The onset of selective laser flash sintering in undoped and doped lanthanum chromite
Abstract
Previous studies have shown that selective laser flash sintering (SLFS) can be initiated in dielectrics that exhibit ionic or electronic conduction at high temperature. These materials required high laser powers to reach the temperatures where electrical conduction is sufficient to initiate SLFS. In this study, SLFS in lanthanum chromite (LC), an intrinsic electronic conductor with high conductivity, and lanthanum strontium chromite (LSC), which is doped to further increase electronic conductivity, were investigated with a focus on understanding the initiation mechanisms. Results show that the initiation of SLFS in LC and LSC occurs when electronic charge carriers are activated and flow to the electrode where the current is measured. A combination of carriers produced at the electrode, temperature‐activated intrinsic charge carriers, and extrinsic charge carriers present in LSC due to doping are responsible for the facile initiation of SLFS.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 11, 2023
- Source ID
- 10.1002/ces2.10189
Entities
People
- Deborah Hagen
- Desiderio Kovar
- Joseph J. Beaman
- Lezli Matto
Organizations
- Office of Naval Research
- University of Texas at Austin