IMPROVED TRIBOLOGICAL PROPERTIES BY UTILIZING ELCTRICAL DISCHARGE MACHINE COATING WITH Hbn, CU & MoS2 USING GREEN COMPACT POWDER BLEND FOR SOLID LUBRICATION

Abstract

The electro-discharge machining (EDM) technique is one of the most efficient non-conventional machining methods in the current study for cutting extremely hard materials that are challenging to mill using standard machining techniques. In addition to the surface erosion that occurs during the EDM process, some tool material is also lost as a result of the operation's inherent nature. Electro discharge coating (EDC) was developed as a result of this nature's usage of the EDM process's properties. Ignition erect places tool material on the substrate surface in the EDC technique of surface modification. It functions according to the opposite polarity of EDM. A layer of disulphide of molybdenum, meahexagonal boron nitride(hbn)(hbn), and copper covering modifies the substrate's surface. With reverse polarity, an electrical discharge machine is used to deposit a coating layer over the substrate surface. The layer thickness was controlled by a number of variables, including peak current amplitude, powder blending ratio, and duty factor. The mixture was mixed for one and a half hours (1:30) hours in a mortar before being used to construct a compacted green electrode made of (hbn/Cu/MoS2) that was used to deposit the layer. After being put through a hot mounting press machine, the powdered mixture created a compacted green electrode with exact specifications. After the trials, a number of investigations were performed to look at the coated surface's morphology. The FESEM image displays the architecture of the coating layer with tiny gaps with a blending ratio of (hbn/Cu/MoS2) (30/40/30), a peak current of 5 ampere, and a 50% duty factor. Additional molecules found by X ray diffraction studies include MoS2, Hbn, and Cu molecules.