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Optimization of RF Magnetron Sputtering Parameters for Deposition of Zinc Oxide Semiconductor Film at Moderate Temperature of 100°C

PRIST-Amutha Surabi Muthukarappan
Gwangju Institute of Science and Technology-Seong-Ju Park
Published 2019-10-11 by SAE International in United States
Zinc oxide semiconductor thin films are deposited on glass substrate at different RF magnetron sputtering parameters. The deposited films were characterized as a function of substrate - target distance, gas flow ratio, working pressure and RF power. X-ray diffraction, Field emission scanning electron microscopy, and hall measurement were utilized to analyze the effect of the deposition condition on the structure, surface morphology and electrical properties of ZnO thin films. The deposition conditions were optimized to give good quality films suitable for the application of flexible or invisible flat panel display. All the films were deposited at 100°C.
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Experimental Investigation of Silicon Carbide Nanoparticles Reinforced Magnesium Alloy (AZ91E) Metal Matrix Composite by Vacuum Stir Casting Method

PRIST-Thirugnana Sambandham Thangavel, Kannan Mahadevan
Centre for Automotive Materials, SRMIST-Chandradass Jeyaseelan, Baskara Sethupathi Paramathma
Published 2019-10-11 by SAE International in United States
In the present investigation silicon carbide nanoparticles reinforced magnesium alloy [AZ91E] composites were prepared by vacuum stir casting process in an inert atmosphere. Required amount of silicon carbide nanoparticles with grain size of 50nm was added into AZ91E molten melt with constant stir speed of 600 rpm and vacuum pressure of 1 lpm to obtain magnesium alloy composite containing 0, 5, 7.5 and 10 wt.% SiCp nanoparticles. The prepared composites were subjected to mechanical and microstructure studies. The mechanical properties were found to increase with the addition of silicon nanoparticles compared to unreinforced magnesium alloy. The maximum impact strength, yield strength and tensile strength were found to be 29.13J, 156 MPa and 401.13 MPa respectively. Microstructure studies reveal uniform distribution of silicon carbide in magnesium alloy matrix.
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Fabrication and Mechanical Properties of Alumina Nanoparticle Reinforced Magnesium Metal Matrix Composite by Stir Casting Method

PRIST-Thirugnanasambandham T
Centre for Automotive Materials, SRMIST-Chandradass J, P Baskara Sethupathi
Published 2018-07-09 by SAE International in United States
In the present experimental investigation magnesium based alloy was prepared by mixing magnesium powder and aluminium powder in the ratio 65:35. The prepared magnesium alloy is used as the matrix material. Metal matrix composites were prepared by stir casting route. The composite was prepared by reinforcing 50 nm alumina nanoparticle so that the final composite contains 5, 10 and 15 wt.% alumina. Mechanical properties such as tensile strength, yield strength, impact strength and hardness were evaluated. Significant improvement was observed in impact strength and hardness value. The result showed that magnesium alloy with 5 wt.% alumina nanoparticle has a maximum impact strength of 25.2 J and hardness value 63.86 Hv respectively. Tensile strength and yield strength shows marginal increase in value.
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