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- W4254998378 abstract "The interaction of a carbide-cobalt hard alloy (K 10, International Standards Organization) with powdery B4C and the product Borozar-HM and the effect of this interaction on the structure and hardness of the diffusion layer obtained are investigated. The phase composition of the diffusion layers is shown to depend on the type of the powders and on the temperature and duration of the boronizing process. As a result of thermal treatment with Borozar-HM, the phase CoWB is formed in the diffusion layer whereas in the case of B4C the boron-richer CoW2B2 and CoB phases prevail.The Co-W-B phase diagram, the concentration of dissolved tungsten in the binder and the difference in mass transfer of boron from the two boride powders are used to determine the phase composition of the layer. The homogeneous diffusion layer with a small number of defects, formed during the interaction of the alloy with Borozar-HM, was studied by electron microscope analysis. It is shown that the difference in phase composition of the diffusion layers obtained with the two boron compounds affects the layer hardness. The thermochemical treatment of the alloy with Borozar-HM leads to the appearance of superhard surface layers exceeding in hardness those obtained with B4C. The maximum Vickers hardness measured IIV01 = 23.4 GPa is attributed to the single-phase diffusion layer of CoWB obtained." @default.
- W4254998378 created "2022-05-12" @default.
- W4254998378 date "2000-03-01" @default.
- W4254998378 modified "2023-10-17" @default.
- W4254998378 title "Potential of a composite with toughness and resistance to plastic deformation" @default.
- W4254998378 doi "https://doi.org/10.1016/s0026-0657(00)93909-2" @default.
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