Accession Number:

AD0713336

Title:

ORIENTED EUTECTIC MICROSTRUCTURES IN THE SYSTEM Al2O3/ZrO2

Descriptive Note:

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Report Date:

1970-03-02

Pagination or Media Count:

9.0

Abstract:

Oriented eutectic microstructures have been produced in the system Al2O3ZrO2 using a Bridgman-type crystal-growing furnace. Ingots consisted of elongated columnar grains or colonies. Inside the colonies a rod-type eutectic microstructure consisting of rods of ZrO2 surrounded by an Al2O3 matrix was observed. The eutectic point was re-established at 63 mo1 Al2O337.0 mo1 ZrO2 and 1870C. Al203 is the first phase to nucleate when eutectic growth occurs.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE