High-temperature compressive creep tests of U3Si2 with spark plasma sintering: Experiments and finite element modeling

Gong, Bowen; Zhao, Dong; Broussard, Andre; Harp, Jason; Nelson, Andrew T.; Lian, Jie

doi:10.1016/j.jnucmat.2022.153568

Cited by 4 publications

(3 citation statements)

References 41 publications

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“…Past work has shown strong agreement between SPS creep testing and conventional creep testing for various metals and ceramics such as alumina oxide, copper, and U 3 Si 2 . 16,[27][28][29]…”

Section: Compressive Creep Testing Using Sps Apparatusmentioning

confidence: 99%

Uniaxial compressive creep tests by spark plasma sintering of 70% theoretical density α-uranium and U-10Zr

Fay,

Lemma,

Capriotti

et al. 2024

Journal of Applied Physics

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Metallic fuels hold numerous advantages over conventional uranium dioxide fuels and are a key component of several liquid metal-cooled advanced reactor concepts including sodium fast reactors. These fuels undergo rapid swelling during early burnup; consequently, they spend most of their reactor lifetime in a porous state. The presence of this porosity alters many of the mechanical properties of the fuel including creep impacting fuel deformation during axial swelling. This work investigates the creep behavior of the porous fuel using a spark plasma sintering technique. Creep tests were performed for the first time on porous α-phase uranium and uranium with 10 wt. % zirconium (U-10Zr) samples. The samples of α-phase uranium and U-10Zr were fabricated from depleted uranium by spark plasma sintering and subjected to uniaxial compressive creep testing. Calculated stress exponents were found to be 2.6±1.6 and 5.7±1.4 for α-U and U-10Zr, respectively, and calculated activation energies were found to be 61.6±1.1kJ/mol for α-U. The creep data were also used to evaluate existing porosity inclusive in creep models.

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“…Past work has shown strong agreement between SPS creep testing and conventional creep testing for various metals and ceramics such as alumina oxide, copper, and U 3 Si 2 . 16,[27][28][29]…”

Section: Compressive Creep Testing Using Sps Apparatusmentioning

confidence: 99%

Uniaxial compressive creep tests by spark plasma sintering of 70% theoretical density α-uranium and U-10Zr

Fay,

Lemma,

Capriotti

et al. 2024

Journal of Applied Physics

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“…(1) The cook initially grew in the cracks of Cr 2 O 3 oxide film, which promoted the expansion of cracks, and then accelerated Cr 2 O 3 spalling. (2) The thickening of the coke layer increased the carbon activity and decreased the partial pressure of oxygen, and eventually Cr 2 O 3 reacted with the coke body to form a layer of Cr 3 C 2 carbide layer (6Cr 2 O 3 +8C→4Cr 3 C 2 +9O 2 ). Due to the different specific volume and thermal expansion coefficient, there was internal stress in the Cr 3 C 2 carbide layer, which was easy to destroy and flake in a short time.…”

Section: Edx Analysismentioning

confidence: 99%

“…Nowadays, the commonly used furnace tube materials were 25Cr20Ni, 25Cr35Ni and 35Cr45Ni, among which 35Cr45Ni steel had the highest service temperature, about 1150℃ [2]. As well known, the structure of furnace tube material will change greatly after it was in service for a long time at high temperature, which will affect its service life.…”

Section: Introductionmentioning

confidence: 99%

Investigation on failure of 35Cr45Ni steel at high temperature

Yang

Han²,

Li³

et al. 2023

J. Phys.: Conf. Ser.

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The 35Cr45Ni steel with the high service temperature of about 1150°C was wildly used in ethylene pyrolysis device. However, the structure of 35Cr45Ni steel will change greatly after it was in service for a long time at high temperature. Therefore, in this paper, focusing on the 35Cr45Ni furnace tubes with different service time (0 and 6 years, i.e. original sample and failed sample), the microscopic morphology and elemental composition analysis were carried out to determine its failure behaviour. The results showed that the fracture morphology of the failed tube was mainly characterized by intergranular cracking, and there were carbides on the local surface of the crack, which was brittle cracking at low temperature. The precipitated phase in original 35Cr45Ni steel was mainly austenitic, M7C3 carbide and MC carbides. In a long-time service at 1000°C, the transformation of M7C3→M23C5 and MC(NbC)→Nb3Ni2Si occurred, and dispersed secondary M23C6 carbide was precipitated in the grain. Additionally, The NbC→Nb3Ni2Si transformation promoted the M7C3 to M23C5 process and the carbide precipitation as well as coarsening.

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Densification mechanism of U3Si2 consolidated by spark plasma sintering

Wang

Zhong

et al. 2023

Ceramics International

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High-temperature compressive creep tests of U3Si2 with spark plasma sintering: Experiments and finite element modeling

Cited by 4 publications

References 41 publications

Uniaxial compressive creep tests by spark plasma sintering of 70% theoretical density α-uranium and U-10Zr

Uniaxial compressive creep tests by spark plasma sintering of 70% theoretical density α-uranium and U-10Zr

Investigation on failure of 35Cr45Ni steel at high temperature

Densification mechanism of U3Si2 consolidated by spark plasma sintering

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