Tungsten-lanthanum alloy

Model No.: JDTG-CM-059

Brand: ZZJD

Place Of Origin: China

Size:  Custom-made

Material: 85-99% Tungsten

Denstiy: 15.8-18.75 g/cm3

Surface: Sintered, Forged, Grounded

Tungsten-lanthanum alloy is a composite material with excellent properties

• Composition and Structure：
• It is a composite material with metallic tungsten as the matrix and nanoscale lanthanum trioxide (La₂O₃) incorporated to form a dispersion-strengthening phase. The content of La₂O₃ is controlled within the range of 0.5%-2.5% (mass fraction), and the particle size is concentrated at 20-100nm, distributed in a chain shape along the grain boundaries.
• Production Process：
• It is usually prepared by powder metallurgy and flash sintering processes. The preparation process includes three stages. First, ammonium paratungstate and lanthanum nitrate are mixed in a liquid phase, and after vacuum drying, a composite powder is obtained. Then, tape casting is carried out, and the solid content of the slurry is maintained at 60%-70%. After drying, flash sintering is carried out at a temperature of 1000-1200°C and a current density of 40-60mA/mm². Finally, plastic processing such as cold rolling and rotary forging is carried out.
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• Performance Characteristics：
• The alloy has the characteristics of grain refinement and excellent creep resistance. Its recrystallization temperature is increased to above 2200°C. When the La₂O₃ doping amount is 1.0%, the hardness HV can reach 480, which is about 30% higher than that of pure tungsten. The room-temperature bending strength reaches 740-780MPa, and the elongation at break at 500°C is 45% higher than that of traditional tungsten alloys.
• Application Fields：
• It is suitable for high-strength scenarios such as plasma welding electrodes and nuclear fusion device components. For example, the 1.5% lanthanum-tungsten electrode used in argon arc welding has a conductivity close to that of the traditional 2.0% thorium-tungsten electrode, and there is no radioactive pollution. As a candidate material for the ITER project, it can withstand a neutron irradiation dose of 1×10²⁴n/m².
• Appearance：
• The tungsten-lanthanum alloy wire prepared by the process is usually a straight wire, and the surface is smooth and shiny.