The effect of substrate temperature on the critical velocity in microparticle impact bonding
Abstract
A number of nascent coating and micromanufacturing processes involve particles sprayed at a high velocity, which impact a substrate, deform, and adhere. Successful bonding between the particles and the substrate requires impact velocities higher than the so-called critical adhesion velocity. This critical velocity is influenced by the temperature of the substrate, a variable that we isolate in this work by conducting single-particle impacts on a variable-temperature substrate for three systems (Al–Al, Sn–Sn, and Ti–Ti) with particles individually selected within a narrow size distribution. Our results quantitatively connect the increase in substrate temperature to a significant lowering of the critical velocity, which we attribute to the lower dynamic strength of the thermally softened substrate. The data are generally consistent with expectations for bonding being controlled by a hydrodynamic process of jetting upon impact.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 05, 2021
- Source ID
- 10.1063/5.0055274
Entities
People
- Christopher A. Schuh
- D Veysset
- Ievgeniia Chaban
- Keith A. Nelson
- Yuchen Sun
Organizations
- Massachusetts Institute of Technology
- Office of Naval Research
- United States Department of Energy