Turning

Subject:
Re: thanks for a great explanation

John K Jordan
Yes, nice writeup!

When I ran a small metallography shop in the early '70s I cast thin plate sections in epoxy (highly enriched uranium clad in aluminum) then polished them for etching and microscope examination. Even tiny bubbles caused me grief when polishing since they could hold grit even the ultrasonic cleaner sometimes didn't get out. I mostly used vacuum for casting but with the right chamber I got great results by first holding a vacuum until the sample quit bubbling then pressurizing until the epoxy set.

JKJ

© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081