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Thermal-Shock-Resistant Sensor Windows and Domes for High-Speed Flight Made of Low-Expansion Ceramics

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-10-C-0078
Agency Tracking Number: N08A-003-0351
Amount: $750,000.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: N08-T003
Solicitation Number: 2008.A
Solicitation Year: 2008
Award Year: 2010
Award Start Date (Proposal Award Date): 2009-12-31
Award End Date (Contract End Date): 2013-07-31
Small Business Information
5395 West 700 South
Salt Lake City, UT 84104-
United States
DUNS: 858801483
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: Yes
Principal Investigator
 Niladri Dasgupta
 Research Scientist
 (801) 530-4987
Business Contact
 Anthony Decheek
Title: Research Scientist
Phone: (801) 530-4987
Research Institution
 University of Utah
 Todd Nilsen
1471 Federal Way
Salt Lake City, UT 84102-
United States

 (801) 581-8948
 Nonprofit College or University

This Small Business Technology Transfer Research (STTR) Phase II proposal from Materials and Systems Research, Inc. (MSRI) and University of Utah (research institution) seeks to fabricate single-phase, polycrystalline tungstate ceramics with densities greater than 99.95% and a mean grain size of less than 1 um. These ceramics have been chosen because of their low thermal expansion and low elastic modulus that render them highly thermal-shock resistant and, therefore, suitable for IR windows and domes in high-speed flight. The optical transmittance of these polycrystalline ceramics is expected to be comparable to that of sapphire in the midwave (3-5 um) and long wave (8-14 um) infrared ranges. The high density and small grain size will be achieved by a fabrication route that will combine the following steps: preparation of a stable suspension of submicron powders, forming a green compact by pressure filtration, and a two-stage densification by pressureless sintering followed by hot-isostatic pressing. The proposed fabrication route has two distinct advantages over conventional powder processing methods: (a) it eliminates microstructural inhomogenities that limit strength, durability and optical transmittance in conventional powder processing, (b) it eliminates a number of steps involved in conventional processing and leads to a lower cost. Research in Phase II will fabricate disks 50 mm in diameter and 2-3 mm in thickness. Material characterization will be done by University of Utah under a subcontract.

* Information listed above is at the time of submission. *

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