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Proceedings Paper

Mechanical evaluation of yttria
Author(s): Daniel C. Harris; W. R. Compton; Alice M. Harper; George Hayes; Marian E. Hills; Nancy A. Jaeger; Larry D. Sawyer; Richard C. Scheri; James L. Stokes
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Paper Abstract

A method is described to make multiple measurements of the strength of a single hemispherical ceramic dome with a ring-on-ring flexure test of disklike sections removed from the dome by a core drill. Preliminary results show that dome cores exhibit lower strength than flat disks, because the domes have larger critical surface flaws than those present on disks. Careful attention to polishing of domes is required to realize maximum strength from the domes. The fracture toughness of optical quality yttria disks and hemispherical domes was found to be approximately 0.7 MPa'I m.

Paper Details

Date Published: 1 October 1990
PDF: 10 pages
Proc. SPIE 1326, Window and Dome Technologies and Materials II, (1 October 1990); doi: 10.1117/12.22478
Show Author Affiliations
Daniel C. Harris, Naval Weapons Ctr. (United States)
W. R. Compton, Naval Weapons Ctr. (United States)
Alice M. Harper, Naval Weapons Ctr. (United States)
George Hayes, Naval Weapons Ctr. (United States)
Marian E. Hills, Naval Weapons Ctr. (United States)
Nancy A. Jaeger, Naval Weapons Ctr. (United States)
Larry D. Sawyer, Naval Weapons Ctr. (United States)
Richard C. Scheri, Naval Weapons Ctr. (United States)
James L. Stokes, Naval Weapons Ctr. (United States)

Published in SPIE Proceedings Vol. 1326:
Window and Dome Technologies and Materials II
Paul Klocek, Editor(s)

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