Consolidation of Nanograin Ceramics

Award Information
Agency: Department of Defense
Branch: Army
Contract: W31P4Q-05-C-R105
Agency Tracking Number: A043-170-2701
Amount: $119,820.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
P. O. Box 278, Hopkinton, MA, 01748
DUNS: 796672061
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Marian Pascucci
 Principal Investigator
 (508) 460-0300
Business Contact
 Marina Pascucci
Title: President
Phone: (508) 460-0300
Research Institution
The proposed program will demonstrate the feasibility of consolidating nanoparticle dispersions of high purity yttria (Y2O3) to produce fine grain (< 1 ¿m) infrared transparent material for supersonic missile domes and windows. Previously funded efforts to produce IR transparent yttria resulted in material with high transmittance but insufficient strength to withstand the mechanical and thermal stresses imposed by the application conditions. Nano and small grain ceramics offer the potential for improved mechanical strength over their larger grain counterparts. CeraNova Corporation has developed techniques for shaping and densifying nanoparticle alumina to produce transparent polycrystalline alumina with grain size 400-700 nm, excellent transmittance in the MWIR (3-5¿m), and mechanical properties superior to sapphire. These techniques, and previous experience gained from earlier work on transparent yttria, will be applied to the proposed program, which will utilize dispersions of yttria-based nanoparticulates supplied by a nano-powder provider. CeraNova's proposed approach involves shape-forming and consolidation of particle dispersions and a two-stage densification process to achieve full density and control grain growth. The objective is to achieve transmittance ~80% in the 3-5¿m region for 2mm thick disks and mechanical strength twice as great as that of the conventional, large grain equivalent.

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

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