Growth and diameter control of Al2O3/Y3Al5O12 eutectic fiber by micro-pulling-down method and its high temperature strength and thermal stability

A. Yoshikawa, K. Hasegawa, T. Fukuda, K. Suzuki, Y. Waku

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

We investigated the fiber growth of the oxide eutectic composites sapphire/Y3Al5O12 (YAG) using the micro pulling down (μ-PD) method. Sapphire and YAG phases were crystalline. They form a continuous three-dimensional networking with some preferred orientation of the growth direction. We have succeeded in control the fiber diameter from 2 mm to 150 μm. The maximal length was about 500 mm. The scale of the microstructure was also controlled from 20 μm to 0.5 μm. The eutectic fibers have superior high-temperature strength properties around 1500 °C. In the tensile test at this temperature, these fibers showed remarkable (about 10%) plastic deformation occurring by dislocation motion. The microstructures of these eutectic fibers have a very high thermal stability. No grain growth was observed after even 75 hours heat treatment at 1500 °C in an air atmosphere.

Original languageEnglish
Pages (from-to)275-282
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume20
Issue number4
Publication statusPublished - 1999 Dec 1
EventProceedings of the 1999 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - Cocoa Beach, FL, USA
Duration: 1999 Jan 251999 Jan 29

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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