Microstructural and electrical characterization of Joule heat welds in ultrathin Pt wires

作者：Tohmyoh Hironori^*; Fujimori Masato

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2012, 46: 33-37.

DOI：10.1016/j.physe.2012.09.003

This paper reports on the structural and electrical characteristics of Joule heat welds in ultrathin Pt wires with diameters of 600-800 nm. The wires have a bamboo structure where the crystal grains are aligned only in the axial direction. They were welded together in a self-completed manner in air by Joule heating. The electrical resistance of the welded wire system was measured using a potential drop technique. It was found by transmission electron microscope observations that the region affected by welding was very narrow and it appeared that a new grain boundary had been created in this region. Moreover, the welds were found to have good electrical characteristics and the electrical resistance at the weld depended on its cross-sectional area.

• 出版日期2012-9