Metallographic preparation of pressed and sintered powder metall

Details Metallographic preparation of pressed and sintered powder metall Metallographic preparation of pressed and sintered powder metall

1987-03-23

1987-11-03

Terapane, John F.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

B24B 100

Patent

active

H00003611

ABSTRACT:
A metallographic preparation technique employs a grinding and polishing in our stages, and with multiple steps of each stage, to produce a flat, scratch-free representative sample of a pressed and sintered powder metallurgy material comprised of tungsten, lead, copper, and columbium.
The constituents, both hard and soft and in a predetermined weight percent range, are the hard constituents of tungsten and columbium and the soft constituents of lead and copper are finished to yield a sample suitable for microscopic and photomicrograph evaluations since the flatness of the sample and scratch-free surface permits viewing of the shape and size of the individual constituents. The standard prior art metallographic preparation procedure did not produce acceptable results because of the polishing procedure which rounded the refractory constituents and left them in relief. The soft constituents were not scratch free.

REFERENCES:
AB Metal Digest (Buehler Ltd) 1973.

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