FIELD: technological processes.
SUBSTANCE: invention relates to production of tungsten alloyed with niobium or tantalum, and can be used in electrovacuum instrument making, electronics. Method for deposition of monocrystalline tungsten-based alloys by chemical transport reactions on tubular monocrystalline molybdenum substrate installed inside crude tungsten pipe, involves heating substrate by means of internal heater to temperature of alloy deposition of 1,500÷1,800°C
and feeding pentachloride alloying metal in volume of reaction vessel at substrate temperature below deposition temperature of alloy (500÷1,000°C), wherein temperature in deposition zone during entire process of alloy deposition is kept constant within temperature range of 1,500÷1,800°C by gradually raising temperature of substrate as thickness of deposited alloy increases.
EFFECT: invention enables to obtain chemically uniform thickness of alloy due to invariance of gas phase in zone of decomposition of halides in time.
4 cl, 5 dwg, 3 ex
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