2012年12月19日星期三

Tungsten Alloy for Protection against X-rays and Gamma Radiation

Tungsten Alloy for Protection against X-rays and Gamma Radiation
The tungsten alloy reliably shields against X-rays and gamma radiation. With its new production process and great expertise in the materials field, PLANSEE has made the manufacture of shielding components particularly cost-effective.
Whether in the world of medical or industrial X-ray technology, radiotherapy or nuclear power stations: Wherever high-energy radiation is used, it is vital to protect people against it.
The denser the material, the better able it is to protect from radiation. That is why heavy elements absorb X-rays and gamma radiation particularly well. Lead is still the most frequently used shielding material. Because it is a very soft material, it is mostly used only in combination with support structures made of steel.
Lead is a toxic material that is harmful to the environment and humans. The onerous recycling process makes lead expensive despite the low initial procurement costs. Many enterprises are therefore looking for a suitable alternative for providing reliable radiation protection.
Combines shielding properties with excellent machinability
The density of tungsten is 60 percent higher than that of lead. That is why even thinner layers of tungsten are able to provide reliable shielding against radiation.
The tungsten alloy is particularly suitable as a shielding material. It consists of tungsten and a small proportion of nickel-iron. Like tungsten, the material has excellent shielding properties. However, it is also considerably more ductile than tungsten and can therefore be machined better.
Thanks to the ductility and high melting point of the material, isotope containers made from are also able to withstand extreme mechanical and thermal loads.
Because of their high strength, components act as both the support structure and the shielding in one. Unlike when lead is used, no additional steel support structures are required.

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