Synthesis, properties, and oxidation of alumina titanium nitride composites
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Synthesis, properties, and oxidation of alumina titanium nitride composites
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| Creator |
Mukerji, Joydeb
Biswas, S K |
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| Subject |
Engineering Materials
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| Description |
AlZ03-TiN composites varying from 60 to 66.6 mol% TiN were prepared by an in situ reaction between Ti02 and AlN.
NZ or O2 evolution takes place, depending on the composition selected. A pseudobrookite (PB) phase appears
in the reaction product, the amount decrasing; as the
Ti02 : AlN ratio becomes poor in AlN. The in situ reaction product can be pressureless sintered to 94% to 97% theoretical density at 1600°C in N2. The four-point
flexural strength varies from 280 to 430 MPa at room temperature. Tlhe fracture toughness is 3 to 4.7 MPa -
ml". Oxidation of a 94% dense TiN-A1203 composite in the
temperature range 710" to 1050°C was also studied. A layer of Ti02 (rutile) protects the composite at 710°C from
further oxidation with a weight gain of 0.08 mg/cm2 in 90
min. In the temperature range 820" to 1O5O0C, the initial
oxidation kinetics are parabolic, with an activation energy of 216.5 kJ/mol. Linear oxidation kinetics with an activation energy of 113.7 kJ/mol pertain at longer
times.
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| Publisher |
Wiely / American Ceramic Society
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| Date |
1990-01
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/3177/1/mukerji1990.pdf
Mukerji, Joydeb and Biswas, S K (1990) Synthesis, properties, and oxidation of alumina titanium nitride composites. Journal of the American Ceramic Society, 73 (1). pp. 142-145. ISSN 0002-7820 |
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| Relation |
http://cgcri.csircentral.net/3177/
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