Morphology, structure, and mechanical properties of the surface of PbTe crystals after etching with H2O2–HBr–ethylene glycol solutions

Enhanced Mechanical Properties of Na0.02Pb0.98Te/MoTe2 Thermoelectric Composites Through in-Situ-Formed MoTe2

“…For example, the Young’s modulus E , shear modulus G , and bulk modulus B of the pristine matrix sample, Na 0.02 Pb 0.98 Te, are 48.86, 23.66, and 17.41 GPa, respectively, while those of the Na 0.02 Pb 0.98 Te-0.5%MoTe 2 sample are 56.2, 27.28, and 19.63 GPa, respectively, which are 15, 15.3, and 14.5% higher than those of the pristine sample. The elastic modulus is an important physical parameter of engineering materials and demonstrates the ability of the materials to resist elastic deformation. − The improvements of the Young’s modulus E , the shear modulus G , and the bulk modulus B upon incorporating MoTe 2 indicate that Na 0.02 Pb 0.98 Te/MoTe 2 composites are better at resisting elastic deformations, which is ascribed to the presence of MoTe 2 and the interface between MoTe 2 and the matrix because the composition of the matrix is unchanged regardless of whether MoTe 2 is incorporated. Practically, the enhanced elastic modulus is also revealed as the increase in the slope in the strength–displacement curve shown in Figure S3 upon incorporating MoTe 2 .…”