Accession Number:

ADA409403

Title:

High Temperature Composites. work Unit Directive (WUD) 53

Descriptive Note:

Bibliography 1 Oct 1995-3 Sep 2002

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE

Personal Author(s):

Report Date:

2002-09-01

Pagination or Media Count:

22.0

Abstract:

There were numerous interrelated issues that were addressed as a part of the composite interface control effort. Crack deflection is a complex function of the fracture properties of the constituents. Hence, in addition to designed oxide coatings for both oxide and non- oxide fibers, substantial activity has pursued understanding and controlling fiber degradation, isolating and understanding aspects of the failure process, designing processes, and tests that provide definitive criteria for evaluation. These efforts have resulted in the identification and solution of a persistent and pervasive problem with fiber degradation during coating. This has finally enabled evaluation of the coatings in real composites made both in-house and as part of numerous collaborations with industry, academe, and other government laboratories. This in turn led to the recent definitive proof of the viability of oxide coating approaches in real composites. With this recent definitive demonstration of oxide coating viability, the specific focus is shifting towards understanding how best to design the overall composite system to best employ the new coatings. The word design is used in the sense of the choice of the basic constituents of the composites and the choice and execution of the nano and microstructures of the constituents, and the micro and macrostructures of the composites.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE