CHANGING THE MICROHARDNESS OF ABSOLUTE SOLID ALLOYS WITH THEIR IRRADIATION OF A GAS-METALLIC BEAK OF ARGON AND ZIRCONIUM IONS
Keywords:
tungsten-free, refractory compounds, microhardness, composite, implantation, ions, dose, binding phase, cermet teethAbstract
In this paper, we consider a method for increasing the microhardness of the surface of a tungsten carbide based on titanium carbide with a titanium nickelide (TiNi) intermetallide. It is known that the matrix in solid composite materials should exhibit the ability to randomly form during the deformation of the composite, and also to harden and wet the solid particles well, providing a strong bond over the phase boundaries and a high density during sintering. The increase in the strength properties and hardness of composite materials is achieved by improving the microstructure, eliminating defects in their structure, while improving the wetting processes of the bonding phase. It has been experimentally established that the process of irradiating the surface of polished samples with Ar+ and Zr+ ions with an energy of about 20 keV and a dose of 1017 ion/cm2 of a hard alloy leads to a significant change in the microhardness of the material due to the formation of quenching point defects that arise upon intensive heating and cooling of composite samples. As a result of the implantation of solid alloys, the structure is formed in highly nonequilibrium conditions of interaction of the surface of a non-slippery alloy with a concentrated flow of energy and matter. Therefore, this method of increasing strength and microhardness is a promising way to increase the wear resistance of disintegrator beams and cermet teeth used in road construction machines for repairing road surfaces. In addition, a change in the temperature arising upon irradiation of solid alloys of the TiC–TiNi system plays a significant role in the formation of its structure and in the change in microhardness on the surface of the samples.References
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