Abstract
Ag nanopastes composed of Ag nanoparticles or Ag nanowires and Cu-Ag nanopastes with Cu-Ag core-shell nanowires are used as a new brazing material for Inconel® 718. Ag nanoparticles or Ag nanowires are further added to the core-shell paste to adjust to a eutectic composition. Microstructural analysis of the brazed joints was carried out with EDS and XRD. High bonding strength (>100 MPa) was obtained with both Ag and Cu-Ag nanopastes. It was concluded that the Cu-Ag nanopastes form stronger braze joints than the BAg-8 brazing alloy as a result of Hall-Petch strengthening. It has also been concluded that the addition Ag nanoparticles or Ag nanowires to the Cu-Ag core-shell nanowire paste have a significant impact on the bonding strength and fracture of the Cu-Ag joints.
| Original language | English |
|---|---|
| Pages (from-to) | 313-324 |
| Number of pages | 12 |
| Journal | Journal of Materials Processing Technology |
| Volume | 249 |
| DOIs | |
| State | Published - Nov 2017 |
Funding
This project is jointly supported by Institute of Public Service, University of Tennessee through I'UCRC project of National Science Foundation and a seed grant from Oak Ridge National Laboratory, Department of Energy, USA. Chris Wetteland and Maneel Bharadwaj assisted in the collection of EDS and microhardness measurements. John Dunlap, Maulik Patel, and the Joint Institute of Advanced Materials permitted use of their electron microscopy facilities and X-ray diffraction equipment provided the training needed to operate those devices.
| Funders | Funder number |
|---|---|
| Institute of Public Service | |
| National Science Foundation | |
| U.S. Department of Energy | |
| Oak Ridge National Laboratory | |
| University of Tennessee |
Keywords
- Brazing
- Core-shell
- Inconel
- Laser
- Nanojoining
- Nanopaste