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Title: Metallographic preparation of pressed and sintered powder-metallurgy material (tungsten, niobium, lead, and copper)

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 metals of tungsten and niobium, 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.

Inventors:
Publication Date:
OSTI Identifier:
6326640
Assignee:
Dept. of the Army, Washington, DC GRA; EDB-87-124170
Resource Type:
Patent
Resource Relation:
Other Information: This Government-owned invention available for U.S. licensing and, possibly, for foreign licensing. Copy of application available NTIS
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER; POWDER METALLURGY; LEAD; NIOBIUM; TUNGSTEN; ENCAPSULATION; GRINDING; MATERIALS; METALLOGRAPHY; METALS; POLISHING; POWDERS; REFRACTORY METALS; SAMPLING; SINTERING; ALLOYS; COMMINUTION; ELEMENTS; FABRICATION; MACHINING; METALLURGY; SURFACE FINISHING; TRANSITION ELEMENTS; 360101* - Metals & Alloys- Preparation & Fabrication

Citation Formats

Goodwin, E.L. Metallographic preparation of pressed and sintered powder-metallurgy material (tungsten, niobium, lead, and copper). United States: N. p., 1987. Web.
Goodwin, E.L. Metallographic preparation of pressed and sintered powder-metallurgy material (tungsten, niobium, lead, and copper). United States.
Goodwin, E.L. Sat . "Metallographic preparation of pressed and sintered powder-metallurgy material (tungsten, niobium, lead, and copper)". United States.
@article{osti_6326640,
title = {Metallographic preparation of pressed and sintered powder-metallurgy material (tungsten, niobium, lead, and copper)},
author = {Goodwin, E.L.},
abstractNote = {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 metals of tungsten and niobium, 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {3}
}