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Hot hardness and creep ofSi 3N 4 SiCmicro/nano- and nano/nano-composites

Authors
Journal
Nanostructured Materials
0965-9773
Publisher
Elsevier
Publication Date
Volume
8
Issue
4
Identifiers
DOI: 10.1016/s0965-9773(97)00182-7

Abstract

Abstract In the present study, mixtures of conventional α-Si 3N 4 with β-SiC or nanosized β-SiC and ternary Si-C-N (15–20 nm) powders without and with Y 2O 3 Al 2O 3 as additive were used as starting materials. By Hot Isostatic Pressing of these powders, micro/nano-composites and nano/nanocomposites were obtained. Dynamic hot hardness at 800, 1000 and 1100 °C and creep behavior at 1600 °C for pressures of 50, 100 and 150 MPa were used to characterize the materials. The influence of grain size and SiC content on these properties is discussed.

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