Method of fabricating hot pressed silicon nitride billets

Details Method of fabricating hot pressed silicon nitride billets Method of fabricating hot pressed silicon nitride billets

1986-04-03

1986-12-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264325, 264332, C04B 3558

Patent

active

046327932

ABSTRACT:
A method is disclosed of making a plurality of dimensionally accurate hot pressed ceramic bodies. A plurality of Si.sub.3 N.sub.4 plates having a thickness to width ratio of 1:3 to 1:40 are stacked in a hot pressing assembly (40-41-42-43). The plates are arranged in groups of progressively decreasing number so that (a) for a plate group (10-11-12-13-14) residing in a zone of compression (15) that will experience the least movement along the pressing direction the stacked number of plates is greatest within such group, and (b) for a plate group residing in a zone of compression (22) that will experience the most movement along the pressure direction the stacked number of plates (21) within such group is the lowest, each group being separated from adjacent groups by an inert rigid spacer.

REFERENCES:
patent: 3264388 (1966-08-01), Rouch
patent: 3535132 (1970-10-01), Lunde
patent: 3632708 (1972-01-01), Mandorf et al.
patent: 4096120 (1978-06-01), Grunke
patent: 4172107 (1979-10-01), Nakamura et al.
patent: 4315876 (1982-02-01), Baker et al.
patent: 4477402 (1984-10-01), Ezis
patent: 4489032 (1984-12-01), Ezis et al.
patent: 4508671 (1982-04-01), Ezis
Alper, "High Temperature Oxides," Refractory-Materials, vol. 5, III, 1970, pp. 184-189.

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