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

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$69,905.00
Award Year:
2008
Program:
STTR
Phase:
Phase I
Contract:
N68335-08-C-0301
Award Id:
85122
Agency Tracking Number:
N08A-003-0351
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
5395 West 700 South, Salt Lake City, UT, 84104
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
858801483
Principal Investigator:
Niladri Dasgupta
Research Scientist
(801) 530-4987
ndasgupta@msrihome.com
Business Contact:
Anthony Decheek
Contract Administrator
(801) 530-4987
adecheek@msrihome.com
Research Institute:
UNIV. OF UTAH
Dinesh Shetty
122 S. Central Campus Dr.
Salt Lake City, UT, 84112
(801) 581-6449
Nonprofit college or university
Abstract
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 fYm. 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 fYm) and long wave (8-14 fYm) 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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