Joining SI3N4 for Advanced Turbomachinery Applications

GLASS, S. JILL ; LOEHMAN, RONALD E. ; HOSKING, F. MICHAEL ; STEPHENS JR., JOHN J. ; VIANCO, PAUL T. ; NEILSEN, MICHAEL K. ; WALKER, CHARLES A. ; POLLINGER, J.P. ; MAHONEY, F.M. ; QUILLEN, B.G.

Sandia National Laboratories

关键词: Joining;    Mechanical Properties;    36 Materials Science;    Silicon Nitrides;    Joints;   

DOI  :  10.2172/760738
RP-ID  :  SAND2000-1559
RP-ID  :  AC04-94AL85000
RP-ID  :  760738

美国|英语

来源: UNT Digital Library

【 摘 要 】

The main objective of this project was to develop reliable, low-cost techniques for joining silicon nitride (Si{sub 3}N{sub 4}) to itself and to metals. For Si{sub 3}N{sub 4} to be widely used in advanced turbomachinery applications, joining techniques must be developed that are reliable, cost-effective, and manufacturable. This project addressed those needs by developing and testing two Si{sub 3}N{sub 4} joining systems; oxynitride glass joining materials and high temperature braze alloys. Extensive measurements were also made of the mechanical properties and oxidation resistance of the braze materials. Finite element models were used to predict the magnitudes and positions of the stresses in the ceramic regions of ceramic-to-metal joints sleeve and butt joints, similar to the geometries used for stator assemblies.