Method of producing large objects from rapidly quenched non-equi

Details Method of producing large objects from rapidly quenched non-equi Method of producing large objects from rapidly quenched non-equi

1980-07-09

1982-04-20

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 25, 264111, 264120, B06B 300

Patent

active

043258956

ABSTRACT:
A method of producing large objects from rapidly quenched non-equilibrium powders in which the powder is first slowly precompacted to a predetermined density without causing any substantial temperature rise. The powder is then rapidly compacted by a shock wave having a short rise time. In this way thin surface regions on the particles are rapidly brought to melting to cause interwelding of the particles. These thin surface regions are then rapidly quenched by conduction of heat to the interior of the particles. Because of the very rapid heating and quenching, in the order of a few microseconds, degradation of the material is avoided.

REFERENCES:
patent: 3662052 (1972-05-01), Nowak et al.
patent: 3717427 (1973-02-01), Bodine
patent: 4000231 (1976-12-01), Peterson

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