In-situ observations of single micro-particle impact bonding
Author(s)
Hassani Gangaraj, Seyyed Mostafa
Veysset, David Georges
Nelson, Keith Adam
Schuh, Christopher A
Date Issued
March 2018
Journal
Scripta Materialia
Publisher
Elsevier BV
Citation
Hassani-Gangaraj, Mostafa et al. "In-situ observations of single micro-particle impact bonding." Scripta Materialia, 145 (March 2018): 9-13 © 2017 Acta Materialia Inc.
Version
Author's final manuscript
Abstract
We study supersonic impact of individual metallic microparticles on metallic substrates, that is, the unit process of materials buildup in cold spray coatings/additive manufacturing. We resolve the moment of impact bonding through real-time observations of single particle impacts with micron-scale and nanosecond-level resolution. We offer the first in-situ observation of a material-dependent threshold velocity, above which the particle undergoes an impact-induced jet-like material ejection and adheres to the substrate. We report direct measurements of critical velocities for structural metals, which unlike in nozzle experiments, are not affected by process-related complexities obscuring particles' kinetic and thermal histories. Keyword: Cold spray; Adhesion; Additive manufacturing; Impact
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.scriptamat.2017.09.042
