Analytical and experimental evaluation of joining silicon nitride to metal and silicon carbide to metal for advanced heat engine applications. Final report
- GTE Labs., Inc., Waltham, MA (US)
- Brown Univ., Providence, RI (US). Div. of Engineering
This report summarizes the results of Phase 2 of Analytical and Experimental Evaluation of Joining Silicon Nitride to Metal and Silicon Carbide to Metal for Advanced Heat Engine Applications. A general methodology was developed to optimize the joint geometry and material systems for 650{degrees}C applications. Failure criteria were derived to predict the fracture of the braze and ceramic. Extensive finite element analyses (FEA) were performed to examine various joint geometries and to evaluate the affect of different interlayers on the residual stress state. Also, material systems composed of coating materials, interlayers, and braze alloys were developed for the program based on the chemical stability and strength of the joints during processing, and service. The FEA results were compared with experiments using two methods: (1) an idealized strength relationship of the ceramic, and (2) a probabilistic analysis of the ceramic strength (NASA CARES). The results showed that the measured strength of the joint reached 30--80% of the strength predicted by FEA. Also, potential high-temperature braze alloys were developed and evaluated for the high-temperature application of ceramic-metal joints. 38 tabs, 29 figs, 20 refs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); GTE Labs., Inc., Waltham, MA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10176461
- Report Number(s):
- ORNL/Sub-90-SB047/2; ON: DE93018128; TRN: 93:002864
- Resource Relation:
- Other Information: PBD: May 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
HEAT ENGINES
BRAZED JOINTS
SILICON NITRIDES
JOINING
SILICON CARBIDES
METALS
PERFORMANCE TESTING
PROGRESS REPORT
RESIDUAL STRESSES
MECHANICAL PROPERTIES
FINITE ELEMENT METHOD
FAILURE MODE ANALYSIS
C CODES
MICROSTRUCTURE
PHYSICAL PROPERTIES
COATINGS
360200
360201
330000
CERAMICS, CERMETS, AND REFRACTORIES
PREPARATION AND FABRICATION
ADVANCED PROPULSION SYSTEMS