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- W2622787798 abstract "Samples belonging to the series Sm(y)(Fe(x)Ni(1−x)₄Sb₁₂ were heated in Ar atmosphere up to 400 °C and cooled down to room temperature several times, with the aim to evaluate the effect of thermal cycles on microhardness. The treatment temperature was chosen in correspondence of the maximum ZT value, in order to simulate the operating conditions of the material in a thermoelectric device. Vickers measurements allowed to detect the effect of both composition and thermal treatments on the microhardness properties of the material. A decrease in the microhardness value was observed prior to thermal treatments with increasing Fe amount, due to the substitution of Ni by the larger Fe atom. Moreover, almost all compositions show an increase in the hardness of the skutterudite phase as a consequence of thermal cycles, accounting for the Sb enrichment of skutterudite. This evidence suggests also a possible improvement of the preparation procedure in order to obtain a stoichiometric Sb amount within the skutterudite. Samples were prepared by direct reaction of pure elements at 950 °C followed by thermal treatment at 620 °C. The composition and microstructure of the obtained samples were investigated by X-ray powder diffraction, and by optical and electronic microscopy." @default.
- W2622787798 created "2017-06-15" @default.
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- W2622787798 date "2017-03-01" @default.
- W2622787798 modified "2023-09-26" @default.
- W2622787798 title "Influence of Composition and Thermal Treatments on Microhardness of the Filled Skutterudite Sm<sub>y</sub> (Fe<sub>x</sub> Ni<sub>1−x</sub>)<sub>4</sub>Sb<sub>12</sub>" @default.
- W2622787798 doi "https://doi.org/10.1166/jnn.2017.13718" @default.
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