'Chemically bonded ceramic matrix composites: densification and conversion to diffusion bonding'

Bradley R. Johnson, Mehmet A. Gulgun, Waltraud M. Kriven

Research output: Contribution to journalConference articlepeer-review

Abstract

Chemically bonded ceramics appear to be a promising alternative route for near-net shape fabrication of multi-phase ceramic matrix composites (CMC's). The hydraulic (and refractory) properties of fine mono-calcium aluminate (CaAl2O4) powders were used as the chemically bonding matrix phase, while calcia stabilized zirconia powders were the second phase material. Samples containing up to 70 wt% (55 vol%) zirconia have been successfully compacted and sintered. Various processing techniques were evaluated. Processing was optimized based on material properties, dilatometry and simultaneous thermal analysis (DTA/TGA). The physical characteristics of this novel CMC were characterized by hardness, density, and fracture toughness testing. Microstructures were evaluated by SEM and phase identification was verified using XRD.

Original languageEnglish (US)
Pages (from-to)67-72
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume365
StatePublished - 1995
EventProceedings of the 1994 Fall Meeting - Boston, MA, USA
Duration: Nov 28 1994Dec 2 1994

ASJC Scopus subject areas

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

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