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Lecture

WEB Concentration-dependent electrical resistivity

Friday (25.09.2020)
11:50 - 12:05 F: Functional Materials, Surfaces, and Devices 1
Part of:


The concentration-dependent electrical resistivity across a wide range of solute concentrations in a Ti-Mo alloy was investigated using a combinatorial approach. Each of the samples consisted of a stack of pure titanium disc sandwiched in between two discs of pure molybdenum, hence forming multilayered geometry. The stacks were annealed at different temperatures and time using Spark Plasma Sintering process hence forming semi-infinite diffusion couples. The chemical concentration of each element within the interdiffusion region was measured using EPMA and phase evolution established using SEM and EBSD. Electrical resistivity of both the unreacted ends of the pure materials and the new phases developed within the interdiffusion region was measured using the 4-point method. The results showed that electrical resistivity increased with a decrease in the concentration of solute material (Mo). This phenomena was attributed to the high concentration of low-angle grain boundaries observed in the low impurity concentration region of the alloy.

Speaker:
Additional Authors:
  • Prof. Dr. David Rafaja
    TU Bergakademie Freiberg