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자료유형
학술저널
저자정보
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11
발행연도
2021.11
수록면
4,820 - 4,830 (11page)
DOI
10.1007/s12540-020-00648-2

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Science and technology of materials are widely interested in the development of new alloys involving tungsten due to its largeapplicability to the domain of nuclear material transportation. Tungsten is a refractory material and it has many applicationsin the nuclear industry due to its mechanical properties and excellent cross-section for thermal neutrons, being widely usedfor shielding of high-energy radiation. Some of the main elements added to tungsten forming alloys are Nb, Cr, Cu, Fe, Ni,Mo, Co, Sn, Ti, and Ta, which are responsible for modifications of the physical and chemical properties of the resultingalloy, interfering on the attenuation of gamma radiation. The main goal of this paper is to present a refractory alloy based ontungsten with embedded infiltrating elements like copper (Cu) and nickel (Ni) and characterize the microstructural evolutionof different sintering process during its formation. Such a refractory alloy is submitted to the following characterization process:X-rays diffractometry, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electronmicroscopy, and energy dispersive spectroscopy. The diffractometry exhibit typical standard results for the precursor powders:W, Cu, and Ni demonstrating high degrees of purity accordingly to the crystallographic determined parameters. The TGAfor the powder W demonstrated thermal stability until 360 ºC, after an increase of mass due to the process of oxidation. The DSC analyze present two endothermal processes at temperatures 350 °C and 450 °C. The microstructural evolution ofWCuNi samples presents the absence of oxidation, homogeneous morphology and stability of the binary phase α?β (W andCuNi respectively) for different sintering. These results shall be taken into consideration for future works, particularly onthe study of shielding and gamma radiation attenuation.

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