Hardness and fracture toughness of thermoelectric La3−x Te4
Source abstract
Abstract
Lanthanum telluride (La3−x Te4) is a state-of-the-art n-type high temperature thermoelectric material that behaves as a weak and brittle ceramic. Vickers microindentation hardness testing was explored as a rapid analysis technique to characterize the mechanical properties of this material. An indentation size effect was observed with hardness values ranging from 439 ± 31 kgf/mm2 (0.01 kgf/10 s contact time) to 335 ± 6 kgf/mm2 (0.5 kgf/10 s contact time). The Vickers indentation fracture toughness, K VIF, based on measurements of crack lengths emanating from the corners of the Vickers indents was 0.70 ± 0.06 MPa m1/2.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Intermetallics and Advanced Alloy Properties · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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