开云体育

I might add that if the chrome has been around awhile it may be necessary to hit it first with the HF to remove the native oxide that has formed. Don

Don

I would also like to know how to get rid of the Chromium layer. It sticks to regular pitch and rouge like ... pitch. I don't have any problem getting aluminum to stick to glass.? ? Guy Brandenburg,

Valdimir! How can you strip off the Chrome from the glass? In my experience, it comes off by polishing with pich or by grinding. I have not find any soultion which solves the Cr underlayer. Br. Attila

I have been messing up coatings a lot this week ( dialing in a new transformer ) so have been stripping them back off and analyzing the results. First off, I have noted that the coatings are massively

For Al and Ag I deposit 300 A Cr underlayer on glass at 20 A/s . Before I make oxygen ion beam substrates pre-cleaning during 2-3 min. Everything looks fine, adhesion is very good. Vladimir Chutko

I'm not sure about the best rate of deposition of Chrome by evaporation (have never done it) But chrome deposited by magnetron sputtering at a rate of about 30 nM a minute will bond with Soda lime

I need to do Cr coating which must adhere very well. But my evaporation rate may not be as high as I would like. Cr is always mentioned as holding on to glass well - better than most other metals.

Hi all! Have recently made my fist aluminum first surface coated mirror which came out perfect but the sticking isnt perfect but quite all right and getting better but i havent really cleaned it in

You could burn them dry if you keep the temperature on them under the tungsten boiling point at the desired vacuum, i always do like this and have never accidentally deposit tungsten if they happen to

Nice tip. I'm even more interested in how you made the mirror blank and from what found materials. ?3.5 eh? Building a camera? I've long had a desire to own a big "light bucket" telescope, but can't

Hi all, For your consideration I submit my reasons you don't want to burn tungsten elements dry. I was trying out a new 1000 amp transformer in my vacuum chamber electrical power supply setup and it

Gomez -- The roughing pump I have been evaluating is a Viot 2-stage, 1/3 hp, direct drive pump with a displacement of 2.75 cfm. They cost about $160 new on eBay. After some more research on the

Oh boy, not from memory. And I'm sure it differs between belt drive and direct-drive due to the difference in RPMs. I could swear there was something about it in my Cenco manual... but I looked just

Most likely.

Your pump is probably back-streaming but this is where my own knowledge runs out - surely they take that into account when stating ultimate pressures?

Hi Vladimir! Thank's it looks very nice! It try these things and I let you know. BR Attila

Recently i have an order to make a vacuum furnace for composite heat treatments of composites. how much the pressure is in the vacuum chamber of furnace as respect the hot zone is made by graphite...?

Hi Attila, Please see attached paper - I done it a couple years ago for students. BR Vladimir

Hi Vladimir! Well the graphite powder is no problem, I can make it! But how can I shield the glow discharge cathode? How big should be the area of the cathode? Best regards Attila