Gamma Ray Shielding Material: W90Ni10 Alloy

Many medical devices use gamma rays to treat tumors. In order to perform accurate radiotherapy and reduce the damage of radiation to patients, gamma ray shielding materials are necessary. Tungsten alloy such as W90Ni10 alloy is a kind of γ-ray shielding material with good absorption to gamma rays.

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At present, the most commonly used γ-ray shielding materials are lead alloys, but lead alloys have secondary toughening radiation and are toxic, so their application is limited to a certain extent. Tungsten alloy such as W90Ni10 alloy is a non-toxic, environmentally-friendly gamma ray shielding material.

Currently, tungsten-based alloys are mostly prepared by powder metallurgy, but powder metallurgy requires the use of molds and has strict requirements on the purity and particle size of powder. In this regard, some experts have proposed a liquid phase sintering method combining hydrogen furnace and laser sintering to prepare W90Ni10 alloy without using molds at a faster speed, which has very important practical significance for preparation of tungsten alloys.

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