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Isostatic Hot Pressed W-Cu Composites with Nanosized Grain Boundaries: Microstructure, Structure and Radiation Shielding Efficiency against Gamma Rays

Nanomaterials (Basel, Switzerland), 2022-05, Vol.12 (10), p.1642 [Peer Reviewed Journal]

2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2022 by the authors. 2022 ;ISSN: 2079-4991 ;EISSN: 2079-4991 ;DOI: 10.3390/nano12101642 ;PMID: 35630865

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Title:
Isostatic Hot Pressed W-Cu Composites with Nanosized Grain Boundaries: Microstructure, Structure and Radiation Shielding Efficiency against Gamma Rays
Author: 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
Subjects: Additive manufacturing ; Alloys ; Boundaries ; Chemical composition ; Chemical reactions ; Composite materials ; Copper ; Crystallites ; Crystals ; Density ; Efficiency ; Gamma rays ; Grain boundaries ; High temperature ; Hot pressing ; isostatic hot pressing ; Methods ; Microstructure ; Powder metallurgy ; Radiation ; Radiation protection ; Radiation shielding ; Sintering ; structure ; Tungsten ; tungsten–copper composite ; γ Radiation
Is Part Of: Nanomaterials (Basel, Switzerland), 2022-05, Vol.12 (10), p.1642
Description: 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.
Publisher: Switzerland: MDPI AG
Language: English
Identifier: ISSN: 2079-4991
EISSN: 2079-4991
DOI: 10.3390/nano12101642
PMID: 35630865
Source: PubMed Central
ROAD: Directory of Open Access Scholarly Resources
ProQuest Central
DOAJ Directory of Open Access Journals

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Isostatic Hot Pressed W-Cu Composites with Nanosized Grain Boundaries: Microstructure, Structure and Radiation Shielding Efficiency against Gamma Rays

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