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Proceedings Paper

Toughening Of Zinc Sulfide
Author(s): Bhaskar S. Majumdar; Peter J. Melling
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Paper Abstract

Although zinc sulfide has good infrared properties, it has poor fracture toughness. Thus, processing or particle-impact induced flaws can make zinc sulfide windows and domes susceptible to cracking under stresses arising from thermal or mechanical loads. An attempt was made in this program to increase the fracture toughness of zinc sulfide by adding zirconium sulfide, which is also transparent in the infrared. By adding different quantities of zirconium sulfide, it was observed that the resultant composite had a toughness that was more than double that of pure zinc sulfide processed in the same manner. More significantly, the toughness improvement was not accompanied by any strength reduction, although the strength of pure zirconium sulfide was only one-fourth that of zinc sulfide. Microstructural examination indicated toughening by crack-bridging by zirconium sulfide, that was stretched into stringers by the processing. The data and details on toughening mechanisms are presented here.

Paper Details

Date Published: 11 September 1989
PDF: 9 pages
Proc. SPIE 1112, Window and Dome Technologies and Materials, (11 September 1989); doi: 10.1117/12.960766
Show Author Affiliations
Bhaskar S. Majumdar, Battelle Memorial Institute (United States)
Peter J. Melling, Battelle Memorial Institute (United States)

Published in SPIE Proceedings Vol. 1112:
Window and Dome Technologies and Materials
Paul Klocek, Editor(s)

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