Residual stresses in YAG phase in directionally solidified eutectic Al2O3/YAG ceramic composite estimated by X-ray diffraction
✍ Scribed by J.J. Sha; S. Ochiai; H. Okuda; Y. Waku; N. Nakagawa; A. Mitani; M. Sato; T. Ishikawa
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 793 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0955-2219
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✦ Synopsis
The residual stresses in YAG phase in directionally solidified eutectic (DSE) Al 2 O 3 /Y 3 Al 5 O 12 (YAG) ceramic composite were estimated by X-ray diffraction technique. The YAG skeleton specimen without Al 2 O 3 phase, extracted from the composite, was used as a thermally-induced stress-free reference specimen. The X-ray stress measurements with Cu K␣ irradiation were performed on the two planes: parallel and perpendicular to the solidification direction. The estimated residual stresses on average were -220 MPa and -157 MPa on the planes parallel and perpendicular to the solidification direction, respectively. The measured residual stresses were described fairly well by the calculation based on a lamellar model under the condition of the stress-free temperature 1400-1600 K.