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- From: howard.smith@spacebbs.com (Howard Smith)
- Newsgroups: rec.autos.tech
- Subject: hydridepg2
- Message-ID: <3864.1558.uupcb@spacebbs.com>
- Date: 10 Oct 92 23:50:00 GMT
- Distribution: world
- Organization: SPACE BBS - Menlo Park, CA - 10 Lines + 4gB - 415-323-4193
- Reply-To: howard.smith@spacebbs.com (Howard Smith)
- Lines: 53
-
- AHA-SV Page 2
-
- This is best process we know at this time, and no guarantees are
- offered or implied if others want to use it.
-
- HYDRIDE MANUFACTURING PROCESS
-
- 1. Take 67.5 lbs. (30.7 kg) of 50 mesh powered titanium (Ti)
- 81 lbs. (36.8 kg) of 50 mesh powdered Iron (Fe)
- 1.5 lb. (0.7 kg) of 50 mesh powdered manganese ( Mn)
- 2. Put in a 5 gallon (23 L) aluminum drum.
- 3. Roll mix for 30 minutes at 10 RPM.
- 4. Pour into ceramic crucible.
- 5. Heat in RF induction oven under inert gas (argon) atmosphere
- to the melting point to the titanium (1668 degrees C) approx.
- 3,000 degrees F.
- 6. Hold for ten minutes and cool to solidification temperature.
- 7. Turn block over in the crucible and repeat step 5.
- 8. Turn block 90 degrees in crucible and repeat step 5.
-
- [NOTE: steps 7, 8 are done to insure thorough mixing of the
- melt.]
-
- 9. Cool to room temperature in the crucible.
- 10. Move the hydride block from the oven into a sealed container
- which is a large square box with a set of crush rollers
- internally contained within the box and sealed to maintain
- the inert (argon) atmosphere.
- 11. Crush the frangible hydride block and sieve the material
- through sieves contained within the box until it is reduced
- in size to all pass through the sieve. ie. pea sized gravel.
- 12. Purge a hydride storage tank with argon.
- 13. Connect the outlet from the crush box to the hydride storage
- tank taking care to purge the connection with argon to dis-
- place any air in the fittings.
- 14. Transfer the hydride into the hydride storage tank making
- sure to leave at least fifteen percent of the total volume of
- the tank empty for hydride expansion on hydriding.
- 15. Seal the hydride storage tank.
- 16. Open the one way valve outlet to let the argon escape and at
- the same time inlet pure hydrogen gas. Purge the hydride
- storage tank of all argon by flooding it with hydrogen gas.
- Close the hydrogen outlet valve.
- 17. Raise the temperature of the hydride storage tank to 200
- degrees F by a combination of internal and external heating.
- ie. insert the tank in a vat of near boiling water.
- 18. Increase the hydrogen gas pressure into the tank to 300 psi.
- to pack as much hydrogen gas as possible into the hydride
- material.
- (continued on page 3)
- ---
- . SLMR 2.1a . hAS ANYONE SEEN MY cAPSLOCK KEY?
-
-