Accession Number:

ADA261705

Title:

Interface Engineering in Oxide Fiber/Oxide Matrix Composites

Descriptive Note:

Annual rept. 1 Mar 1992-28 Feb 1993

Corporate Author:

NEW MEXICO INST OF MINING AND TECHNOLOGY SOCORRO DEPT OF METALLURGICAL AND MATERIALS ENGINEERING

Personal Author(s):

Report Date:

1993-02-28

Pagination or Media Count:

45.0

Abstract:

We have shown in earlier work that fiber roughness is a very important parameter along with the thermal mismatch between the components. PRD- 166 fiber, used so far, is a very rough fiber. Saphikon, single crystal alpha- alumina, is a relatively smooth fiber, but very expensive due to its processing cost. A new polycrystalline alumina fiber, Nextel 610, has recently become available. Due to its smoother surface than that of PRD-166 fiber, this fiber can be a good reinforcement candidate in oxideoxide composites. We have done microstructural and mechanical characterization of Nextel 610 fiber. The tensile strength of Nextel 610, after exposure to 900-deg C, 1100 deg-C, and 1300-deg C was determined using a two-parameter Weibull distribution. It was observed that the primary reason for the loss of the fiber strength was the grain growth.

Subject Categories:

  • Laminates and Composite Materials
  • Textiles
  • Metallurgy and Metallography
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE