THE DEPOSITION OF Ni/Cr-Cr_3C_2 COMPOSITE COATINGS BY Arc-EB HYBRID TECHNOLOGY

摘要

The new hybrid technology is a combination of electron beam evaporation and arc-evaporation processes, enabling the creation of the anti-erosion multilayer composite coating Ni/Cr-Cr_3C_2 with different volume of Cr_3C_2 filling in soft Ni/Cr matrix. The soft matrix made of Ni/Cr alloy and hard filling of Cr_3C_2 are created at the same time and directly during the electron beam and arc-evaporation process. Changes of the parameters of the hybrid process, i.e. pressure, current of arc discharge and substrate bias voltage U_(bias), make it possible to control the volume of Cr_3C_2 and are a factor in filling the soft Cr/Ni matrix with carbides Cr_3C_2. With the use of the developed surface treatment hybrid technology, the multilayer composite coating Ni/Cr-Cr_3C_2 were obtained. For all composite layers created, the material properties, such as morphology, phase and chemical compositions, hardness, and Young modulus were investigated. The paper presents the original technological equipment, methodology, and technological parameters for the creation of the composite coating Ni/Cr-Cr_3C_2.