Effect of extrusion temperature on the microstructure and porosity of A356-SiCp composites

Microstructural and mechanical properties of Al-4.5wt% Cu reinforced with alumina nanoparticles by stir casting method

“…As the ceramic particles were not pre-heated in this study, the formation of an air gap around the particles in this study might be due to the gas layers, which are always present on the ceramic particles [1,6,7,10,14]. Fig.…”

“…This is primarily due to their lightweight, low coefficient of thermal expansion, machinability, improved mechanical properties such as 0.2% YS, UTS, and hardness. Due to these advantages, they are used in aerospace industries (airframe and aerospace components), automobile industries (engine pistons), and electronic components [1][2][3][4][5][6][7][8].…”

“…This process is the most economical of all the available routes for AMMCs production and allows very largesized components to be fabricated. However, methods of achieving the following in stir casting are: (i) no chemical reaction between the reinforcement material and matrix alloy, (ii) low porosity in the cast AMMCs, (iii) wettability between the two main substances, and (iv) achieving a uniform distribution of the reinforcement material [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

A Novel Method for Incorporation of Micron-Sized SiC Particles into Molten Pure Aluminum Utilizing a Co Coating

“…Due to these advantages, they are used in aerospace industries (airframe and aerospace components), automobile industries (engine pistons), and electronic components. [1][2][3][4][5][6][7][8] Many techniques have been developed for producing particulate-reinforced AMMCs, such as stir casting, squeeze casting, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and powder metallurgy. [19][20][21] Although each of these methods has its own advantages and disadvantages, they are all relatively expensive.…”

“…However, methods of achieving the following in stir casting are mostly to be considered: (i) no adverse chemical reaction between the reinforcement material and matrix alloy, (ii) no or very low porosity in the cast AMMCs, (iii) wettability between the two main phases, and (iv) achieving a uniform distribution of the reinforcement material. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Some of the methods used to achieve these goals during stir casting of aluminum matrix composites are the modification of the alloy composition, coating or specific treatments to the reinforcements, and control of the process parameters (stirring temperature and time, etc.). [11][12][13][14] Among these, coating of the reinforcement is a successful technique used to prevent adverse interfacial reaction and promote wetting of the particles by aluminum through increasing the overall surface energy of the solid.…”