Effect of Reinforcements on Mechanical Properties of Nickel Alloy Hybrid Metal Matrix Composites Processed by Sand Mold Technique

Abstract

Hybrid Metal Matrix Composites (HMMCs) have gained wide applications in aerospace, marine, and domestic areas because of its significant properties relative to external forces and enabling environment. In present research work, Ni-alloy selected as a matrix and Al2O3 of 40–80 μm and TiO2 of 1–5 μm were selected as reinforcements. The composites were prepared by keeping 9 wt. % of TiO2 as unvarying and Al2O3 is varied from 3 weight % to 12 weight % in steps of 3 weight %. Induction furnace is used for the casting of composites and mixing is done by using mechanical stirring at 160 rpm for a time period of 5 min. The prepared composites are then tested for their tensile and hardness as per the ASTM standards. The Scanning Electron Microscopy was used for microstructural study. From experimentation, it was observed that increment in the weight percentage of Al2O3 with constant TiO2 increases the mechanical properties of hybrid composites and proper stirring improves homogeneity in the composite material. The test results show that the addition of Al2O3 up to 9 weight percent increases in tensile strength compared to Ni alloy and tensile strength slowly decreases with the addition of Al2O3 and that the hardness values are directly proportional to the weight percent of the addition of Al2O3 / TiO2.

Effects of Thermal Barrier Coating Using Various Dosing Levels of Aluminium Oxide Nanoadditive Fuel on Diesel in Compressed Ignition Engine

“…As a result, enhanced combustion results from the use of all oxygen in the combustion chamber. This results in increased generation of CO 2 from CO [22], thereby reducing the levels of CO. CO 2 emission is increased for TBC engines. The combustion in the cylinder is improved by different dosages of aluminium oxide and high cylinder temperature.…”

“…The coating generates high temperature which stimulates the conversion of CO into CO 2 . Hence, TBC engines provide improved combustion [22]. CO emissions are reduced by roughly 0.8 percent, 1.4 percent, and 0.7 percent for coated engines at 75 percent of engine load with doses of 35 ppm, 45 ppm, and 55 ppm of aluminium oxide in diesel, respectively, when compared to basic diesel.…”

“…In this discussion, the performance and combustion of a diesel engine, as well as the emission difficulties develop when yttria-and aluminium-stabilised zirconia coatings are applied to the cylinder liner and piston head and when aluminium oxide additive is added at various amounts (35 ppm, 45 ppm, and 55 ppm). The goal of this experiment is to reflect the engine's changes in performance and emission characteristics [22][23][24][25]. This research's findings are analysed, examined, reviewed, and presented in a systemic manner.…”

Wear characterization of Al 7075 alloy hybrid composites

“…These requirements are met by hybrid aluminium composites with enhanced mechanical properties and the potential to be manufactured at a lower cost. Due to the fact that a number of processing parameters are linked to the reinforcing particles, the performance of these materials is largely dependent on the selection of the optimal combination of reinforcing materials [1][2][3][4][5][6][7][8][9]. MMC refers to a wide variety of materials that are typically composed of a metallic matrix and reinforcement for the purpose of imparting desired properties.…”

Optimization of Combustion Characteristics of Diesel Engine Fueled by Biofuels and Its Diesel Blends with Additive Titanium Dioxide Nano-Particles

“…The vegetable oil-diesel oil blend appeared to be a superior option in contrast to unadulterated oils. The expansion in the engine force utilizing this combination forced changes in the infusion timing [23][24][25]. Graef et al directed a test on diesel engine with arranged biodiesel powers from feedstocks with adjusted syntheses including the methyl esters of low palmitic soybean oil, a halfway trans esterified soybean oil, an engineered mix of immersed esters were mixed with No.2 diesel in 20%, half focuses [26].…”