Processing and properties of boron carbide (B4C) reinforced LDPE composites for radiation shielding

Avcıoğlu, Suna; Buldu, Merve; Kaya, Figen; Üstündağ, Cem Bülent; Kam, Erol; Menceloǵlu, Yusuf́ Z.; Kaptan, H. Yilmaz; Kaya, Cengiz

doi:10.1016/j.ceramint.2019.08.268

Cited by 57 publications

(29 citation statements)

References 29 publications

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“…To obtain boron carbide particles with tailored morphologies, a non-catalytic sol–gel route that was previously reported by our group was modified [ 37 , 38 , 39 ]. Analytical grade glycerin (C 3 H 8 O 3 ), tartaric acid (C 4 H 6 O 6 ), and boric acid (H 3 BO 3 ) were obtained from Merck and used without further purification.…”

Section: Methodsmentioning

confidence: 99%

Boron Carbide as an Electrode Material: Tailoring Particle Morphology to Control Capacitive Behaviour

et al. 2023

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In this study, boron carbide powders consisting mainly of nano/micro fibers or polyhedral-equiaxed particles were synthesized via the sol–gel technique, and the influence of particle morphology on electrochemical performance of boron carbide electrodes was investigated. Thermal decomposition duration of the precursors played a determinant role in the final morphology of the synthesized boron carbide powders. The morphology of boron carbide powders successfully tuned from polyhedral-equiaxed (with ~3 µm average particle size) to nano/micro fibers by adjusting the thermal decomposition duration of precursors. The length and thickness of fibers were in the range of 30 to 200 µm and sub-micron to 5 µm, respectively. The electrochemical performance analysis of boron carbide powders has shown that the particle morphology has a considerable impact on the boron carbide electrodes electrochemical performance. It was found that the synergetic effects of polyhedral-equiaxed and nano/micro fiber morphologies exhibited the best electrochemical performance in supercapacitor devices, resulting in the power and energy density of 34.9 W/kg and 0.016 Wh/kg, respectively.

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Section: Methodsmentioning

confidence: 99%

Boron Carbide as an Electrode Material: Tailoring Particle Morphology to Control Capacitive Behaviour

et al. 2023

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“…Recent studies focused on high-and low-density polyethylene composites reinforced with elemental boron, 23,24 boric acid, 25 boron carbide, 26 and boron nitride 18,27,28 as additives in the polymer matrix to produce panels for radiation shielding. However, there is little research on the production of lightweight and flexible composites that could be utilized in small-scale fusion reactors and wearable shielding by incorporating elemental boron particles in the electrospun polymer nanofibers.…”

Section: Introductionmentioning

confidence: 99%

Boron‐containing nonwoven polymeric nanofiber mats as neutron shields in compact nuclear fusion reactors

Özcan

Kam

Kaya

et al. 2022

Intl J of Energy Research

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Summary Composite materials that contain thermally and chemically stable boron compounds are attractive candidates for applications that require high neutron absorption due to the large neutron absorption cross‐section of boron. Electrospun polymer nanofibers have a unique volume‐to‐surface area, incorporating carbon and hydrogen atoms in their molecular structure that could moderate and thermalize incident neutrons. Nonwoven nanofibers could in turn reduce neutron scattering and increase neutron absorption by providing large surfaces and better atom economy in the shield materials. The expected high absorption will result from improved neutron interaction with high neutron absorbance hydrogen, carbon, and boron atoms in the nanofibers through increased specific surface area and atom economy. In this work, elemental boron‐doped PVA polymeric nanofibers are produced for the first time to date for the application of neutron shielding. With the increasing demand for nuclear power generation and radiation therapies in medicine, the need for producing lightweight and flexible materials that could replace the traditional heavy metal/metal carbide‐based shields is vital. Similarly, the need for flexible materials that could shield neutrons is also becoming critical for aerospace applications. The effect of boron content on the quality of fibers and neutron shielding capacity is evaluated by using an Am‐Be neutron source. Characterization studies of produced nanofibers were carried out by SEM, TGA, FT‐IR, and XPS analyses. Results have shown that PVA‐based nanofibers doped with wt% 0.1 to 0.5 boron, having fiber diameter distribution between 60 and 330 nm range, could absorb up to 6% of neutron flux.

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“…Boron carbide has interesting combination of properties such as high melting point (2445 °C), low density (2.5 g/cm 3 ), high hardness, good resistance against chemical agents, high wear resistance, good modulus of elasticity, high neutron absorption and high impact resistance [1][2][3][4]. This material is widely used in industry and has become one of the most important and strategic engineering ceramics [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Performance of glucose, sucrose and cellulose as carbonaceous precursors for the synthesis of B4C powders

et al. 2022

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Boron carbide is the third hardest material in the world after diamond and cubic boron nitride, which is one of the most strategic engineering ceramics in various industrial applications. The aim of this research is to synthesize B4C by reacting boric acid as boron source with polymers from the saccharide family as carbon sources, and to determine the best saccharide as precursor. For this purpose, glucose (monosaccharide), sucrose (disaccharide), and cellulose (polysaccharide) were used and examined. The samples were prepared by appropriate mixing of the starting materials, pyrolysis at 700 °C, and synthesis at 1500 °C. The results of Fourier transform infrared (FT-IR) spectroscopy and X-ray diffractometry (XRD) showed that among the studied saccharide polymers, glucose is the best carbon source candidate for the synthesis of B4C. To describe precisely, the specimen prepared with glucose and boric acid had more boron carbide and less hydrocarbon.

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Processing and properties of boron carbide (B4C) reinforced LDPE composites for radiation shielding

Cited by 57 publications

References 29 publications

Boron Carbide as an Electrode Material: Tailoring Particle Morphology to Control Capacitive Behaviour

Boron Carbide as an Electrode Material: Tailoring Particle Morphology to Control Capacitive Behaviour

Boron‐containing nonwoven polymeric nanofiber mats as neutron shields in compact nuclear fusion reactors

Performance of glucose, sucrose and cellulose as carbonaceous precursors for the synthesis of B4C powders

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