Research on microstructure and wear resistance of coatings obtained by adding nanoparticles of refractory compounds in laser cladding
| Autor: | S N Chirikov, Y V Markushov, M A Murzakov |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
History
Microscope Materials science Tantalum chemistry.chemical_element Wear coefficient 02 engineering and technology engineering.material 01 natural sciences Microanalysis Education law.invention chemistry.chemical_compound Coating law Tungsten carbide 0103 physical sciences Ceramic 010302 applied physics Metallurgy 021001 nanoscience & nanotechnology Microstructure Computer Science Applications chemistry visual_art engineering visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Physics: Conference Series. 747:012062 |
| ISSN: | 1742-6596 1742-6588 |
| Popis: | The paper is aimed at research of coatings, which are achieved by means of laser cladding with additives of nanoparticles of high-melting compounds in form of tungsten carbide and tantalum (WC and TaC). In the course of experiment, various ceramic powder concentrations were tested. Main technological characteristics were determined. Power density amounted to 0.68-0.98 MW/cm2. During the coating wear resistance measurement, it was discovered that increase in nanopowder concentration extended wear resistance of coating 2-6 times. Wear resistance measurement and wear coefficient calculation were performed using Brinell-Howarth method. The load was 15 N, load time was 10 minutes. Optical metallographic microscope Neophot-30 was used to study microstructure of the deposited coatings. To reveal microstructure of the deposited coatings, the samples were exposed to chemical etching. Elemental composition of the samples was determined by the methods of X- ray microanalysis in testing solution using electron microscope EVO-50 under acceleration voltage 10-20 kV (probe current 5-50 nA) using energy- and wavelength-dispersive spectrometers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|