TEXTURE DEVELOPMENT VIA GRAIN ROTATION IN BETA-SILICON NITRIDE

A grain rotation model first described by Jeffery is applied to quanti tatively predict texture development and texture heterogeneity in hot- worked beta-Si3N4. Comparison of model predictions and experimental re sults indicates that such models can successfully predict the texture developed in beta-Si3N4 with significant differences observed at heigh t reductions greater than 60% (true strain almost-equal-to -0.9). Appl ications include a description of textures in hot forging, plane strai n compression, and various green body forming techniques including tap e casting and extrusion.