Microstructure and High-Temperature Strength of Directionally Solidified Al2O3/YAG/ZrO2 Eutectic Composite

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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The microstructures of an A2O3/YAG/ZrO2 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)303-306
Number of pages4
JournalMaterials Transactions
Volume45
Issue number2
DOIs
Publication statusPublished - 2004 Feb

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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