In present exploration, Electric Discharge Alloying/Coating (EDA/C) is made over duplex stainless steel as alloying elements of nickel, graphite, copper (electrode) and pyrolysis carbon from oil together with substrate material results in metal matrix composite coating. Coating possess average hardness value of 1018 HV 0.5 four times higher and lowered specific wear rate of 1.18 × 10⁻⁵ mm³/N m with an improved average friction coefficient of 0.3 through Pin on Disc (POD) wear tester. Metallurgical properties of the coating are analysed through surface topography by 3D optical profilometer, coating microstructure over and across with elemental distribution are identified by electron microscope (SEM) attached with Energy-Dispersive X-Ray Spectroscopy (EDS). Phase transform from δ and γ of cementite with meta stable iron carbide appeared as austenitic structure are identified through Electron Probe Micro Analyser (EPMA) and by X-ray diffraction. This meta stable carbides together with alloying elements provides improved tensile and bonding strength at room temperature were else copper controls further phase transformation. Copper shows stick slip at lower loading up to 40 N then restores in temperature arises during frictional contacts makes carbon and carbide to plasticity state under room temperature provides self-lubricant properties.

在目前的探索中，放电合金/涂层（EDA/C）是在双相不锈钢上作为镍、石墨、铜（电极）和油中热解碳的合金元素与基材一起制成金属基复合涂层。涂层的平均硬度值是 1018 HV 0.5 的四倍，比磨损率降低了 1.18 × 10 ^-5  mm ³/N m 通过销钉 (POD) 磨损测试仪将平均摩擦系数提高到 0.3。涂层的冶金性能通过 3D 光学轮廓仪通过表面形貌分析，涂层微观结构与元素分布通过电子显微镜 (SEM) 识别，并附有能量色散 X 射线光谱 (EDS)。通过电子探针显微分析仪 (EPMA) 和 X 射线衍射鉴定出具有亚稳定碳化铁的渗碳体的 δ 和 γ 相变，表现为奥氏体结构。这种亚稳定碳化物与合金元素一起在室温下提供了改进的拉伸和结合强度，否则铜会控制进一步的相变。