Thermomechanical Behaviour of TiB2-AlN Composites

Thermomechanical Behaviour of TiB2-AlN Composites

An attempt was made to correlate the compositions and microstructures of AlN-TiB2 particulate composites with their thermomechanical properties. The compaction at 1900C of commercially available powders (AlN and TiB2), under an isostatic argon pressure of 195 MPa, led to the formation of dense compo...

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Veröffentlicht in:Key engineering materials 1997-04, Vol.132-136, p.524-527
Hauptverfasser: Desmaison-Brut, Martine, Richter, G., Schneider, S.V., Gault, Christian
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Sprache:eng
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Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
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container_title Key engineering materials
container_volume 132-136
creator Desmaison-Brut, Martine
Richter, G.
Schneider, S.V.
Gault, Christian
description An attempt was made to correlate the compositions and microstructures of AlN-TiB2 particulate composites with their thermomechanical properties. The compaction at 1900C of commercially available powders (AlN and TiB2), under an isostatic argon pressure of 195 MPa, led to the formation of dense composites (relative density of 99%). Various grades of powders were used. The composite obtained by mixing the finest grain powders at a composition of 75 mol% of TiB2 and 25 mol% of AlN, has a Vickers microhardness of 3862 plus or minus 638, strength of 623 plus or minus 60 MPa, and a toughness of 5.6 plus or minus 0.2 MPa.m1/2. When the material was heated to 1000C, creep deformation was not detected. On the other hand, a constant increase in Young's moduli and thermal expansion coefficients was found with increasing TiB2 content. 11 refs.
doi_str_mv 10.4028/www.scientific.net/KEM.132-136.524
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subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
title Thermomechanical Behaviour of TiB2-AlN Composites
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