Hardness and fracture toughness of thermoelectric La3−x Te4

Effect of Milling Time on the Microstructure and Thermoelectric Properties of P‐type TAGS‐90 Alloys by HEM and SPS

“…The average hardness value for SPSed samples is around Hv = 338 Kgf/mm 2 . In comparison with most other TE materials, TAGS is harder than Bi 2 Te 3 (63 Kgf/mm 2 ), PbTe (24 Kgf/mm 2 ), and Ag‐ and Sb‐doped PbTe (60–70 Kgf/mm 2 ), but it is slightly softer than the La 3‐x Te 4 (335–450 Kgf/mm 2 ) and the skutterudite compounds (250–550 Kgf/mm 2 ) . The significant increase in hardness values of these samples is possibly due to the influence of its high density and fine microstructure.…”

Tailoring the mechanical properties of thermoelectric lead telluride by alloying with non-doping calcium

“…Being highly doped semiconductors, thermoelectric materials are often very brittle and may show low fracture strengths. As a consequence, there have been some attempts in recent years to improve these mechanical properties in different classes of thermoelectric materials [7][8][9][10].…”

Microstructure and mechanical properties of thermoelectric nanostructured n-type silicon-germanium alloys synthesized employing spark plasma sintering

“…The elastic modulus (E) was determined from the slope of the unloading curve (dP/dh) and the depth of the contact circle (h c ) which is initial portion of this elastic unloading response at a maximum load (P max ), 18 24 and Skutterudites HV ¼ 2.45-5.4 GPa. 24 The observed value of E, of our samples, was in reasonable good agreement with those reported earlier, 10 as it is well known that for bulk alloys the E is primarily a material composition dependent property, although it does slightly depend on porosity and other defects. 25 Typical compressive stress-strain curve of nanostructured Si 80 Ge 20 alloy as shown in Fig.…”