Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Patent
1992-10-28
1993-11-30
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
419 57, 419 12, 419 13, 75751, B22F 916
Patent
active
052662632
ABSTRACT:
The invention relates to the reprocessing of used evaporation boats. This is done by a method which comprises comminuting used, aluminum-contaminated evaporation boats and roasting them in a nitrogen-containing atmosphere.
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Data base abstract for EP-A-0429345.
Data base abstract for FR-A-2,170,839.
Data base abstract for EP-A-0494129.
Hunold Klaus
Matje Peter
Chi Anthony R.
Elektroschmelzwerk Kempten GmbH
Walsh Donald P.
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