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Yuri I. Gordeev
Vitaly B. Yasinski
Aleksandr S. Binchurov
Nikolay E. Anistratenko
Irina V. Nikolaenko
2019-07-01T07:26:40Z
2019-07-01T07:26:40Z
2018-04
Yuri I. Gordeev. Combined Application of Composite Powders WC-Co and Additives of Nanoparticles as an Effective Method of Improving the Properties of Hard Metals [Текст] / Yuri I. Gordeev, Vitaly B. Yasinski, Aleksandr S. Binchurov, Nikolay E. Anistratenko, Irina V. Nikolaenko // Key Engineering Materials: High Technology: Research and Applications 2017. — 2018. — Т. 769. — С. 134-140
10139826
https://www.scientific.net/KEM.769.134
http://elib.sfu-kras.ru/handle/2311/110805
The results of experimental studies show that the use of composite powders (WC-Co) in combination with the modification by the additives of ceramic nanoparticles allows controlling the parameters of the microstructure and increasing the strength of the binder and the level of physical and mechanical properties of the hard metal in general. The coating of carbide particles with a layer of a binder is an effective starting method that allows to obtain a bulk compound that preserves the unique properties of the initial nanopowders and ensures a uniform distribution of the phases (WC, Co, Al2O3). Such multiphase fragmentary nanostructured composite is characterized by additional heterogeneity, determined by the differences in size and elastic properties of the phases. By combining the sizes and properties of the phase components in such heterogeneous composite, it is possible to increase the fracture energy (i.e. Palmqvist fracture toughness) up to 20 - 22 MPa∙m1/2 as a result of inhibition on inclusions of nanoparticles the stress relaxation and change in the trajectory of the intergranular crack. Based on the proposed stereological models and experimentally established relationships between composition and microstructure parameters, the required volume concentrations of nanoparticles’ additives and composite powders (WC-Co) were determined.
Composite Powders
Fracture Toughness
Hardmetal Composites
Microstructure Parameters
Nanoparticle
Nanostructured Materials
Strength Toughness
Combined Application of Composite Powders WC-Co and Additives of Nanoparticles as an Effective Method of Improving the Properties of Hard Metals
Journal Article
Journal Article Preprint
134-140
53.39
2019-07-01T07:26:40Z
10.4028/www.scientific.net/KEM.769.134
Политехнический институт
Кафедра конструкторско-технологического обеспечения машиностроительных производств
Key Engineering Materials
Q3


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