Topic
Liquid dielectric
About: Liquid dielectric is a research topic. Over the lifetime, 3702 publications have been published within this topic receiving 45150 citations.
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TL;DR: Spark erosion is a method for producing fine powders of metals, alloys, semiconductors, and compounds as discussed by the authors, which involves maintaining repetitive spark discharges among chunks of material immersed in a dielectric liquid.
Abstract: Spark erosion is a method for producing fine powders of metals, alloys, semiconductors, and compounds. The technique involves maintaining repetitive spark discharges among chunks of material immersed in a dielectric liquid. As a result of the spark discharge there is highly localized melting or vaporization of the material. The powders are produced by the freezing of the molten droplets or the condensation and freezing of the vapor in the dielectric liquid. Since the powders are quenched in situ, they may be extremely rapidly cooled. Particles can be produced in sizes ranging from 5 nm to 75 μm. The average powder size and production rate depend on the power parameters, material used, and the dielectric liquid.
128 citations
TL;DR: In this article, the effects of a capacitor connected parallel to the gap were investigated in relation to the recast layer formation, and transverse section pictures showed the morphology and the depth of the thermal influenced zone.
124 citations
01 Jan 1981
TL;DR: In this paper, the experimental and theoretical investigations to determine the effect of impurities in dielectric liquid on the electric discharge machining performance were summarized. But the experimental results were limited.
Abstract: This paper summarizes the experimental and theoretical investigations to determine the effect of impurities in dielectric liquid on the Electric Discharge Machining performance.
123 citations
TL;DR: In this paper, the potential well distribution of surface and saturation charges on conductive and dielectric NPs is analyzed and compared with those of pure oil-based NPs.
Abstract: The mechanisms by which conductive and dielectric nanoparticles (NPs) trap electrons are explained by the potential well distribution caused by induced or polarized charges on NPs. Thus, the distributions of surface and saturation charges on conductive and dielectric NPs are determined. Given conductive Fe3O4, semiconductive TiO2, and dielectric Al2O3 NPs, insulation performance tests are conducted and ionization models of nanofluids (NFs) based on transformer oil are developed. These models are compared with those of NFs based on pure oil. The NP whose conductivity or permittivity does not match that of the dielectric liquid has a potential well and an increased amount of saturation charges on its interface. This NP influences streamer development strongly and enhances the breakdown of oilbased NF.
123 citations
TL;DR: In this paper, the machining characteristics of AISI D5 tool steel in wire electrical discharge machining process were investigated and it was found that the intensity of the process energy does affect the amount of recast and surface roughness as well as microcracking, the wire speed and dielectric fluid pressure not seeming to have much of an influence.
122 citations