Growth and characterization of Al2O3/Y3Al5 O12/ZrO2 ternary eutectic fibers

Jong Ho Lee, Akira Yoshikawa, Tsuguo Fukuda, Yoshiharu Waku

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

Al2O3/Y3 Al5O12/ZrO2 ternary eutectic fibers have been grown for the first time by the micro-pulling-down method and their microstructural and mechanical properties investigated as a function of solidification rate. Al2O3/Y3 Al5O12/ZrO2 ternary eutectic fibers 0.3-2 mm in diameter and 500 mm in length have been grown with a pulling rate of 0.1-15 mm/min. The ternary eutectic fibers had homogeneous and regular 'chinese script-like' microstructures. The interlamellar spacing λ exhibited an inverse-square-root dependence on the pulling rate ν according to λ = 8 × ν-1/2, where λ has the dimension of m and ν is in μm/s. The hardness reached 17.4 GPa for fibers grown at a pulling rate of 15 mm/min, and the tensile strength was measured to be 1100 MPa at 25°C and 970 MPa at 1200°C for a fiber grown at a pulling rate of 15 mm/min. The hardness increased as the interlamellar spacing decreased.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalJournal of Crystal Growth
Volume231
Issue number1-2
DOIs
Publication statusPublished - 2001 Sep

Keywords

  • A1. Directional solidification
  • A1. Eutectics
  • A2. Growth from melt
  • A2. Micro-pulling down method
  • B1. Oxides
  • B2. Melt growth composites

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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