum profiles.
do you have experiences about it or imagine any potential application?

I'll explain right away: My contribution is partially affected by the fact that I work in a company that also proposes pvd coating. the discussion though I would like if it was a technical comparison table

 

[cacciatorino]

We could start by explaining what the pvd is, I had to go to google. ;-)

 

[brn]

I had approached the speech to have an anti-adhesion (type teflonatura) on stainless steel rollers at 500°c.
very niche application

 

[Stefano_GS]

@cacciatorino you are right remedy right away, hearing them speak everyday I mistakenly took for granted what it meant.
to simplify:
pvd is the acronym of physical vapour deposition, or in Italian vapour phase physical deposition.
This is the deposition of a thin film (0,001-0,010mm) of high hardness (2300-3500 microhv) and reduced friction coefficient (0,3-0,6 towards steel).
the generation of the pvd coating occurs through the evaporation of metals that compose the coating layer that we will get.
the transport from the sources, called targets, to the details to be coated happens through a plasma, that is a gas strongly ionized to very low pressure.
deposition is favoured by the presence of an electric field.
the materials that can be laid are different:
♪
Tialn
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not all basic materials can be covered, they must be electrical conductors and have a tempting temperature higher than that of the coating (vary according to the coating but around 450-550°)

 

[rinato]

and what variation on the theme is the pvd I read to do on the cassses etc. of orolgi, even of brand? I think I've seen it mostly black, but also gold, I think.

I had teased my pvd seller if at the bottom of the drawer they had had that instead of reducing friction, they had increased it (I don't even remember what application): Of course, but it doesn't exist.

 

[Stefano_GS]

the above applies to the pvd in the mechanical field, there are also other applications such as lens coating of the glasses (anti-scratch, anti-reflective) and decorative.
pvd on watches has decorative effect and also scratch-resistant (as side effect of decorative property).
increase friction to what value? some types come to friction coeff 0.6 although normally then they are treated to reduce this value

 

[rinato]

As I said, I don't even remember what I wanted to do with it.... let's figure out if I have an idea of the coeficient. . It must have been an academic debate.

 

[bip]

I imagine you are mainly oriented to metal deposits; years ago I had done some tests to deposit graphite on glass surfaces (to make them weakly conductive, while maintaining transparency).
requiring a vacuum sufficiently pushed, it was a rather long processing, and in the end we had considered results almost analogous "sporking" the glass with a pencil. .

new applications? I think the applications are basically those, anti-friction/anti-wear coatings, maybe of "innovative" there could be used instead of other surface treatments, which I know, for example as an alternative to nitriding for couplings type screw/madrevite maneuver, where tolerances are rather narrow

 

[Stefano_GS]

I meant exactly that: ascertained that it is anti-friction/wear coating and that their application is still niche which components could be beneficial to you?
for now we have:
Extrusion matrices
screw/magnet
pulleys for dense belts?

 

[Vittorio]

in my industry, automotive aluminum die casting molds. we use a similar coating.. is called alcrona balinit . an extremely wear-resistant coating, with excellent levels of hot hardness and stability in thermal shocks

 

[brn]

I meant exactly that: ascertained that it is anti-friction/wear coating and that their application is still niche which components could be beneficial to you?
for now we have:
Extrusion matrices
screw/magnet
pulleys for dense belts?

antifriction and surface hardening on austenitic stainless steel since unlike other materials there is no treatments. Moreover the high cost of treatment is justified by the high cost of the application

 

[scalva]

we also make cutlery

https://sambonet.it/it/prodotti/posate/per-stile/stile-vintage/servizio-24-pz-monoblocco/62712p81