Accession Number:

ADA503055

Title:

Freeze-Spray Deposition of Layered Alumina/Zirconia Composites (Preprint)

Descriptive Note:

Journal article Preprint

Corporate Author:

MISSOURI UNIV-ROLLA DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Report Date:

2009-03-01

Pagination or Media Count:

22.0

Abstract:

A novel freeze-Spray Deposition FSD method is described for rapid fabrication of layered composites with controlled layer thickness and uniform microstructure. The graded aluminazirconia composites are fabricated by freeze-spray deposition of ceramic slurries followed by freeze drying. Aqueous slurries with glycerol addition are sprayed on a cooled substrate using an automated 3-D gantry system. Processing parameters such as viscosity of the ceramic slurries, composition and thickness of deposited layers as well as sintering conditions are investigated to improve the fabrication process. Microstructural analysis of the fabricated composites revealed uniform and crack-free transitional layers indicating a strong interfacial bonding between the layers.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE