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Effect of localized temperature development at flaw tips on the degradation of Na-β/β″-alumina

Authors
Journal
Solid State Ionics
0167-2738
Publisher
Elsevier
Publication Date
Volume
37
Issue
4
Identifiers
DOI: 10.1016/0167-2738(90)90187-v

Abstract

Abstract The influence of increased temperature at the notch tips of magnesia stabilized sodium β/β′'-alumina bars during sodium-ion electrolysis was investigated using a galvanostatic/galvanostatic-interrupter technique. Fracture toughness measurements and microscopy after electrolysis indicated large crack growth and sodium dendrite formation during electrolysis. Significant temperature gradients were detected local to the flaw tip during electrolysis.

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