TY  - EJOU
AU  - Vikram, Kamlendra 
AU  - Ragavendran, Uvaraja 
AU  - Kalita, Kanak 
AU  - Ghadai, Ranjan Kumar 
AU  - Gao, Xiao-Zhi 

TI  - Hybrid Metamodel—NSGA-III—EDAS Based Optimal Design of Thin Film Coatings
T2  - Computers, Materials \& Continua

PY  - 2021
VL  - 66
IS  - 2
SN  - 1546-2226

AB  - In this work, diamond-like carbon (DLC) thin film coatings are deposited on silicon substrates by using plasma-enhanced chemical vapour deposition (PECVD) technique. By varying the hydrogen (H<sub>2</sub>) flow rate, CH<sub>4</sub>−Argon (Ar) flow rate and deposition temperature (T<sub>d</sub>) as per a Box-Behnken experimental design (BBD), 15 DLC deposition experiments are carried out. The Young’s modulus (E) and the coefficient of friction (COF) for the DLCs are measured. By using a second-order polynomial regression approach, two metamodels are built for E and COF, that establish them as functions of H<sub>2</sub> flow rate, CH<sub>4</sub>-Ar flow rate and T<sub>d</sub>. A non-dominated sorting genetic algorithm (NSGA-III) is used to obtain a set of Pareto solutions for the multi-objective optimization of E maximization and COF minimization. According to various practical scenarios, evaluation based on distance from average solution (EDAS) approach is used to identify the most feasible solutions out of the Pareto solution set. Confirmation experiments are conducted which shows the efficacy of the polynomial regression—NSGA-III—EDAS hybrid approach. The surface morphology of the DLCs deposited as per the optimal predictions is also studied by using atomic force microscopy.
KW  - Multi-objective optimization; regression analysis; thin-film coating

DO  - 10.32604/cmc.2020.013946