Accession Number:

ADA583075

Title:

Preparation of Oxidation-Resistant Ultra High Melting Temperature Materials and Structures Using Laser Method

Descriptive Note:

Final rept. 1 Mar 2006-30 Nov 2009

Corporate Author:

VIRGINIA UNIV CHARLOTTESVILE DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Report Date:

2009-06-06

Pagination or Media Count:

37.0

Abstract:

This report describes laser and hybrid laser microwave processing of ultra-high temperature ceramic UHTC materials. We have successfully developed new UHTC based composite materials that are capable of dealing with harsh environment encountered by hypersonic cruise and atmospheric re-entry vehicles. The advanced ZrB2-metal composites provide good performance at much lower densities than other UHTCs like hafnium diboride HfB2 and refractory metals such as rhenium and tungsten. In addition, these ceramic-metal composites cermets reduce the likelihood of mechanical failures by increasing fracture toughness and thermal shock resistance that are inherent properties of mostly brittle ceramics, but at the same time enhance some material properties like hardness that usually lack in metals.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Laminates and Composite Materials
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE