Title

Characterization of Zirconium Diboride for Thermal Protection Systems

Abstract

Zirconium diboride, containing silicon carbide or molybdenum disilicide to form a passive oxide protective layer, was evaluated as a thermal barrier coating for space vehicles. Samples containing 0-30 vol% of SiC or MoSi2 were prepared by uniaxial hot pressing at 1900 C. The additions enhanced the strength, achieving a maximum of approximately 1 GPa at an addition of 30 vol%. An improvement in fracture toughness was also observed. The additions had the desired effect of enhancing the oxidation resistance, the composite containing 30 vol% MoSi2 having a weight gain of only 0.004 mg/mm2 on heating in air at 1500 C.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Fracture Toughness; Hot Pressing; Intermetallics; Molybdenum Disilicides; Oxidation Resistance; Space Vehicles; Thermal Barrier Coatings; Thermal Protection

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Trans Tech Publications, All rights reserved.

This document is currently not available here.


Share

 
COinS