The La2O3 particles dispersed in the molybdenum-lanthanum alloy greatly improve the alloy properties. Compared with pure molybdenum, the molybdenum-lanthanum alloy has higher thermal electron emission performance, tensile and bending resistance, better ductility and fracture toughness, and good creep resistance. There are many factors that affect the final performance of the molybdenum-lanthanum alloy, including the content of dopants, doping process, sintering process, deformation process and heat treatment process. Among them, the appropriate doping amount (1%) can greatly increase the comprehensive properties of the molybdenum alloy such as strength and plasticity, but when the content is too high, the strength and elongation are reduced.
1. Alloy doping process
There are three main ways to dope La2O3 in Mo metal.Solid-solid doping method: Molybdenum powder and La2O3 powder are mixed by ball milling, and then pressed and sintered to form a molybdenum alloy; Solid-liquid doping method: Lanthanum nitrate is sprayed into molybdenum oxide by atomization, dried and reduced, and then pressed and sintered to form a molybdenum alloy; Liquid-liquid doping method: A soluble lanthanum salt solution is added to the molybdenum salt solution, and a molybdenum alloy is formed by spray drying, reduction, pressing and sintering. Different doping processes have their own characteristics, among which the molybdenum-lanthanum alloy prepared by liquid-liquid doping has better performance than the other two methods.
2. Application fields
Molybdenum-lanthanum alloy is currently widely used in electronics, aerospace, nuclear energy, mechanical processing and other fields due to its excellent performance. In the field of electronics, due to the characteristics of strong toughness, high emissivity and pollution-free, molybdenum-lanthanum alloy can replace thorium-tungsten material as cathode material, solving the serious radioactive pollution problem of traditional thorium-tungsten cathode after preparation, processing and disposal; in the field of aerospace, molybdenum-lanthanum alloy as engine nozzle material has good ablation resistance, fully meets the use requirements of short-term solid rocket engines, and has been used in batches; in the field of mechanical processing.Molybdenum Lanthanum Wire replaces pure molybdenum wire as electric spark wire cutting electrode wire, and its service life is about 50% higher than that of pure molybdenum wire, which can effectively save costs. Molybdenum-lanthanum alloy can also be used as a high-temperature furnace heating element, X-ray pole target, mold, etc., which is very valuable for promotion and application.
Our company can also provide other molybdenum lanthanum alloy products such as Molybdenum Lanthanum Foil and Molybdenum Lanthanum Rod. Please feel free to contact us by email.
