The Oxidation of Uranium Diboride in Flowing Air Atmospheres

Q. Mistarihi; F. Martini; J. Buckley; S. Middlebough; T. J. Abram; J. Turner

doi:10.1016/j.jnucmat.2023.154417

The Oxidation of Uranium Diboride in Flowing Air Atmospheres

Q. Mistarihi, F. Martini, J. Buckley, S. Middlebough , T. J. Abram, J. Turner

Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The air oxidation behaviour of UB2 synthesized via the carbo/borothermic reaction has been investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), through heating ramp and isothermal studies. Heating ramps from room temperature up to 1173 K showed an on-set of rapid oxidation occurred at a temperature of 807 ± 6 K for samples in fragment form and 799 ± 5 K for finely powdered material. The ramp tests yielded UB2O6 as the ultimate oxidation product. A thermodynamic model for the U-B-O system was used to propose a reaction pathway for the oxidation process in excess oxidiser condition and to predict the amount of heat released. The predictions of the model agreed with the observed phenomena and with the values measured via DSC.

Original language	English
Number of pages	12
Journal	Journal of Nuclear Materials
Volume	580
Issue number	154417
DOIs	https://doi.org/10.1016/j.jnucmat.2023.154417
Publication status	Published - 1 Jul 2023

Keywords

Nuclear fuel
Oxidation
Uranium

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title = "The Oxidation of Uranium Diboride in Flowing Air Atmospheres",

abstract = "The air oxidation behaviour of UB2 synthesized via the carbo/borothermic reaction has been investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), through heating ramp and isothermal studies. Heating ramps from room temperature up to 1173 K showed an on-set of rapid oxidation occurred at a temperature of 807 ± 6 K for samples in fragment form and 799 ± 5 K for finely powdered material. The ramp tests yielded UB2O6 as the ultimate oxidation product. A thermodynamic model for the U-B-O system was used to propose a reaction pathway for the oxidation process in excess oxidiser condition and to predict the amount of heat released. The predictions of the model agreed with the observed phenomena and with the values measured via DSC. ",

keywords = "Nuclear fuel, Oxidation, Uranium",

author = "Q. Mistarihi and F. Martini and J. Buckley and S. Middlebough and Abram, {T. J.} and J. Turner",

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TY - JOUR

T1 - The Oxidation of Uranium Diboride in Flowing Air Atmospheres

AU - Mistarihi, Q.

AU - Martini, F.

AU - Buckley, J.

AU - Middlebough , S.

AU - Abram, T. J.

AU - Turner, J.

PY - 2023/7/1

Y1 - 2023/7/1

N2 - The air oxidation behaviour of UB2 synthesized via the carbo/borothermic reaction has been investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), through heating ramp and isothermal studies. Heating ramps from room temperature up to 1173 K showed an on-set of rapid oxidation occurred at a temperature of 807 ± 6 K for samples in fragment form and 799 ± 5 K for finely powdered material. The ramp tests yielded UB2O6 as the ultimate oxidation product. A thermodynamic model for the U-B-O system was used to propose a reaction pathway for the oxidation process in excess oxidiser condition and to predict the amount of heat released. The predictions of the model agreed with the observed phenomena and with the values measured via DSC.

AB - The air oxidation behaviour of UB2 synthesized via the carbo/borothermic reaction has been investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), through heating ramp and isothermal studies. Heating ramps from room temperature up to 1173 K showed an on-set of rapid oxidation occurred at a temperature of 807 ± 6 K for samples in fragment form and 799 ± 5 K for finely powdered material. The ramp tests yielded UB2O6 as the ultimate oxidation product. A thermodynamic model for the U-B-O system was used to propose a reaction pathway for the oxidation process in excess oxidiser condition and to predict the amount of heat released. The predictions of the model agreed with the observed phenomena and with the values measured via DSC.

KW - Nuclear fuel

KW - Oxidation

KW - Uranium

U2 - 10.1016/j.jnucmat.2023.154417

DO - 10.1016/j.jnucmat.2023.154417

M3 - Article

SN - 0022-3115

VL - 580

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 154417

ER -

The Oxidation of Uranium Diboride in Flowing Air Atmospheres

Abstract

Keywords

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