Chapter 59. Syntheses of Alkaline Earth Aluminatelzirconia Composites from Metal-Bearing Precursors

  1. Don Bray
  1. Kirk A. Rogers,
  2. Ramazan Citak,
  3. Pragati Kumar and
  4. Ken H. Sandhage

Published Online: 23 MAR 2010

DOI: 10.1002/9780470294499.ch59

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4

How to Cite

Rogers, K. A., Citak, R., Kumar, P. and Sandhage, K. H. (1998) Syntheses of Alkaline Earth Aluminatelzirconia Composites from Metal-Bearing Precursors, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 19, Issue 4 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294499.ch59

Author Information

  1. Materials Science and Engineering The Ohio State University, Columbus, OH 43210

Publication History

  1. Published Online: 23 MAR 2010
  2. Published Print: 1 JAN 1998

ISBN Information

Print ISBN: 9780470375594

Online ISBN: 9780470294499

SEARCH

Keywords:

  • porcelain;
  • enameling;
  • atomizing;
  • orientation;
  • variable

Summary

Two metal-bearing precursor routes have been examined for the fabrication of composites in the BaAl2O4-MgAl2O4-ZrO2 system: a powder metallurgy (PM) process and a melt infiltration (MI) process. In the PM process, mixtures ofBa, Mg, Al, Al2O3, and ZrO2 (i.e., >50 vol% ductile metal) of desired stoichiometry were prepared by high-energy vibratory ball milling. The milled powder was uniaxially pressed into ∼80% dense green bodies and then fired in flowing O2 from 100 to 1650°C to allow for oxidation and the formation of oxide compounds. In the MI process, porous Al2O3-ZrO2 compacts were infiltrated with molten Mg in flowing Ar-SYoH2 at ambient pressure. After solidification, the dense green bodies (4% porosity) were fired in O2 at 425 to 1650°C to allow for oxidation and compound formation. The phases and microstructures produced at various stages of transformation were evaluated with XRD and SEMEDX analyses.