We report a flexible, ultrathin, and compact poly­(vinylidene fluoride)-based self-polarized piezoelectric nanogenerator via an expeditious quenching approach of the active layer. The appearance of the β phase of PVDF after quenching resulted in its applicability in energy harvesting. The employed organic solvents during the fabrication process contributed to the observance of the β phase, which is confirmed by X-ray diffraction and Fourier transform infrared spectroscopy. A two-step approach fabrication of the PVDF device showed exceptional performance, resulting in an open-circuit peak-to-peak voltage of 19.2 V upon human hand pressing and short-circuit current >0.7 μA. Also, the average d 33 value for the quenched PVDF film is observed to be −15.16 ± 5.81 pm/V. Further, charging of a capacitor and powering the liquid crystal displays (LCDs) are realized through the nanogenerator, thus validating mechanical energy conversion, storage, and powering applications.

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Electro discharge machining is one of the crucial non-traditional machining processes which widely used for arduous materials and for that material that could not be possible to machine with standard machining procedures such as composites along with inter-metallic products. EDM functions within the ignite erosion approach identical to having an electrical short which burns up a small hole inside the metal which come in contact. In EDM method both perform portion substance and the electrode substance must be conductors involving energy that is electricity. Complicated single profiles utilized in prosthetics, bio-medical purposes may be done with EDM. Likewise Electro Discharge Machining (EDM) involves in production of complicated shapes, micro openings along with substantial reliability in numerous electrically conductive products along with high-durability temperature-resistant components. In this paper investigated the optimization of process parameter of EDM machine to get the maximum MRR and minimum TWR. The aim of this paper to study the performance of electrodes of Copper Brass and Aluminium on D2 (Hot die steel) with EDM process.