Cost Efficiency of Tungsten Heavy Alloy for Collimator

Due to the excellent shielding against electromagnetic radiation, tungsten based materials are typically used for collimators components in medical imaging diagnostics. However, the conventional manufacturing of pure tungsten sheet and foil material is quite expensive because of high temperature sintering and thermo-mechanical treatment.

A cost and material efficient manufacturing for tungsten based material has been developed. The new technology uses dedicated mixtures of tungsten heavy alloy powder and organic binder, which are formed and sintered to full-metallic semi-finished products. Due to the tungsten content of ≥ 90 wt.% the material exhibits excellent X-ray absorption. Furthermore the full-metallic material overcomes possible drawbacks of tungsten filled polymers with respect to aging and degradation under X-ray radiation. Sheets up to 4mm thickness and foils down to below 100μm can be produced in tight tolerances. The isotropic microstructure allows the forming of structural parts by roll bending and deep-drawing technologies.

In comparison to the conventional powder metallurgical fabrication of tungsten and tungsten alloy sheets, producing by pressing, sintering several rolling steps and thermal treatments, the new technology enables a nearly 100% material yield and further the saving of expensive thermo-mechanical processing steps. Material and cost efficient manufacturing route for tungsten heavy alloy foil and sheet material for collimators was developed. The technology established is the metal extrusion moulding where dedicated mixtures of tungsten heavy alloy powder and organic binder are formed and sintered to full-metallic semi-finished products.

  Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online- http://www.tungsten-alloy.com
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