Tishkevich Daria I, Zubar Tatiana I, Zhaludkevich Alexander L, Razanau Ihar U, Vershinina Tatiana N, Bondaruk Anastasia A, Zheleznova Ekaterina K, Dong Mengge, Hanfi Mohamed Y, Sayyed M I, Silibin Maxim V, Trukhanov Sergei V, Trukhanov Alex V
Laboratory of Magnetic Films Physics, SSPA "Scientific and Practical Materials Research Centre of NAS of Belarus", P. Brovki Str. 19, 220072 Minsk, Belarus.
Laboratory of Single Crystal Growth, South Ural State University, Lenin Ave. 76, 454080 Chelyabinsk, Russia.
Nanomaterials (Basel). 2022 May 11;12(10):1642. doi: 10.3390/nano12101642.
The W-Cu composites with nanosized grain boundaries and high effective density were fabricated using a new fast isostatic hot pressing method. A significantly faster method was proposed for the formation of W-Cu composites in comparison to the traditional ones. The influence of both the high temperature and pressure conditions on the microstructure, structure, chemical composition, and density values were observed. It has been shown that W-Cu samples have a polycrystalline well-packed microstructure. The copper performs the function of a matrix that surrounds the tungsten grains. The W-Cu composites have mixed bcc-W (sp. gr. Im 3¯ m) and fcc-Cu (sp. gr. Fm 3¯ m) phases. The W crystallite sizes vary from 107 to 175 nm depending on the sintering conditions. The optimal sintering regimes of the W-Cu composites with the highest density value of 16.37 g/cm were determined. Tungsten-copper composites with thicknesses of 0.06-0.27 cm have been fabricated for the radiation protection efficiency investigation against gamma rays. It has been shown that W-Cu samples have a high shielding efficiency from gamma radiation in the 0.276-1.25 MeV range of energies, which makes them excellent candidates as materials for radiation protection.
采用一种新型快速等静压热压法制备了具有纳米尺寸晶界和高有效密度的W-Cu复合材料。与传统方法相比，提出了一种显著更快的制备W-Cu复合材料的方法。观察了高温和高压条件对微观结构、结构、化学成分和密度值的影响。结果表明，W-Cu样品具有多晶紧密堆积的微观结构。铜起到包围钨晶粒的基体作用。W-Cu复合材料具有混合的体心立方-W（空间群Im 3¯ m）和面心立方-Cu（空间群Fm 3¯ m）相。W微晶尺寸根据烧结条件在107至175nm之间变化。确定了密度值最高为16.37g/cm的W-Cu复合材料的最佳烧结制度。制备了厚度为0.06-0.27cm的钨铜复合材料用于γ射线辐射防护效率研究。结果表明，W-Cu样品在0.276-1.25MeV能量范围内对γ辐射具有高屏蔽效率，这使其成为辐射防护材料的优秀候选者。
