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Evaluation of Glassy Phase in Sintered Silicon Nitride by Low‐Temperature Specific Heat Measurements
Author(s) -
Watari Koji,
Ishizaki Kozo,
Mori Katsunori
Publication year - 1991
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.1151-2916.1991.tb07328.x
Subject(s) - materials science , specific heat , debye model , phase (matter) , debye , silicon nitride , analytical chemistry (journal) , thermodynamics , silicon , composite material , condensed matter physics , metallurgy , chemistry , organic chemistry , physics
The specific heat of HIP sintered Si 3 N 4 with 3 mol% Y 2 O 3 and 3 mol% Al 2 O 3 additives was measured at different temperatures ranging from 2 to 10 K, in order to confirm the presence of a glassy phase in the sintered body. The grainboundary glassy phase in the sintered Si 3 N 4 was evaluated by specific heat measurements. The difference between the experimental value and the lattice specific heat calculated from the Debye theory confirmed the existence of a glassy phase in sintered Si 3 N 4 .