Author

Jain

Date of Award

12-2003

Degree Name

Master of Science

Department

Civil and Construction Engineering

First Advisor

Dr. Pnina Ari-Gur

Second Advisor

Dr. Valery Blinznyuk

Third Advisor

Dr. Sam Ramrattan

Access Setting

Masters Thesis-Open Access

Abstract

Coatings of nickel with and without silicon carbide nano-particles were carried out on 2024-T3 aluminum alloy by the electrochemical process. The size of the silicon carbide particles was less than 50nm. Nickel coatings were done using a nickel sulfamate bath maintained at a constant temperature of 50° ± 5° C. Tensile specimens were prepared and studied to determine the Young's modulus of bare aluminum, with nickel coatings and with composite nickel and silicon carbide coatings. Wear samples of 1 inch2 (6.45cm2) were prepared and studied for wear resistance. The residual stress measurements were done by the hole drilling method and were compared with bending due to tension. Potentiodynamic corrosion tests were carried out to study the corrosion rates of bare aluminum and that of 50 microns and 208 microns nickel only samples. The thickness of the coatings was determined using scanning electron microscope. The stiffness of the samples increased with the increasing silicon carbide content to 21 g/L. the corrosions resistance and the wear resistance increased with nickel coating. Tensile residual stresses were found in the coating.

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