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Densification of Silicon Nitride: Effect of Chlorine Impurities
Author(s) -
Clarke D. R.
Publication year - 1982
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.1151-2916.1982.tb10372.x
Subject(s) - chlorine , impurity , materials science , hot pressing , silicon nitride , silicon , phase (matter) , nitride , metallurgy , chemical engineering , inorganic chemistry , composite material , chemistry , organic chemistry , layer (electronics) , engineering
The effect of chlorine impurities on the densification of hot‐pressed silicon nitride has been simulated by the addition of chlorine (H 2 PtCl 6 6H 2 O) to the starting powders. The presence of chlorine retards the α‐β phase transformation during hot‐pressing. Microstructurally, it is found that the chlorine is incorporated in the inter granular noncrystalline phase. In the Y 2 O 3 hot‐pressed material, the chlorine appears to prevent the Y 2 Si 2 O 7 phase from crystallizing.