Adhesion strength of titanium particles to alumina substrates: A combined cold spray and LIPIT study
Name
Adhesionstrengthoftitaniumparticlestoaluminasubstrates-preproduction.pdf
Description
Accepted version
Size
1.16 MB
Format
Adobe PDF
Checksum (MD5)
9de49a711dd8fe0f8678a85ff47f8125
Author(s)
Imbriglio, SI
Hassani-Gangaraj, M
Veysset, D
Aghasibeig, M
Gauvin, R
Nelson, KA
Schuh, CA
Chromik, RR
Date Issued
2019
Journal
Surface and Coatings Technology
Publisher
Elsevier BV
Version
Author's final manuscript
Abstract
© 2019 The cold spray process and laser-induced projectile impact test (LIPIT) are used to deposit Ti powder particles on sintered polycrystalline Al 2 O 3 . Whereas LIPIT allows real-time observations of single particle impact and measurement of particle impact velocity, cold spray rapidly and simultaneously deposits particles with a wide range of deposition velocities and sizes. By use of these two techniques, the effect of particle velocity and substrate morphology on adhesion strength of single splats is investigated. The critical velocity for deposition is identified to be approximately 580 m/s for the Ti/Al 2 O 3 system when using LIPIT and particles of 10 μm. Above the critical velocity, flattening ratio (FR) is also evaluated and observed to be linearly dependent on the particle impact velocity. Splat adhesion testing is performed on LIPIT-deposited as well as on cold spray-deposited powder particles to measure adhesion strength. This analysis shows that adhesion strength is highly affected by local substrate surface morphology, where particles bond more weakly to relatively smooth portions of the substrate. Therefore, mechanical bonding plays a significant role in adhesion. Also, adhesion strength decreases with an increase in FR and therefore velocity. This decrease can be associated with fracture of the ceramic substrate and rebound forces.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.SURFCOAT.2019.01.071
