Strengthening of Structural Ceramics by Differential Creep
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{'SignBlockName': 'Ritchie B. Coryell', 'PO_EMAI': None, 'PO_PHON': None}
A novel method for strengthening ceramics and allowing strength                 retention to  high temperature is proposed.  The Phase I research               will determine the feasibility of introducing substantial surface               compressive residual stresses in alumina, silicon carbide, and                  silicon nitride using a differential creep mechanism.                           The Phase II research optimize parameters for controlling the                   magnitude and stress distribution achievable by this technique which            is analogous to thermal tempering of glass.  The novel concepts                 proposed to create these residual stresses will allow them to be                retained up to the temperature at which creep is substantial.  This             will allow strengthening to temperatures on the order of 1300-1600 C            for the materials studied in Phase I.  This is in contrast to other             methods of introducing residual stresses where the stresses are                 nonexistant above 1000 C.  The successful completion of the Phase I             research will demonstrate that this technique is applicable to a wide           variety of ceramics, for example: Structural ceramics with improved             performance at high temperatures used in adiabatic diesel and gas               turbine engines.  Other applications where improved performance is              expected include cutting tools, wear parts, die liners, valves, and             ball bearings.
{'FirstName': 'Raymond', 'LastName': 'Cutler', 'PI_MID_INIT': 'A', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Raymond A Cutler', 'EmailAddress': 'cutler@ceramatec.com', 'PI_PHON': '8019782126', 'NSF_ID': '000426021', 'StartDate': '01/01/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'CeraMem Corporation', 'CityName': 'Waltham', 'ZipCode': '024533701', 'PhoneNumber': '6178994495', 'StreetAddress': '12 Clematis Avenue', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Massachusetts', 'StateCode': 'MA', 'CONGRESSDISTRICT': '07', 'CONGRESS_DISTRICT_ORG': 'MA07', 'ORG_UEI_NUM': 'NJ1JNK3RMNB7', 'ORG_LGL_BUS_NAME': None, 'ORG_PRNT_UEI_NUM': None}
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{'Code': '5371', 'Text': 'SBIR Phase I'}
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