About this Journal Submit a Manuscript Table of Contents
ISRN Metallurgy
Volume 2012 (2012), Article ID 670389, 6 pages
http://dx.doi.org/10.5402/2012/670389
Research Article

Development of MoSi2-SiC Component for Satellite Launch Vehicle

Materials And Metallurgy Group, Materials And Mechanical Entity, Vikram Sarabhai Space Centre, Indian Space Research Organisation, Trivandrum 695 022, India

Received 7 August 2012; Accepted 29 August 2012

Academic Editors: D. Escalera and P.-Y. Lee

Copyright © 2012 G. P. Khanra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Intermetallic base MoSi2-SiC composite, an excellent high temperature oxidation-resistant material meant for the aerospace structural applications between 1600°C and 1700°C under oxidizing environment, has been developed successfully using powder metallurgy techniques. Mechanically milled (MM) MoSi2 powder, blended with SiC particulate was consolidated by vacuum hot pressing, yielded about 98.5% theoretical density. The composite has been characterized for physical, mechanical, and thermal properties. Properties were found satisfactory. Machining of semis to intricate shape was possible through electro-discharge machining (EDM) process. Plasma arc jet test (PAJT) under argon and argon + oxygen environment has proved its excellent high temperature oxidation resistance properties as it could sustain high heat flux up to 250 W/cm2 under oxidizing environment. The component realized has full potential to be used in critical aerospace application. This paper highlights the details of experimental work carried out and its characteristic properties attained.