Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Need ideas for sealing aluminum chamber at 350C

Need ideas for sealing aluminum chamber at 350C

Need ideas for sealing aluminum chamber at 350C

I'll try to keep the problem statement as short as possible.

Looking to seal aluminum chambers at 350C. This environment is too high for elastomer o-rings. Metal seals look nice but due to the high compression load, and the yield strength of aluminum at 350C, we're worried our chambers might yield.

The chambers have to be made out of 6061-T6. Due to the plasma and Flourine environment, we are limited by material choices.

Any ideas how I can solve this problem other than locally cooling the o-ring grooves? We were thinking maybe we can braze on a strip of a stronger material along the o-ring groove so that the metallic seals wont cause yielding but then we run into CTE mismatch issues.

RE: Need ideas for sealing aluminum chamber at 350C

Could try mica or vermiculite seals if the seal is static.... graphite is a no go with the flourine and plasma..

Flexitallic's Thermiculite 866 or 866LS *may* stand up to the plasma/flourine and shouldn't require as much force as the metal seals.

RE: Need ideas for sealing aluminum chamber at 350C

At 350C you can no longer have T6 aluminum. High temperature vacuum and pressure chambers are insulated on the inside so the pressure envelope is not exposed to high temperatures.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close