Metallographic Preparation of Pressed and Sintered Powder Metallurgy Material (Tungsten, Columbiun, Lead and Copper).

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Abstract:

An object of this invention is to provide a metallographic preparation procedure for obtaining a flat and scratch free surface of a representative sample of a pressed and sintered powder metallurgy material. A further object of this invention is to provide a metallographic preparation procedure for obtaining a flat and scratch free surface of a representative sample of a pressed and sintered powder metallurgy material comprised of a composite of the refractory metals tungsten and columbium and the soft metals lead and copper. The representative samples of Table I contain hard and soft constituents. The hard constituents are refractory meatls of tungsten and columbium, and the soft constituents are soft metals of copper and lead. All samples were selected and cut from parent material and encapsulated in epoxy resin prior to polishing, Stage A. The encapsulation enabled the sample to be held during grinding and polishing for the metallographic preparation technique disclosed by the additional Stages B-E and steps outlined below.

Author(s):
Goodwin, Eugene L.
Author Organization(s):
DEPARTMENT OF THE ARMY WASHINGTON DC
Descriptive Note:
Patent Application,
Pagination:
0009

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Availability: T His Government-owned Invention Available For U.s. Licensing And, Possibly, For Foreign Licensing. Copy Of Application Available Ntis.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
PAT-APPL-029 127
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*PATENT APPLICATIONS, *METALLOGRAPHY, *GRINDING, *POWDER ALLOYS, *POLISHING, COPPER, ENCAPSULATION, EPOXY RESINS, MATERIALS, METALS, NIOBIUM, POWDER METALLURGY, POWDERS, PREPARATION, REFRACTORY METALS, SAMPLING, SINTERING, TABLES(DATA), TUNGSTEN, LEAD(METAL), SYNTHESIS(CHEMISTRY), SURFACE ROUGHNESS
Field(s)/Group(s):
Fabrication Metallurgy
Keyword(s):
Columbium
Report Date:
1987 Mar 28