Strain energy distribution in ceramic-to-metal joints

J. W. Park, P. F. Mendez, T. W. Eagar

Research output: Contribution to journalArticlepeer-review

149 Citations (Scopus)

Abstract

This work introduces a framework for evaluating the strength characteristics of ceramic-to-metal joints with multiple interlayers. Strain energy in the ceramic is used as a strength metric instead of maximum tensile stress. Based on the FEM analysis and order of magnitude scaling (OMS), simple analytical formulations between the strain energy and material properties are developed, which provide a guideline in designing multiple interlayers. Our analysis reveals the important role of multiple interlayers, which reduce the strain energy in the ceramic, increasing the strength of the joint. Based on the proposed design rule, Si3N4 to Inconel 718 joints have been brazed with single, double and triple interlayers and the joint strength was evaluated using a shear test. The experimental results support the design rules and confirm that strain energy is a good strength metric.

Original languageEnglish
Pages (from-to)883-899
Number of pages17
JournalActa Materialia
Volume50
Issue number5
DOIs
Publication statusPublished - 2002 Mar 14

Bibliographical note

Funding Information:
This research was funded under the United States DOE Award No. DE-FC26-99FT400054.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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