Molybdenum-lanthanum alloy wire is a key material for breaking through the bottleneck of the high-temperature performance of pure molybdenum
Pure molybdenum wire, with a purity of over 99.95% and a dense crystal structure, has long held a significant position in high-temperature vacuum or inert environments. However, when the temperature exceeds 1500℃, its inherent recrystallization embrittlement phenomenon begins to manifest - the grains rapidly coarsen, and the creep resistance drops by approximately 40%, severely limiting its application potential in higher-temperature environments. By precisely adding 0.5%-1.2% of lanthanum oxide (La₂O₃), molybdenum lanthanum wire can be obtained. Inside the material, dispersed nano-sized oxide particles are formed, significantly raising the recrystallization temperature to above 1800℃, bringing a revolutionary breakthrough to the high-temperature industrial field.
The core advantage of the molybdenum-lanthanum alloy wire lies in its unique micro strengthening mechanism. Under high-temperature conditions, the dispersed nano-sized lanthanum oxide particles exhibit a significant "locking effect", effectively hindering the migration of grain boundaries and increasing the migration resistance by more than three times. This mechanism enables the material to maintain a tensile strength 2.1 times that of pure molybdenum wire at a temperature of 1600℃. Through gradient doping technology, a continuous and uniform mesh structure of lanthanum elements can be formed at the grain boundaries, further enhancing the high-temperature stability. In a continuous operation test at 1800℃, the lifespan of the molybdenum-lanthanum alloy wire exceeded 2000 hours, achieving a performance leap of 4-5 times compared to the 500-hour lifespan of pure molybdenum wire at the same level.
Although pure molybdenum wire, due to its excellent ductility (with a tensile rate at room temperature of ≥ 25%), has advantages in ultra-fine wire processing and can be drawn into extremely fine wires with a diameter of 0.05mm, which can meet the high-precision requirements of semiconductor heating coils and other applications, the second-phase strengthening effect of molybdenum-lanthanum alloy wire does indeed increase the difficulty of cold processing. Through the "multi-pass temperature rolling process", the finished wire diameter is controlled at the 0.1mm level, which not only retains the high-temperature performance advantage of the alloy wire but also expands its application range in precision device manufacturing, demonstrating outstanding process adaptability.
In the semiconductor manufacturing field, pure molybdenum wires remain the traditional choice for the graphite base heater of MOCVD equipment due to their excellent shape memory effect and low gas emission characteristics. However, with the rise of the third-generation semiconductors, higher requirements have been imposed on material performance. In the ultra-high temperature environment of 2200°C required for SiC epitaxial growth, a fault-free operation record of over 800 hours has been achieved, providing key material support for the manufacturing of wide bandgap semiconductors and promoting the semiconductor industry to advance to higher-temperature processes.
In the field of vacuum heat treatment for key components such as aircraft engine blades and high-end bearings, the thermal fatigue resistance of the materials is of vital importance. Comparative test data shows that under a cycle condition ranging from 1300℃ to room temperature, the crack initiation period of molybdenum-lanthanum alloy wires is 7.3 times that of pure molybdenum wires. When molybdenum-lanthanum alloy wires are applied to the vacuum quenching production line of various types of aircraft bearings, their outstanding thermal fatigue resistance significantly improves the heat treatment quality and equipment reliability, providing a strong guarantee for aerospace manufacturing.
The molybdenum-lanthanum alloy wire not only breaks through the high-temperature performance bottleneck of pure molybdenum material, but also opens up a new path for strengthening refractory metals. With the rapid development of strategic emerging industries such as photovoltaic new energy, third-generation semiconductors, and aerospace, the demand for high-performance high-temperature materials will continue to increase.
Molybdenum Wires are demanded in various parts of the world, such as: USA, Canada, Chile, Brazil, Argentina, Colombia, Germany, France, United Kingdom, Italy, Sweden, Austria, Netherlands, Belgium, Switzerland, Spain, Czech Republic, Poland.
As professional Chinese manufacturer, Mosten Alloy can produce and supply molybdenum electrode, molybdenum strip, molybdenum sheet, molybdenum pellet, molybdenum block, molybdenum tube, molybdenum rod, molybdenum wire, molybdenum processing workpiece according to customer demand.
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