Title :
Microstructure and arc erosion characteristics of Ag/Ni contacts by mechanical alloying
Author :
Luo, Qunfang ; Wang, Yaping ; Ding, Bingjun
Author_Institution :
Institue of Metal Res., Chinese Acad. of Sci., Shenyang, China
Abstract :
Ag70/Ni30 contact alloy is prepared by the process of mechanical alloying and subsequent hot pressing. Results detected by X-ray diffraction and transmission electronic microscope indicate that this alloy is a mixture of "huge" Ag-rich matrix and micro-scaled or nanocrystalline Ni-rich particles. The fine particles strengthen alloy mechanically and their uniform dispersion also improve arc erosion morphology to a large extend, compared with situation of traditional materials prepared through power metallurgy technique.
Keywords :
X-ray diffraction; electrical contacts; hot pressing; mechanical alloying; nanoparticles; nickel alloys; silver alloys; solders; transmission electron microscopes; Ag-Ni; Ag/Ni contacts; Ag70/Ni30 contact alloy; X-ray diffraction; arc erosion characteristics; arc erosion morphology; fine particles; hot pressing; mechanical alloying; microscaled particles; nanocrystalline Ni-rich particles; power metallurgy technique; transmission electronic microscope; Alloying; Electrodes; Grain size; Microstructure; Nickel alloys; Powders; Pressing; Transmission electron microscopy; Welding; X-ray diffraction; AgNi; X-ray diffraction (XRD); contact alloy; hot pressping (HP); mechanical alloying (MA);
Journal_Title :
Components and Packaging Technologies, IEEE Transactions on
DOI :
10.1109/TCAPT.2005.859668
