×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Joselito

Joselito

Joselito

(OP)
I have an interesting problem.  I am doing work with boral, which is a sandwich material composed of a sintered layer of aluminum and Boron Carbide with a thin layer of aluminum attached on the top and bottom surfaces by hot rolling.  

The test coupons being used are allowed to soak in baths of demineralized water at moderately high temperatures and pressures (150 F, 18 psi-g) for aproximately 140 hours.  A water retention weight gain of aproximately 0.40 % is observed before the coupons are placed within a high temperature vacuum vessel (550 F, 0.09 psi-a).

As the coupons are heated the absorbed water vaporizes and tries to escape.  In doing so, blisters are created in the aluminum outer coating in a small number of trial coupons but not in others.  

I am trying to determine what properties of this material is affecting blister formation.  Does anyone think that the demineralized water is corroding the material once it has been absorbed and is blocking itself in?  

Thanks for any help.   

RE: Joselito

I had the same problem with powdered aluminum alloy sandwiched between two layers of wrought aluminum. Water adsorbed on the great surface area desorbs on heating.
You have to find a way to let this get out.

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



News


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