IMPROVEMENT OF STRENGTH AND RELIABILITY OF STRUCTURAL CERAMICS THROUGH ION IMPLANTATIONS

Award Information
Agency: National Science Foundation
Branch: N/A
Contract: N/A
Agency Tracking Number: 17437
Amount: $49,946.00
Phase: Phase I
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Ues Inc
4401 Dayton-xenia Rd, Dayton, OH, 45432
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Rabi S. Bhattacharya
 Principal Research Scientist
 (513) 426-6900
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE OBJECTIVE OF THIS PROGRAM IS TO ACHIEVE STRENGTH AND RELIABILITY IMPROVEMENTS IN STRUCTURAL CERAMICS THROUGH ION IMPLANTATIONS. THE APPROACH WILL BE TO PRODUCE PRECIPITABLEPHASES BY HIGH DOSE ION IMPLANTATION AND SUBSEQUENT ANNEALING. THE STRENGTH INCREASE IS EXPECTED FROM THE LOCALIZED VOLUME EXPANSION OF THE IMPLANTED REGION DUE TO THE PRESENCE OF THESE PRECIPITATES RESULTING IN THE GENERATION OF COMPRESSIVE SURFACE STRESSES. IF THERMODYNAMICALLY STABLE PRECIPITATES ARE FORMED THEN A TEMPERATURE INDEPENDENT INCREASE IN STRENGTH AND RELIABILITY IS EXPECTED. AND, IF THE PRECIPITATE PHASE IS HARDER THAN THE MATRIX, A SURFACE HARDENING MAY RESULT. IN PHASE I, WE PROPOSE TO CO-IMPLANT SI(+) AND C(+), AND TI(+) AND C(+) INTO SI3N4 TO STUDY THE FORMATIONS OF SIC ANDTIC PRECIPITATES. CHARACTERIZATIONS WILL BE PERFORMED BY USING TRANSMISSION ELECTRON MICROSCOPY. FOUR-POINT-BEND TESTING WILL PROVIDE THE STRENGTH AND RELIABILITY DATA.

* information listed above is at the time of submission.

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