Published October 1989
| Version v1
Journal article
Grain-boundary phase crystallization of silicon nitride with material loss during heat treatment
Creators
- 1. Tokyo Shibaura Electric Co. Ltd., Kawasaki, Kanagawa (Japan). Research and Development Center
- 2. New Material Engineering Lab., Material and Component Group, Toshiba Corp., Yokohama 235 (Japan)
Description
This paper reports on an analysis made of the Si3N4 · Y2O3 crystallization process from a compacted Si3N4 powder (composition: 5 wt% Y2O3 and 2 wt% Al2O3) during heat treatment in various powder beds. X- ray diffraction was used to measure the degree of crystallization, which was correlated with weight loss. Crystallization and weight loss were affected significantly by the SiO2 content in the packing powder. Crystallization correlated strongly with the weight loss. The dominant loss was attributed to SiO volatilization from the Y-Si-Al-O-N liquid. The crystallization mechanism with the loss of material was interpreted using a solubility - supersolubility diagram at constant temperature
Additional details
Publishing Information
- Journal Title
- Journal of the American Ceramic Society
- Journal Volume
- 72
- Journal Issue
- 10
- Series
- J. Am. Ceram. Soc.
- Journal Page Range
- 2014-2016
- ISSN
- 0002-7820
- CODEN
- JACTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21066884
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHEMICAL COMPOSITION; CRYSTALLIZATION; GRAIN BOUNDARIES; HEAT TREATMENTS; PHASE STUDIES; POWDERS; SILICON NITRIDES; X-RAY DIFFRACTION; YTTRIUM OXIDES
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL STRUCTURE; DIFFRACTION; MICROSTRUCTURE; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PNICTIDES; SCATTERING; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS