Work

Effect of Copper Addition on Mechanical Properties of Nanostructured Pb1-xCuxTe Thermoelectric Alloy Systems by Nanoindentation

Year: 2017

Type: article

Abstract: The mechanical properties of sintered nanostructured Pb1-xCuxTe (0 ≤ x ≤ 0.2) alloy systems were investigated using nanoindentation technique. The powder precursors of the designed systems were prepared by ball milling technique and sintered by hot isostatic pressing. Cu acts as a dopant in these alloy systems, and an increase in its concentration, up to x = 0.1, leads to a more dense and refined nanostructure along with enhancements in both hardness and Young’s modulus. The Cu addition caused an apparent embrittlement in the materials, and spalling of the materials was recognized when x exceeded 0.15. These results imply that design parameters of complex mechanical environments under thermal shocks and vibrations cannot be determined only in terms of hardness and Young’s modulus of thermoelectric systems like Pb1-xCuxTe alloys.

Source: Key engineering materials

DOI: 10.4028/www.scientific.net/kem.735.205

Authors: Mohamed Abd El Naser Mansour, Ahmed Abd El-Moneim, Koichi Nakamura

Institution: Egypt-Japan University of Science and Technology

Language: English

Topic: Advanced Thermoelectric Materials and Devices

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Funder: Japan Society for the Promotion of Science

Award: Development of simulation method on thermoelectric properties and survey of novel thermoelectric materials based on first-principles electronic-state calculation