Experimental features and radiation shielding performances of newly produced Ni-based superalloys.

In the study, four novel Ni-based superalloys were produced and radiation shielding efficiencies of the alloys were investigated. Ni, Fe, Mo, Cr, Ta and W were selected for developing NiyTaxW7Cr7Fe7Mo7B7 (x = 0–20; y = 65–45%) alloys based on Ni. Phy-X/PSD code was used to calculate the attenuation parameters. Results were compared by XCom and some reported values in the literature for a meaningful evaluation. In addition, experimental results were provided based on x-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and electron paramagnetic resonance spectroscopic techniques. It is obtained that the crystallite sizes of the alloys calculated based on the Debye Scherrer equation vary between 44.13 and 68.33 nm. The mapping images and EDS analysis indicate that the Ni3 alloy has the most homogeneous structure. There is a direct relation between the amount of Ta and the radiation protection capability of the alloys. Newly fabricated Ni-based superalloys have good shielding properties and the usability of the alloys can be recommended as effective shielding materials in radiation-related applications. [ABSTRACT FROM AUTHOR]