MATERIALS AND METHODS FOR CARRYING OUT GRADUAL AND COMPLEX TRIBOLOGIC LAYERS IN VACUUM FOR COATING METAL OBJECTS SUBJECTED TO FRICTION

摘要

The invention relates to materials and methods for carrying out gradual complex tribologic layers made of 2...5 different materials, used for coating metal pieces subjected to friction, namely friction couplings, the materials conferring on the coated pieces an increased tenacity and hardness, an increased thermal and chemical stability, as well as a reduced friction coefficient. According to the invention, the materials comprise 2, 3, 4 or 5 materials, as follows: TiN + WS, TiCN + WS, TiAlN + MoS, C + WS, TiN + AlO+ WS, TiCN + BN + WS, TiAlN + C + WS, TiN + AlO+ C +WS, TiAlN + BN +AlO+ WS, TiC +BAM + C + WS, Ti + c/h_BN + AlO+WS, Al + TiN +BCN + YO+ C + MoS, W + TiCN + WB+ ZrO+ WSand the like. As claimed by the invention, the method has a single technological cycle and it is carried out in an installation for depositing the thin layers under vacuum, said installation being provided with 2...5 sources of vacuum deposition of the thin layers such as magnetrons of the Penning type sputtering cathodes, electric arc evaporation cathodes or PLD targets, by using economical and non-polluting methods of the type: "Standard Magnetron Sputtering", "Reactive Magnetron Sputtering", "High Power Pulsed Magnetron Sputtering", "Standard Cathodic Arc Evaporation", "Pulsed Laser Deposition", "Standard Electric Arc Vapour Deposition" or the like, so that they allow a multitude of coating types to be obtained where the tribologic layer properties depend on the concentration variation of the materials comprised by the tribologic layer.