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Ammonia formation caused by the presence of water in the wet grinding of silicon nitride powderSi3 N4 powder (amorphous, alpha-, and beta-Si3 N4) was mixed with MeOH containing 8.87 mol. % H2O and ground. The NH3 generation rapidly increased after a grinding time of 100 hours. Silicon nitride sintered material was chosen as one of the high temperature, high strength structural materials and studies of the control of the raw material powder, preparation of the sintered body (finding the right assistant, hot press, high pressure sintering, fracture toughness and oxidation at high temperature were performed.
Document ID
19850015626
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kanno, Y.
(NASA Headquarters Washington, DC United States)
Suzuki, K.
(NASA Headquarters Washington, DC United States)
Kuwahara, Y.
(NASA Headquarters Washington, DC United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1984
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
NASA-TM-77746
NAS 1.15:77746
Accession Number
85N23937
Funding Number(s)
CONTRACT_GRANT: NASW-4004
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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