King Fahd University of Petroleum and Minerals

Muhammad Umar Azam

Abbas Saeed Hakeem

Ahmad A Sorour

Bilal Anjum Ahmed

Mohammed Abdul Samad

Akeem Yusuf Adesina

Bearing steel comprising cubic boron nitride (c-BN) and/or nickel coated cBN spark plasma sintered at a temperature in the range of 850-1050&#xb0; C. is disclosed. The tribological and corrosion resistance of the bearing steel improved with increasing the amount of c-BN. Further improvement in the properties was achieved with the incorporation of nickel coated c-BN, which caused a phase transition of the bearing steel from magnetic to non-magnetic phase accompanied by interdiffusion enhancement between the matrix and c-BN reinforcement.

Spark plasma sintered cBN and Ni-cBN bearing steel

A method for forming a nanocomposite coating on a substrate is described. The nanocomposite substrate comprises polyethylene, functionalized carbon nanotubes, and nanoclay. The method may use microparticles of UHMWPE with functionalized carbon nanotubes and clay nanoplatelets to form a powder mixture, which is then applied to a heated substrate to form the nanocomposite coating. The nanocomposite coating may have a Vickers hardness of 10.5-12.5 HV and a debonding strength of at least 25 N.

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Dhahran, Saudi Arabia

Muhammad Umar Azam