|About this Abstract
||Materials Science & Technology 2011
||Cold-Sprayed Self-Lubricating Coatings Utilizing Ni-Encapsulated Particulate Composites
||Ivi Smid, Lisa Stark, Albert Segall, Tim Eden
|On-Site Speaker (Planned)
Self-lubricating coatings can improve the performance of contacting surfaces and extend component lifetimes by reducing the coefficient of friction and/or specific wear. In this study, self-lubricating coatings of hexagonal-boron-nitride particles in a nickel matrix were investigated and optimized for friction and wear. The self-lubricating coatings were created via cold spray of micron-size, hexagonal-boron-nitride powder encapsulated by nickel and nickel-phosphorous alloys. Relatively thick nickel encapsulation was required to aid in coating bonding and formation, and was achieved via electrolesss Ni plating. The encapsulation process was found to be scalable and amenable to relatively small hBN particles. Once deposited on aluminum substrates, the coatings were analyzed for bond-strength, micro-hardness, coefficient of friction, and reciprocating wear behavior. It can be concluded that the cold spray process can be used for the deposition of Ni-BN composite coatings which possess superior reciprocating wear resistance, reduced friction, and high adhesive strengths relative to pure Ni coatings.
||Definite: A CD-only volume