Affiliation:
1. Materials Science and Engineering Program University of Texas at Austin Austin Texas USA
2. Department of Mechanical Engineering University of Texas at Austin Austin Texas USA
3. Center for Additive Manufacturing and Design Innovation University of Texas at Austin Austin Texas USA
Abstract
AbstractPrevious 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.
Subject
Electronic, Optical and Magnetic Materials,Ceramics and Composites,Biomaterials,Materials Science (miscellaneous)