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: N68335-08-C-0301
Agency Tracking Number: N08A-003-0351
Amount: $69,905.00
Phase: Phase I
Program: STTR
Awards Year: 2008
Solicitation Year: 2008
Solicitation Topic Code: N08-T003
Solicitation Number: 2008.A
Small Business Information
5395 West 700 South, Salt Lake City, UT, 84104
DUNS: 858801483
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: Y
Principal Investigator
 Niladri Dasgupta
 Research Scientist
 (801) 530-4987
Business Contact
 Anthony Decheek
Title: Contract Administrator
Phone: (801) 530-4987
Research Institution
 Dinesh Shetty
 122 S. Central Campus Dr.
Salt Lake City, UT, 84112
 (801) 581-6449
 Nonprofit college or university
This Small Business Technology Transfer Research (STTR) Phase I proposal from Materials and Systems Research, Inc. (MSRI) and University of Utah (research institution) seeks to fabricate single-phase, polycrystalline KZr2P3O12 (KZP) and Al2-x(HfMg)x(WO4)3 ceramics with densities greater than 99.95% and a mean grain size of 1 ƒÝm. 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 ƒÝm) and long wave (8-14 ƒÝm) 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 I 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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