| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nano and Micro Additive Manufacturing
|
| Presentation Title |
Room Temperature Micro Cold Spray of Ceramic Thick Films |
| Author(s) |
Desiderio Kovar |
| On-Site Speaker (Planned) |
Desiderio Kovar |
| Abstract Scope |
The micro cold spray process (MCS) is capable of depositing thick films of ceramics at room temperature. Films are formed by impacting solid sub-micron to micron-scale particles at high enough velocities that they deform, stick and form dense films. A particular challenge is determining the required impact velocities for film formation; particles impacting below a critical velocity bounce off the substrate without sticking and excessive particle velocities result in particle fracture or erosion rather than film formation. Studying deformation mechanisms in situ using experiments is not possible because of the extremely short impact times and fine particle sizes used in MCS. We demonstrate that molecular dynamics simulations can be used to study deformation mechanisms under conditions relevant to MCS. Results show that pressure-induced phase transformations, dislocation initiation and propagation, and amorphization and viscous flow are responsible for deformation. Comparisons between predictions from simulations and deposited films will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Ceramics, Computational Materials Science & Engineering |