Analytical and experimental evaluation of joining silicon nitride to metal and silicon carbide to metal for advanced heat engine applications

Technical Report · Sun Apr 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6767279· OSTI ID:6767279

Kang, S; Selverian, J H; Kim, H; O'Niel, D; Kim, K ^[1]

---

1. GTE Labs., Inc., Waltham, MA (USA)

This report summarizes the results of Phase I of Analytical and Experimental Evaluation of Joining Silicon Nitride to Metal and Silicon Carbide 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 and 950{degree}C applications. Failure criteria were derived to predict the fracture of the braze and ceramic. Extensive finite element analyses (FEA), using ABAQUS code, 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. Finally, the FEA results were compared with experiments using an idealized strength relationship. The results showed that the measured strength of the joint reached 30--90% of the strength by predicted by FEA. Overall results demonstrated that FEA is an effective tool for designing the geometries of ceramic-metal joints and that joining by brazing is a relevant method for advanced heat engine applications. 33 refs., 54 figs., 36 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA); GTE Labs., Inc., Waltham, MA (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6767279
• Report Number(s): ORNL/Sub-87-SB047C/1; ON: DE91000535
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330603 -- Vehicle Design Factors-- Engine System
36 MATERIALS SCIENCE
360200* -- Ceramics
Cermets
& Refractories
CARBIDES
CARBON COMPOUNDS
CERAMICS
COATINGS
DOCUMENT TYPES
ELEMENTS
ENGINES
FABRICATION
HEAT ENGINES
JOINING
METALS
NITRIDES
NITROGEN COMPOUNDS
PERFORMANCE TESTING
PNICTIDES
PROGRESS REPORT
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
TESTING