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Tungsten crucibles are widely used in crystal growth, metal smelting and vacuum evaporation processes. However, in the high-temperature oxidation environment, its performance has certain particularities and limitations, which has become an important issue that must be paid attention to in its practical application. In air or oxygenated atmosphere, when the temperature exceeds 400°C, the tungsten surface begins to oxidize to form tungsten trioxide (WO?). As the temperature rises further, this oxide gradually forms a brittle oxide film on the surface…

Although tungsten itself has excellent thermal stability and corrosion resistance, the actual service life of tungsten crucibles is affected by a number of factors. Therefore, a lifetime assessment of the system not only helps to improve the efficiency of equipment operation, but also reduces material waste and maintenance costs. The main factors affecting the life of tungsten crucibles include temperature conditions, working atmosphere, frequency of use, type of smelted material, processing quality and number of thermal cycles. Temperature plays a…

Tungsten crucible is one of the typical applications of tungsten material, in addition to the performance of the material itself, the influence of machining accuracy on the final performance of the crucible can not be ignored, especially in the context of increasingly strict requirements for high-precision manufacturing and thermal field control, processing quality has become one of the key factors to evaluate the reliability and practicability of the crucible. First of all, machining accuracy is directly related to the accuracy…

As an important part of the process of carrying molten metal, crystal growth, high-temperature evaporation, etc., tungsten crucible must not only have excellent high-temperature stability and chemical inertness, but also have good heat transfer performance to ensure the thermal efficiency of the process and the uniformity of temperature control. The intrinsic thermal conductivity of tungsten is about 170 W/(m·K) at room temperature, which is among the highest among all metallic materials, which means that it has an extremely strong ability…

Tungsten crucibles are widely used in sapphire crystal growth, rare metal smelting, high-temperature material testing and other fields due to their excellent high-temperature stability and corrosion resistance. In these applications, thermal conductivity, as an important physical parameter to measure the heat transfer ability of materials, directly affects the temperature field distribution, thermal stress development and overall thermal management performance of the crucible, so it is of great significance to systematically analyze the thermal conductivity of the W crucible. The thermal…

Among many components, tungsten crucibles are attracting more and more attention from research institutions and industries due to their excellent heat resistance, corrosion resistance, radiation resistance and other characteristics, and its potential applications in nuclear fuel processing, high-level radioactive waste treatment and next-generation nuclear energy systems are worthy of in-depth discussion. First of all, in the high-temperature smelting and remanufacturing of nuclear fuel, W crucibles show obvious advantages. Thorium-based or uranium-based nuclear fuels often need to be operated at high…

Tungsten material is widely used in high-temperature thermal field, vacuum smelting, crystal growth and other cutting-edge scientific and technological fields. In these applications, tungsten crucibles have become important vessels for carrying molten metals or chemical reactants due to their advantages of high temperature resistance, high thermal conductivity, and non-deformation. However, while tungsten is excellent in terms of physical properties, its chemical stability is affected by a variety of factors, such as temperature, atmosphere, and contact substances. Therefore, it is of…

Tungsten is widely used in industrial scenarios such as high-temperature metallurgy, crystal growth, and vacuum smelting due to its ultra-high melting point, excellent high-temperature resistance and chemical stability. Especially in the preparation of molybdenum, titanium, rare earth and other active metal materials, tungsten crucible has become an ideal container material because it is not easy to react with the melt and can withstand extreme thermal stress. At present, W crucibles are mainly prepared by powder metallurgy method, which can not…

Due to its extremely high melting point, excellent high-temperature mechanical properties and good chemical stability, tungsten crucible is widely used in high-temperature experiments in aerospace, metallurgy, materials science and other fields, especially in crystal growth, metal smelting and rare element extraction, etc., which plays a key role. However, in the actual use process, tungsten crucibles are not “indestructible”, and will still fail in different forms due to a variety of complex factors. First, thermal fatigue cracking is one of the…

As a metal with a high melting point, tungsten is widely used in high-temperature smelting, single crystal growth, vacuum evaporation and other industrial fields due to its excellent thermal stability, corrosion resistance and high strength. As an important vessel carrying high-temperature materials, the surface condition of tungsten crucible has a direct impact on service life, product purity and operation efficiency. Therefore, the surface treatment technologies for W crucibles have attracted extensive attention in recent years, and a variety of targeted…