Fabrication of dense material having homogeneous GdAlO3–Al2O3 eutectic-like microstructure with off-eutectic composition by consolidation of the amorphous
✍ Scribed by Yohei Harada; Naofumi Uekawa; Takashi Kojima; Kazuyuki Kakegawa
- Book ID
- 104023065
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 356 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0955-2219
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✦ Synopsis
Off-eutectic microstructures generally have both coarse crystals of rich component and ordinary eutectic microstructures. This paper shows a new method to form a dense bulk material having homogeneous eutectic-like microstructure with off-eutectic compositions. Mixture of Gd 2 O 3 and Al 2 O 3 powders with the off-eutectic composition was melted and quenched rapidly to form the amorphous phase. The amorphous film was pulverized. The dense bulk material could be fabricated by the consolidation of the amorphous powder using spark plasma sintering method. Field emission scanning electron microscope (FE-SEM) observation of the material showed homogeneous fine eutectic-like microstructure without coarse crystals. This is the first case that such material was successfully prepared.