Quantum mechanics

Electrical resistivity and conductivity

Engineering

Metallurgy

Materials science

Chromatography

Physical chemistry

Shielding effect

Physics

Microstructure

Electromagnetic shielding

Conductivity

Composite material

Analytical Chemistry (journal)

Chemistry

Electrical engineering

Journal of Material Science and Technology

Microstructure, electrical conductivity, and electromagnetic interference (EMI) shielding effectiveness (SE) of cast Mg-xZn-yY (x = 2–5, y = 1–10) alloys were systematically investigated to understand the effects of Zn and Y additions on electrical conductivity and electromagnetic shielding effectiveness of the alloys. Experimental results indicate that the electrical conductivity and SE of the Mg-xZn-yY alloys decrease with Y/Zn ratio. Electrical conductivity is the main factor that affects the electromagnetic shielding properties and the variation tendency of electromagnetic shielding properties of the Mg-xZn-yY alloys is consistent with conductivity. Valence of Y and Zn atoms, configuration of extranuclear electron and volumetric difference are main reasons for the variations in the electrical conductivity. A high density of second phase and the formation of semi-continuous network structure can also improve the SE value at high frequencies.

Effects of Y and Zn additions on electrical conductivity and electromagnetic shielding effectiveness of Mg-Y-Zn alloys