S-phase sialon ceramics; Microstructure and properties
UNSPECIFIED (2004) S-phase sialon ceramics; Microstructure and properties. In: 4th International Symposium on Nitrides, Mons, BELGIUM, NOV 17-19, 2003. Published in: SILICATES INDUSTRIELS, 69 (7-8 Sp. Iss. 2). pp. 225-231.Full text not available from this repository.
Sialon ceramics based on the composition of M2S10Al2O4N14 (M = Sr or Ba) have been sintered, at 1600-1750degreesC, to near-monophase ceramics. Sr loss during sintering results in higher residual silicate phase than in the Ba-stabilised form in which the measured S-phase composition is Ba2Si12-xAlxO2-xN16-x, with x = 2 +/- 0.2. The S-phase crystallises in elongated platelet morphology with preferred growth parallel to the orthorhombic c axis and primary facet planes parallel to (100) and (010). NMR spectroscopy of the Sr-S phase confirms the mixed SiN4/SiN3O tetrahedral coordination suggested from earlier x-ray studies.
The Ba-S phase ceramic has an acoustically-measured Young modulus of >220 GPa, a hardness of 13.5 GPa and a fracture toughness of 4.5-5 MPa. rootm..
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||T Technology > TP Chemical technology|
|Journal or Publication Title:||SILICATES INDUSTRIELS|
|Publisher:||BELGIAN CERAMIC SOCIETY|
|Official Date:||July 2004|
|Number:||7-8 Sp. Iss. 2|
|Number of Pages:||7|
|Page Range:||pp. 225-231|
|Title of Event:||4th International Symposium on Nitrides|
|Location of Event:||Mons, BELGIUM|
|Date(s) of Event:||NOV 17-19, 2003|
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