Development of adherent ceramic coatings to reduce contact stress damage of ceramics. Final report: DOE/ORNL Ceramic Technology Project
- GTE Labs., Inc., Waltham, MA (United States)
Strongly adherent coatings were deposited on reaction bonded Si{sub 3}N{sub 4} (RBSN), sintered SiC (SSC), and HIP`ed Si{sub 3}N{sub 4} (HSN) and using a newly developed chemical vapor deposition (CVD) process. Performance of the coating was assessed by oxidation, strength and contact stress testing. A new method was developed to experimentally determine the strength and Weibull modulus of thin brittle films on ceramic substrates. A significant portion of the study was devoted to numerical modeling of the coatings in order to understand the contributions of residual stress as different coating materials and thicknesses were combined. Coating designs were further analyzed by simulating the crack growth behavior in multilayer films while accounting for the interface fracture mechanics. This work has shown that the Al{sub 2}0{sub 3+}ZrO{sub 2} composite coating developed in this program can provide resistance to oxidation and contact stress. Commercial application of the composite coating has been successfully demonstrated by useof the Al{sub 2}0{sub 3+}ZrO{sub 2} composite as a protective coating on a Si{sub 3}N{sub 4} cutting tool.
- Research Organization:
- Oak Ridge National Lab., TN (United States); GTE Labs., Inc., Waltham, MA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10145939
- Report Number(s):
- ORNL/Sub--89-95915/2; ON: DE93012518
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of adherent ceramic coatings to reduce contact stress damage of ceramics
High temperature coating study to reduce contact stress damage of ceramics: Final report. [ZrO/sub 2/ coatings on Si/sub 3/N/sub 4/ and SiC against contact stress]
Interfacial chemistry-structure and fracture of ceramic composites
Technical Report
·
Sat Oct 31 23:00:00 EST 1992
·
OSTI ID:6623608
High temperature coating study to reduce contact stress damage of ceramics: Final report. [ZrO/sub 2/ coatings on Si/sub 3/N/sub 4/ and SiC against contact stress]
Technical Report
·
Sat Feb 28 23:00:00 EST 1987
·
OSTI ID:6545685
Interfacial chemistry-structure and fracture of ceramic composites
Conference
·
Thu Dec 31 23:00:00 EST 1987
·
OSTI ID:5484371
Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330100
36 MATERIALS SCIENCE
360203
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
CHEMICAL VAPOR DEPOSITION
COMPOSITE MATERIALS
CUTTING TOOLS
FRACTURE PROPERTIES
FRICTION
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LAYERS
MECHANICAL PROPERTIES
OXIDATION
PROGRESS REPORT
PROTECTIVE COATINGS
SILICON CARBIDES
SILICON NITRIDES
SURFACE COATING
TEMPERATURE RANGE 1000-4000 K
WEAR
ZIRCONIUM OXIDES
330100
36 MATERIALS SCIENCE
360203
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
CHEMICAL VAPOR DEPOSITION
COMPOSITE MATERIALS
CUTTING TOOLS
FRACTURE PROPERTIES
FRICTION
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LAYERS
MECHANICAL PROPERTIES
OXIDATION
PROGRESS REPORT
PROTECTIVE COATINGS
SILICON CARBIDES
SILICON NITRIDES
SURFACE COATING
TEMPERATURE RANGE 1000-4000 K
WEAR
ZIRCONIUM OXIDES