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Vacuum compatible/nonmagnetic/non electrically conductive materials

2003

I am looking for some vacuum compatible materials that will be subjected to the following conditions

1) T=170 F
2) P=10^-6 Torr
3) 2 Tesla magnetic field
4) materials must be low outgassing

I started with aluminum since it is vacuum compatible and nonmagnetic. However, the magnetic field will cause inductance in the electrically conductive aluminum which will interfere with the 2 Tesla field. Then I thought of anodizing the aluminum to make it nonconductive. However, the anodizing will cause high outgassing in the chamber. I believe nylon will become too brittle at this temperature. I am hoping for some suggestions.

Frank Arnolds
- Culver City, California

How about Teflon. UHMW polyethylene plastic might work, but will soften at that temp.

James Watts
- Navarre, Florida
2003

A very thin layer of highly resistive material such as SST or chrome and/or just an epoxy spray coat might work. Epoxy could also seal the anodized layer.

Mandar Sunthankar
- Fort Collins, Colorado
2003

CPVC, chlorinated PVC (rated to 208 deg F) should perform well in this application and is far more cost effective than Teflon.

Jeremy Gray
- Melbourne, Australia
2003

Ultem 2200, a glass filled polyetherimide (rated to 400 degrees F) should work. The costs will be a bit hi.

Eddie De Anda
- San Diego, California
2004

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