Prediction of adhesive strength, deposition efficiecny and wear behaviour of plasma spray coating of low grade mineral on mild steel and copper Substrate by soft computing technique ud

摘要

Currently emerging technologies contains some of the most prominent ongoing advances, udinnovations and developments in a variety of engineering field to advance surface property by udusing modern technology. Because for higher productivity and efficiency across the entire udspectrum of manufacturing and engineering industries has ensured that most modern day udcomponents/ parts are subjected to day by day increasing harsh environments in routine udoperations. All the Critical industrial components of the machines are, therefore, prone to more udrapid degradation as the parts fail to withstand the aggressive operating conditions and this has udbeen affecting the industry’s economy to a very high extent. The prime objectives are to develop udessential surface properties with an economical process. Today the investigation explores the udcoating potential of industrial wastes. Fly-ash emerges as a major waste from thermal power udplants. It mainly comprises of oxides of iron, aluminium, titanium and silicon along with some udother minor constituents. Fly-ash premixed with illmenite and quartz which are minerals of low udcost available in plenty are excellent for providing protection against resistant to erosion and udabrasive wear. udIn this wide research world Plasma spraying is gaining acceptance for development of quality udcoatings of various materials on a wide range of substrates. Use of the industrial wastes of such udkind as coating material minimizes the plasma spray coating deposition cost, which posed to be udthe major obstacle to the wide spread purpose due to high cost of the spray grade powders. udFly-ash+quartz+illmenite (weight percentage ratio: 55:25:20) is deposited on copper and mild udsteel substrates by atmospheric plasma spraying, at operating power levels ranging from ud10 to 20kW and after that characterization of the coatings is carried out. The properties/ quality udof the coatings depend on the operating condition, process parameters and materials used. The udplasma spraying process is controlled by interdependent parameter, co-relations and individual udeffect on coating characteristics. The size of the particles of raw material used for coating is udcharacterized using Malvern Instruments a Laser particle size analyzer. Coating interface udadhesion strength is calculated using a method of coating pull, confirming to ASTM C-633 udstandard. Deposition efficiency is a key factor that determines the techno economics of the udprocess, evaluated for the deposited coatings. Coating thickness of the polished cross section is udmeasured, using an optical microscope.