Boron-Nitride–Coated Nuclear Fuels

Gündüz, Güngör; Uslu, İbrahım; Durmazuçar, Hasan H.

doi:10.13182/nt96-a35313

Cited by 11 publications

(2 citation statements)

References 30 publications

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“…The desirable properties of BN, either in hexagonal or pyrolitic form, have been exploited in a variety of applications, including corrosion-resistant coatings and ceramic components, debonding layers in ceramic-matrix composite materials, , and coatings on nuclear fuel elements . In the majority of these applications, BN is deposited via chemical vapor deposition (CVD) processes in which the precursors of choice are boron trichloride and ammonia .…”

Section: Introductionmentioning

confidence: 99%

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

McDaniel

Allendorf

1998

J. Phys. Chem. A

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The reaction between BCl 3 and NH 3 to produce dichloroboramine (Cl 2 BNH 2 ) and HCl was probed using a flow-tube reactor interfaced to a molecular-beam mass-sampling system. A composite method that couples the detailed simulation of the fluid mechanics and chemical reactions occurring in the flow tube to an algorithm for nonlinear least-squares optimization was used to extract the kinetic parameters from the experiment. The rate constant for this gas-phase reaction is k (cm 3 mol -1 s -1 ) ) 4.21 × 10 11 exp[-(8350 cal mol -1 )/(RT)] with an estimated uncertainty of 10-15% over the temperature range 670-920 K. The results indicate that surface reactions involving BCl 3 and NH 3 occur in the flow tube, but their contributions to the observed chemical behavior of the system can be quantified and therefore do not affect the kinetic measurements reported here. In addition, the low-energy barrier to this gas-phase reaction has important implications for the chemical vapor deposition of boron nitride from BCl 3 and NH 3 .

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Section: Introductionmentioning

confidence: 99%

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

McDaniel

Allendorf

1998

J. Phys. Chem. A

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“…Pure boron thin films are used as materials in electronic [7] and optical devices [8] as well as in protective layers of thermonuclear installations [9]. Moreover, boron coatings of monoisotopic compositions find applications in the nuclear industry; for example, 10 B-based coatings are promising as burnable neutron absorbers in nuclear reactors [10] and as absorber coatings of neutron detectors [11]; they are also used for the delivery of 10 B atoms deposited on the surface of nanosized particles to the malignant neoplasm during boron neutron capture therapy [12], while 11 B-based coatings are used for the 11 B aneutronic fusion of protons and 11 B atomic nuclei, which may be an alternative to deuterium and tritium fusion [13]. Hence, developing techniques to deposit boron coatings, investigating the properties of boron coatings, and revealing the interrelationship between these properties and conditions that brought about their formation are crucial.…”

Section: Introductionmentioning

confidence: 99%

Electron-Beam Synthesis and Modification and Properties of Boron Coatings on Alloy Surfaces

et al. 2022

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In this study, fore-vacuum plasma electron beam sources were used to deposit a few micron-thick boron coatings on A284 and ZrNb1 alloys and modify their surfaces. The coating deposition rate with a continuous 1 kW electron beam that evaporated the boron target at a distance of 10 cm was 0.5 µm/min, and the boron coating density was 2.2 g/cm3. Based on the comparison of data on the mass-to-charge composition, beam plasma density, and coating parameters, the contribution of the plasma phase of the evaporated material to the growth of coatings was greater than that of the vapor phase. Using the scanning electron and atomic force microscopy techniques, surface modification by repeated electron beam pulses with electron energies of 8 and 6 keV and a beam power per pulse of 2 J/cm2 and 2.25 J/cm2, respectively, transformed a relatively smooth coating surface into a hilly structure. Based on a structural phase analysis of coatings using synchrotron radiation, it was concluded that the formation of the hilly coating structure was due to surface melting under the repeated action of electron beam pulses. The microhardness, adhesion, and wear resistance of coatings were measured, and their corrosion tests are presented herein. The pure boron coatings obtained and studied are expected to be of use in various applications.

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Sintering trials and microstructural changes mechanism of analogues of americium oxides for radioisotope power systems

Chen,

Lv,

et al. 2024

Ceramics International

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Boron-Nitride–Coated Nuclear Fuels

Cited by 11 publications

References 30 publications

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Electron-Beam Synthesis and Modification and Properties of Boron Coatings on Alloy Surfaces

Sintering trials and microstructural changes mechanism of analogues of americium oxides for radioisotope power systems

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Boron-Nitride–Coated Nuclear Fuels

Cited by 11 publications

References 30 publications

Flow-Tube Investigation of the High-Temperature Reaction between BCl3 and NH3

Flow-Tube Investigation of the High-Temperature Reaction between BCl3 and NH3

Electron-Beam Synthesis and Modification and Properties of Boron Coatings on Alloy Surfaces

Sintering trials and microstructural changes mechanism of analogues of americium oxides for radioisotope power systems

Contact Info

Product

Resources

About

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃

Flow-Tube Investigation of the High-Temperature Reaction between BCl₃ and NH₃