[Increasing the working life of dental excavators by the addition of a layer of hard alloy to the working surface].

The use of hard alloy coatings for the working surfaces of the hatchet excavator applied by electric spark alloying can increase the working life of the above instruments by 0.5-1.5 times.

[Change in the properties of titanium alloys exposed to a stream of high-frequency, low-pressure radiating plasma].

The Nitrogen-Argon plasma of a high-frequency low-pressure discharge is proven to be very effective in machining pieces made of titanium alloys. The optimum operating modes are found that improve surface microhardness, reduce surface roughness, increase durability and endurance limits, and do not produce the effect on the residual stress. The operating modes have been tested with great success in machining microsurgical and ultrasonic surgical instruments.

[Experience in plasma-detonation coating of the working parts of medical instruments with nickel-aluminide-based alloys].

The composition, the structure, and basic physical and mechanical properties of coatings composed of the nickel aluminide-based alloys HA-67, BKHA are examined. They are obtained by the detonation and plasma methods and by the combined detonation-plasma method as well. Because of the increased binder-base strength, a great and more uniform hardness, plasma-detonation coatings have been shown to be optimal as compared to the detonation and plasma methods.

[Effect of nonequilibrium plasma parameters on the surface characteristics of titanium medical instruments].

Hardening in the stream of nonequilibrium plasma seems to be promising for medical microinstruments made of titanium alloys. The impact of parameters of nonequilibrium plasma and operational conditions of the set on surface properties for several titanium alloys has been studied.