The onset of selective laser flash sintering in undoped and doped lanthanum chromite

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...

Full description

Saved in:
Bibliographic Details
Published in:International journal of ceramic engineering & science 2023-11, Vol.5 (6), p.n/a
Main Authors: Matto, Lezli, Hagen, Deborah, Beaman, Joseph J., Kovar, Desiderio
Format: Article
Language:English
Subjects:
Additive manufacturing
Chromite
Conduction heating
Conductivity
Current carriers
Electric fields
Electrical conduction
Electrodes
field-assisted sintering technology
flash sintering
Grain boundaries
High temperature
Lanthanum
Lasers
MATERIALS SCIENCE
Resistance sintering
sinter/sintering
Sintering
Stainless steel
Temperature
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2578-3270
2578-3270
DOI:10.1002/ces2.10189