SIALON

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$50,000.00
Award Year:
1984
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
1168
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Gorham International Inc.
209 Mosher Road, South Windham, ME, 04038
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
ANDREW C. NYCE, PH.D.
VICE PRESIDENT
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
THE OBJECTIVE OF THE PROPOSED STUDY IS TO DETERMINE THE FEASIBILITY OF FULLY DENSIFYING A SIALON VIA SINTER/HIP PROCESSING. SINTER/HIP IS AN INNOVATIVE APPROACH TO MATERIALS CONSOLIDATION WHICH INCORPORATES SINTERING AND CONTAINERLESS HIP'ING (HOT ISOSTATIC PRESSING) INTO A SINGLE, UNINTERRUPTED CYCLE CONDUCTED IN A HIP SYSTEM. IN THIS PROPOSED PROCESS TECHNOLOGY, GREEN PREFORMS ARE SINTERED UNDER MODERATE N2 PRESSURE TO HIGH DENSITY AND CLOSED POROSITY IN THE HIP VESSEL; FOLLOWING COMPLETION OF THE DESIGNATED SINTERING PHASE OF THE CYCLE, THE VESSEL IS RAPIDLY PRESSURIZED TO A SUITABLE HIP'ING PRESSURE (E.G., 30 KPSI), AND THE HIP PHASE OF THE CYCLE IS THEN CONDUCTED. SINTER/HIP THUS DIFFERS FROM THE "CONVENTIONAL" CONCEPT OF CONTAINERLESS HIP'ING, SINCE SINTER/HIP DOES NOT REQUIRE OR EMPLOY SEPARATE SINTERING AND HIP'ING SYSTEMS. ADDITIONALLY, SINTER/HIP MAKES POSSIBLE PROCESSING CONDITIONS DIFFERENT FROM THOSE USED IN THE "CONVENTIONAL" SINTER + CONTAINERLESS HIP APPROACH. THUS SINTER/HIP MAY YIELD TECHNICALLY UNIQUE MATERIALS WITH PROPERTIES AND MICROSTRUCTURES UNLIKE THOSE PRODUCED VIA OTHER PROCESS TECHNOLOGIES. THE PROPOSED STUDY WILL AIM AT FULLY DENSIFYING A 92 WT.% SI3N4 + 6 WT.% Y2O3 + 2 WT.% AL2O3 SIALON VIA SINTER/HIP. ROOM TEMPERATURE MODULUS OF RUPTURE VALUES FOR SINTER/HIP'ED SPECIMENS WILL BE GENERATED AND COMPARED WITH MOR VALUES FOR COMPOSITIONALLY SIMILAR SINTERED AND SINTERED + CONTAINERLESS HIP'ED SPECIMENS.

* information listed above is at the time of submission.

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