Disperse-strengthening by nanoparticles advanced tribological coatings and electrode materials for their deposition |
| |
Authors: | EA Levashov PV Vakaev AE Kudryashov DV Shtansky A Sanz |
| |
Affiliation: | a Moscow State Institute of Steel and Alloys, Leninsky pr., 4, Moscow 119049, Russia b Air Force Research Laboratory, 2941 Hobson Way, Wright Patterson AFB, OH 45433, United States c SKF Engineering & Research Centre, P.O. box 2350 Kelvinbaan 16, 3430 DT Nieuwegein, 3439 MT Nieuwegein, The Netherlands |
| |
Abstract: | Two types of electrode materials were developed using self-propagating high-temperature synthesis (SHS) and powder metallurgy: 1- composite with nanosized additives; 2- nanostructured cemented carbide WC-Co. Electrospark deposition (ESD) was applied to produce tribological coatings which were disperse-strengthened by incorporation of nanosized particles. Nanostructured electrodes of cemented carbides WC-8% Co provide increasing density, thickness, hardness, Young's modulus, and wear resistance of ESD-coatings. Positive effects of nanostructural state of the electrodes on the deposition process and structure/properties of the coatings are discussed. In that case the tungsten carbide phase becomes predominant in the coatings. A mechanism of the dissolution reaction of WC in Ni at the contact surface of the electrode was proposed. It was shown that formation of the coating structure is initiated on the electrode and accomplished on the substrate. |
| |
Keywords: | Electrospark deposition (ESD) Nanosized additives WC-Co nanostructured electrodes Microstructure Coating |
本文献已被 ScienceDirect 等数据库收录! |
|