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Texture, Stress, and Microstructure

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Texture, Stress, and Microstructure / 1995 / Article

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Textures in Ceramics

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Volume 24 |Article ID 931426 | https://doi.org/10.1155/TSM.24.75

T. Walker, N. Mattern, M. Herrmann, "Texture and Microstructure in Hot-Pressed Si3N4", Texture, Stress, and Microstructure, vol. 24, Article ID 931426, 17 pages, 1995. https://doi.org/10.1155/TSM.24.75

Texture and Microstructure in Hot-Pressed Si3N4

T. Walker,1 N. Mattern,1 and M. Herrmann2

1lnstitut für Festkörper- und Werkstofforschung Dresden e.V., Germany

2Fraunhofer Institut für Keramische Technologien und Sinterwerkstoffe, Dresden, Germany

Received10 Sep 1994
Accepted07 Nov 1994

Abstract

The texture formation in hot-pressed Si3N4-ceramics was investigated by means of X-ray diffraction. A ring-fibre texture is observed with the basal plane (002) perpendicular to the hot-pressing axis. The texture index of hot-pressed Si3N4 depends on the starting powder mixture and process parameters. The α→β phase transfomation and the growth of β-Si3N4 needlelike grains are correlated with the texture. Measurements of fracture toughness and aspect ratio confirm the correlation with microstructure. The structure is the result of crystal growth and flow process during hot-pressing.

Copyright © 1995 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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