Powder Technology, Vol.377, 244-256, 2021
Evaluating the influence of milling time,and sintering temperature and time on the microstructural changes and mechanical properties of Al-Y2W3O12-AlN hybrid composites
The present investigation evaluates the effect of milling time, sintering time (t) and temperature (T), and amount of reinforcement (R) on the relative density (RD), hardness (H) and compressive strength (CS) of aluminium matrix hybrid composites both experimentally as well as statistically using response surface methodology (RSM). The powders were milled for various times, i.e., 0.5, 2, 4, 6, 8,10,12 &14 h and 10 h milled powder exhibited the desired microstructure. Subsequently, the 10 h milled powders were sintered at 550, 600 & 650 degrees C for 1 h. The 10 h milled powders were also sintered for various times, i.e., 1, 1.5 & 2 h at 600 degrees C temperature. The maximum values of RD, H and CS are obtained when the 10 h milled powders are sintered at 600 degrees C for 1 h. The RSM technique successfully correlates the T, t and R with RD, H and CS. (C) 2020 Elsevier B.V. All rights reserved.
Keywords:Aluminum matrix hybrid composites;Relative density;Hardness;Compressive strength;Response surface methodology