finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 4241

Wear Coatings for Aluminum Bearing Surface


(2000)

Hi!

I'm trying to solve a wear problem that involves a plastic substrate with small alumina particles embedded in it running over an aluminum surface. The substrate only touches the aluminum surface intermittently at the edges of the plastic, and this is where the wear occurs. I've tried anodizing the aluminum (~.001" thick), but that seems to wear fairly quickly. I'm considering trying a much harder coating, such as TiN or some sort of PVD diamond, but I am concerned that because these coatings are so much thinner than the anodize I won't gain much net life. Does anyone have an idea if, and if so how much, increase in wear life I might expect from one of these harder, thinner coatings? Or have any ideas on other coatings that I might try?

Thanks so much!

Jeannie Yoo
- Minneapolis, Minnesota


(2000)

The standard substrate temperature for TiN and most other PVD coatings is 450 C -- far too high to coat aluminum. While we are depositing Cr2N on aluminum at 120 C, and have deposited TiN at 150 C, I would suggest you look at either electroless nickel plating or thermal spray.

jim treglio portrait
Jim Treglio
PVD Consultant - San Diego, California



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.