Microstructure and high-temperature strength of directionally solidified Al 2O 3/YAG/ZrO 2 eutectic composite

Yonosuke Murayama, Shuji Hanada, Jong Ho Lee, Akira Yoshikawa, Tsuguo Fukuda

Research output: Contribution to journalArticlepeer-review

Abstract

The microstructures of an A 2O 3/YAG/ZrO 2 eutectic Melt-Growth-Composite (MGC) solidified unidirectionally by the modified-pulling-down method were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and electron backscattered pattern (EBSP) method. The anisotropy of strength was investigated by hardness tests and compression tests at various directions of the composite at elevated temperatures. The eutectic MGC has strong preferred growing orientation and the constituent phases hold the orientation relationship. The eutectic MGC shows excellent high-temperature strength and can deform plastically above about 1500 K. High-temperature strength above 1500 K depends on strain rate, temperature and orientation.

Original languageEnglish
Pages (from-to)488-492
Number of pages5
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume69
Issue number6
DOIs
Publication statusPublished - 2005 Jun

Keywords

  • Al O /YAG/ZrO eutectic composite
  • Crystallographic texture
  • Electron backscattered pattern (EBSP)
  • High-temperature strength
  • Melt-growth-composite (MGC)
  • Strength anisotropy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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