Formation of Fe-Cu-Ni-Sn-VN Nanocrystalline Matrix by Vacuum Hot Pressing for Diamond-Containing Composite. Mechanical and Tribological Properties
| Autor: | V. I. Zakiev, Sergey Dub, N. A. Bondarenko, I. M. Zakiev, N. O. Kuzin, V. M. Kolodnitskyi, S. R. Ignatovich, V. A. Mechnik |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Vanadium nitride Sintering Diamond chemistry.chemical_element 02 engineering and technology engineering.material Hot pressing 01 natural sciences Nanocrystalline material Inorganic Chemistry chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry Ferrite (iron) 0103 physical sciences engineering General Materials Science Composite material Tin Elastic modulus |
| Zdroj: | Journal of Superhard Materials. 41:388-401 |
| ISSN: | 1934-9408 1063-4576 |
| DOI: | 10.3103/s1063457619060030 |
| Popis: | The processes of structure formation, mechanical and tribological properties under vacuum hot pressing of a blend of powders of iron, copper, nickel and tin with a dispersion of 5–50 µm with the addition of a nanopowder of vanadium nitride depending on temperature are described. It was found that an increase in sintering temperature from 800 to 1000°C leads to grinding of ferrite grains to 20–400 nm, the release of primary (d = 10–100 nm) and secondary (d ≤ 10 nm) VN grains and an increase in hardness from 3.75 to 5.37 GPa and H/E parameters from 0.021 to 0.043 and H3/E2 from 1.70 to 9.91 MPa, a decrease in the elastic modulus from 176 to 125 GPa and a friction force from 250 to 180 mN, a decrease in speed wear from 8.15 × 10−4 to 1.79 × 10−4 mm3·N−1·m−1. The mechanism of grain refinement and the improvement of physical and mechanical properties is due to α → γ → α transformations occurring under conditions of VN dissolution in α-Fe and subsequent cooling. |
| Databáze: | OpenAIRE |
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