Multilayer interface design for reliable brazing of C/C-SiC to stainless steel: Cr-driven interfacial control and stress redistribution
Harbin Institute of Technology · Pohang University of Science and Technology
Abstract
Reliable brazing of C/C-SiC composites to stainless steel is hindered by severe residual stresses and uncontrolled interfacial reactions. Here, we introduce a CuMnCr/Mo/Cu multilayer interface that aims to simultaneously regulates stress distribution and interfacial chemistry. Cr from the CuMnCr layer preferentially reacts with C/C-SiC, forming a Cr7C3 + Cr3Si reaction layer, while Fe and Cr from stainless steel diffuse into Cu to produce a (Cu, Fe, Cr) solid solution. The Mo interlayer mainly acts as both a diffusion barrier and a compliant stress absorber, isolating reaction zones and concentrating part of the residual stress within itself. Finite-element simulations confirm that this design reduces peak…
Citation impact
- FWCI
- 36.67
- Percentile
- 100%
- References
- 14
Authors
9Topics & keywords
- Brazing
- Residual stress
- Redistribution (election)
- Brittleness
- Stress (linguistics)
- Shear stress
- Joint (building)