Abstract
The effects of the liquid phase of a metal binder on the microstructure and properties of self-diffusion gradient composite (Cu - Al – ZnO) were investigated. For the compositions considered, it was revealed that at the temperature of about 550 °C, a liquid phase binder forms from nanoparticles Cu – Al. Applying a proper amount of a (Cu – Al) binder appeared to be beneficial for fabricating gradient composites with the desired self-diffusion process. It is also favorable for mass transfer of additives nanoparticles into the volume of a matrix during sintering and for the desired fine microstructure and mechanical properties. For the experimental conditions considered in this study, the best mechanical properties can be obtained when 6 mass % (Cu – Al) of ligature were used, which gave hardness HB at 120, electroerosion wear – 0.092 • 10-6 g / cycle, resistivity – 0.025 mcOm.
Highlights
Analysis of accumulated information on basic physical - mechanical and exploitation properties of the electric contact materials shows that they are subjected to a variety of often conflicting requirements
Microstructures were studied by electron microscopy and energy dispersive microanalysis using the X-ray (CXR) by means of the microscope “JEOL JSM 6490LV, JEOL JSM 7001F” with the system microanalyzers “Oxford Instruments”, “HITACHI TM 1000” and an optical microscope “ZEISS Observer Z1m”
On the base of Divnogorsk Plant of low-voltage equipment (DZNVA), electrical contacts were tested in terms of hardness, electrical resistivity, electroerosive wear
Summary
This content has been downloaded from IOPscience. Ser. 803 012050 (http://iopscience.iop.org/1742-6596/803/1/012050) View the table of contents for this issue, or go to the journal homepage for more. You may be interested in: Increase in composite binder activity R Fediuk, A Smoliakov and N Stoyushko Development a Cu-based Metal Powder for Selective Laser Micro Sintering C Dai, H H Zhu, L D Ke et al Green Alternative binders for high-voltage electrochemical capacitors V. Chernysh et al Transient liquid-phase sintering using silver and tin powder mixture for die bonding Masahisa Fujino, Hirozumi Narusawa, Yuzuru Kuramochi et al Composite binders for concrete with reduced permeability R Fediuk and A Yushin Microstructural evolution during solid-state sintering of ball-milled nanocomposite WC–10mass% Co powders E Menéndez, J Sort, A Concustell et al Fabrication of -tricalcium phosphate composite ceramic sphere-based scaffolds with hierarchical pore structure for bone regeneration Fupo He, Guowen Qian, Weiwei Ren et al Inkjet printable nanosilver suspensions for enhanced sintering quality in rapidmanufacturing John G Bai, Kevin D Creehan and Howard A Kuhn
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