No abstract

Abstract

Composite resin is quickly becoming the most extensively utilized material in the field of cosmetic and restorative dentistry. It eliminates the problem of poisonous nature caused by the amalgam's mercury content. This research article is based on the outcome of adding micro‐alumina and zirconia particulates filled dental composites on the physical properties, mechanical properties, and wear analysis. Three dental composites named AZDC2, AZDC4, and AZDC6, were prepared. Alumina microparticles were constant (6 wt%) while zirconia microparticles were varying (2, 4, and 6 wt%). Two‐body wear was performed on pin‐on‐disc friction & wear test rig under dry sliding for all three dental composites under different normal load (20, 40, and 60 N) and sliding speed (10, 15, and 20 mm/s). The experiments were designed as per L9 Taguchi orthogonal array. The least volumetric wear was found in AZDC6 dental composite under a sliding velocity of 15 mm/s and a normal load of 20 N. From the ANOVA analysis, normal load and filler content were the significant factors affecting the volumetric wear with a significance level 5%, respectively. Dental composite AZDC6 exhibited maximum compressive strength (451.49 MPa). Micro hybrid particulates‐filled dental composites improve physical and mechanical characterization.

Metal matrix composite having aluminium 6061 as matrix incorporating red mud reinforcement has been casted by employing stir casting. Scanning electron microscopy images has been taken to observe the uniformity of the red-mud reinforcement in the aluminium 6061 matrix. The inclusion of reinforcement inside the matrix of the fabricated composite has been confirmed by Energy dispersive spectroscopy. The results reveal that the coefficient of friction increases by larger sliding distance and decreases in response to higher sliding velocity. Also, coefficient of friction first increase up to second level with increase in applied load after that continuously reduced with further applying higher load. Study reveals that the coefficient of friction has been minimum at 125 micrometer particle size and has maximum value at 250 micrometer. Delta analysis shows percentage reinforcement has least effect on output i.e. coefficient of friction. Further, coefficient of friction decreases with higher aging time but again increases for 24 hour aging time. The ANOVA analysis concludes, the parameters i.e. aging time, sliding distance, sliding speed have found significant effect but the impact of particle size and load have been not comes out significant. The ANOVA revealed descending order of significance for the studied parameters has been: sliding speed, aging time, sliding distance, particle size and load.