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Hot Isostatic Processing of Shocked Si 3 N 4 Powder
Author(s) -
Sōmiya Shigeyuki,
Yoshimura Masahiro,
Fujiwara Shutaro,
Kondo KenIchi,
Sawaoka Akira,
Haitori Takeo,
Mohri JunIchi,
Araki Masatada
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb19755.x
Subject(s) - hot isostatic pressing , materials science , metallurgy , shock (circulatory) , silica glass , composite material , mineralogy , sintering , geology , medicine
To enhance the sinter ability of Si 3 N 4 , powders mixed with 0, 2, and 5 wt% Y 2 O 3 were explosively shock‐treated. Compacts of these powders were encapsulated in 96% silica glass containers and isostatically hot‐pressed. The shocked Si 3 N 4 with 5 wt% Y 2 O 3 was pressed to a density of 3.09 g/cm 3 (95.4% of theoretical) at 1400°C under 430 MPa for 3 h, whereas the unshocked material attained only 82.4% of theoretical density under the same hot isostatic pressing conditions.