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Direct Synthesis and Sintering of Silicon Nitridenitanium Nitride Composite
Author(s) -
Hillinger Gerald,
Hlavacek Vladimir
Publication year - 1995
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.1151-2916.1995.tb08830.x
Subject(s) - sintering , materials science , silicon nitride , fracture toughness , machining , composite number , ceramic , electrical discharge machining , composite material , nitride , silicon , metallurgy , layer (electronics)
Electrical discharge machining is an attractive machining technique which requires electrically conductive ceramic materials. Silicon nitride based composites with 35–40% of TiN possess electrical conductivity high enough to use this machining technique. The composite powder was prepared by combustion synthesis and densified by pressure sintering (sintering aids 6 wt% of Y 2 O 3 and 4 wt% of A1,0 3 ). High fracture toughness, K c 10.5 MPa . m 1/2 , is typical for the composite. It can be expected that this material can compete with pure silicon nitride in applications requiring complex machining.