Elastic modulus, biaxial fracture strength, electrical and thermal transport properties of thermally fatigued hot pressed LAST and LASTT thermoelectric materials

Analysis of the Influence of Thermal Treatment on the Stability of Ag1−xSb1+xTe2+x and Se-Doped AgSbTe2

“…The AgSbTe 2 alloys with GeTe (so called TAGS) with a maximum value of ZT max = 1.5 at 750 K were considered the best thermoelectric materials for quite a long time. 5 The PbTe alloys with AgSbTe 2 feature ZT max = 2.2 at 800 K, which is one of the highest reported figures of merit for bulk thermoelectric materials. 6 However, the application of those alloys seems to be limited as, due to their thermodynamic instability and inhomogeneity, they lose their excellent thermoelectric properties during longterm annealing at high temperatures.…”

Mechanical Response of Thermoelectric Materials

“…The literature provides a wealth of elastic property measurements involving TEMats [1,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], and a listing of those measurements is provided in Appendix A for Ca 3 CoO 4 , half-Heuslers, LAST and PbTe, skutterudites, and Zn 4 Sb 3 , along with information on the test method used for the measurement.…”

Nondestructive Evaluation of Early Contact Fatigue Using Eddy Current Pulsed Thermography

“…, and can be written for the derivatives in the following equation (6). (6) As the fatigue damage occurs at the area that suffers contact fatigue, the thermal and electrical conductivities of samples are varied [37][38][39]. Thus, both the spatial and transient of heat distribution is non-uniform at these areas.…”

“…During the fatigue process, the microstructure of the gear is changed. These changes lead to a considerable decrease in thermal conductivity, electrical conductivity and magnetic permeability [37][38][39]. The relationship between the heat distribution and these parameters can be established by using the pulsed eddy current thermography method.…”