Hybrid Flash-SPS of TiNiCu0.05Sn with reduced thermal conductivity

Abstract

TiNiCu 0.05 Sn was sintered using Spark Plasma Sintering (SPS) and a new derivative processing method, hybrid Flash-SPS (hFSPS). The high heating rate achieved (7700 °C/min) produced almost single-phase samples with high density. The sample sintered at 1040 °C showed a higher power factor and a lower thermal conductivity than the SPS sample, resulting in a higher ZT at 350 °C HighlightsView publication stats View publication stats

Tailoring the thermoelectric and structural properties of Cu–Sn based thiospinel compounds [CuM1+xSn1−xS4 (M = Ti, V, Cr, Co)]

“…The presence of the abnormal grain growth gives evidence of high local rates of interface migration during the sintering process and potential liquid phase formation at the grain boundaries. [68][69][70] In the present study, the long step during SPS (30 min) can be a factor for promoting grain growth. The relatively poor mechanical properties observed in these samples can be attributed to the hardness reduction induced by a decrease of the Hall-Petch strengthening.…”

Physical Insights on the Lattice Softening Driven Mid‐Temperature Range Thermoelectrics of Ti/Zr‐Inserted SnTe—An Outlook Beyond the Horizons of Conventional Phonon Scattering and Excavation of Heikes’ Equation for Estimating Carrier Properties

“…[9][10][11][12][13][14][15][16][17][18] The thermal conductivity is known to be suppressed by nanostructuring, rattling impurities, phonon mode softening, resonant bonding, and so forth. [10,[19][20][21][22][23][24][25] The lead-free IV-VI chalcogenide semiconductor, SnTe with the same rock-salt crystal structure as PbTe and with better mechanical properties, is considered a viable eco-friendly option for thermoelectrics. [26] However, the pristine SnTe has its drawbacks with regards to its usage as a thermoelectric material such as high charge carrier concentration (≈10 21 cm -3 ) due to the intrinsic nature of SnTe to have high Sn vacancies, small bandgap often leading to bipolar conduction, and the large energy separation between the two valence band maxima (≈0.35 eV), all of which leads to a low S and high κ e , thus ultimately lower zT in pristine stochiometric SnTe.…”

“…[ 9–18 ] The thermal conductivity is known to be suppressed by nanostructuring, rattling impurities, phonon mode softening, resonant bonding, and so forth. [ 10,19–25 ]…”

Improvement in the thermoelectric properties of porous networked Al-doped ZnO nanostructured materials synthesized via an alternative interfacial reaction and low-pressure SPS processing

“…Such similar phenomena have been found in other outof-equilibrium processes such as chemical vapor synthesis (CVS) 44 and hybrid flash-SPS processing. [77][78][79] The peak broadening along (100) reflection with the increase in Al-concentration, as depicted in Fig. 2(b) and Fig.…”