Slurry spray technique (SST) could be bethought as an allied thermal spray coating method; wherein, the coating ingredients are subjected to thermal energy for sintering in order to mature the coating structure. It is also relatively new deposition technique and needs more research endeavours for its exploration and effective utilization. This can be done by process optimization for dependent variables of concern in respect to the appropriately chosen input process parameters. Amongst the existing and previously applied multi-attribute optimization approaches, utility-based Taguchi approach has been practiced in this work due to its commendatory properties like monotonicity and concavity. The utility-based elicitation methodology has been demonstrated for simultaneous optimization of two dependent variables of interest, i.e. adhesion strength and coating thickness of mullite–nickel coatings deposited by SST. The utility values based on the preference structure of these dependent variables have been analysed for process accretion by using Taguchi’s theory. Conﬁrmation experiments assure the conceivability of the approach over the range of coating conditions exerted in the SST experimentation. The characterization of thus produced coatings illustrated formidable microstructure free from any major imperfections, besides conforming to the utility-based Taguchi results for the uniﬁed attribute function comprising the two response parameters under
Arabian Journal for Science and Engineering – Springer Journals
Published: Jun 5, 2018
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