2020
DOI: 10.1016/j.jnucmat.2020.152297
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Microstructural evolution of Mo-UO2 cermets under high temperature hydrogen environments

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Cited by 22 publications
(11 citation statements)
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“…In Equation ( 4), ρ i are the theoretical densities of the constituent phases (Mo, W, and HfN), and V i are the constituent volume fractions. The theoretical and bulk densities were 13.46 and 11.766 g/cm 3 , respectively. The bulk density was 88.7% of the theoretical density.…”
Section: Methodsmentioning
confidence: 94%
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“…In Equation ( 4), ρ i are the theoretical densities of the constituent phases (Mo, W, and HfN), and V i are the constituent volume fractions. The theoretical and bulk densities were 13.46 and 11.766 g/cm 3 , respectively. The bulk density was 88.7% of the theoretical density.…”
Section: Methodsmentioning
confidence: 94%
“…The thermal conductivity obtained from a semiempirical calculation using data from the laser flash method, CTE measurements, and the ROM-specific heat capacity was roughly constant, with the mean, about 47 W/(m K), varying by less than one standard error within the temperature range 200-1400 • C. The Bruggemann model showed reasonable quantitative agreement with the semiempirical data, falling within a standard deviation of the measured values. The bulk density was 11.77 g/cm 3 , or 88.6% of the theoretical density (13.46 g/cm3…”
mentioning
confidence: 87%
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“…In general, reduced hydrogen ingress into carbon fuel elements, along with reduced property mismatching in the materials, could improve component lifetime and overall performance. Another fuel option being studied for use in NTP systems is W/UO 2 and Mo/UO 2 ceramic metal (CERMET) fuel, which must be able to operate in excess of 2700 K while remaining compatible with the H 2 propellant . Thermal and chemical extremes can induce undesirable effects in CERMET fuel, such as cracking of fuel pellets, swelling, and migration of uranium into the surrounding fuel matrix.…”
Section: Tbc Applicationsmentioning
confidence: 99%
“…Another fuel option being studied for use in NTP systems is W/UO 2 and Mo/UO 2 ceramic metal (CERMET) fuel, which must be able to operate in excess of 2700 K while remaining compatible with the H 2 propellant. 142 Thermal and chemical extremes can induce undesirable effects in CERMET fuel, such as cracking of fuel pellets, swelling, and migration of uranium into the surrounding fuel matrix. Certain CERMET designs that employ an aluminum cladding around the bulk fuel in addition to interfacial barrier coatings between the fuel and cladding have been developed to reduce the irradiationinduced diffusion between U and Al, which creates a diffusion layer identified as a cause of structural failure in these fuels.…”
Section: Tbc Applicationsmentioning
confidence: 99%