Numerical Data on Specific Heat of Nonmetallic Solids

Touloukian, Y. S.; Buyco, E. H.

doi:10.1007/978-1-4757-6554-0_6

Cited by 108 publications

(128 citation statements)

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“…[32][33][34] Consequently, adopting constant values in the quenching simulations is an approximate and simplified assumption. The values used in the simulations are listed in Table 1.…”

Section: Materials Parametersmentioning

confidence: 99%

“…The values used in the simulations are listed in Table 1. [32][33][34] Precaution in numerical simulations should be made on the choice of the convective heat transfer coefficient h in thermal shock. The available data give scattering estimations of this parameter and the mutual deviation is high up to an order of magnitude (h ≈ 10 4 -10 5 W/(m 2 K)).…”

Section: Materials Parametersmentioning

confidence: 99%

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Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model

Song

Jiang

2013

Journal of the European Ceramic Society

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In this work, a non-local failure model was proposed and implemented into a finite element code. It was then used to simulate the crack evolution in ceramic materials subjected to thermal shock. By using this numerical model, the initiation and propagation of cracks in water quenched ceramic specimens were simulated. The numerical simulations reproduced faithfully the crack patterns in ceramic specimens underwent quenching tests. The periodical and hierarchical characteristics of the crack patterns were accurately predicted. The numerical simulations allow a direct observation on whole the process of crack initiation and growth, which is quite a difficult task in experimental studies. The failure mechanisms and the fracture procedure are discussed according to the numerical results obtained from the simulations. It is shown that the numerical model is simple, robust, accurate and efficient in simulating crack evolution in real structures under thermal shock.

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“…[32][33][34] Consequently, adopting constant values in the quenching simulations is an approximate and simplified assumption. The values used in the simulations are listed in Table 1.…”

Section: Materials Parametersmentioning

confidence: 99%

Section: Materials Parametersmentioning

confidence: 99%

Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model

Song

Jiang

2013

Journal of the European Ceramic Society

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“…Temperature dependence of carbon specific heat is taken from Ref. [7]. The consideration is limited to foil temperatures not exceeding 2500 K which means that foil failures due to evaporation are not taken into account [8].…”

Section: Stripping Foil Heatingmentioning

confidence: 99%

Modeling multiturn stripping injection and foil heating for high intensity proton drivers

Drozhdin

Rakhno

Striganov

et al. 2012

Phys. Rev. ST Accel. Beams

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H À stripping injection into the Fermilab recycler ring, combined with a beam phase painting technique, has been considered. The multiparticle three-dimensional beam dynamics with space charge has been studied numerically, using STRUCT and ORBIT codes, for different painting scenarios. In order to achieve a uniform (quasi-KV) phase-space distribution and to reduce the foil heating, the following parameters were investigated: the number of turns, strengths and temporal forms of kicker magnets, and foil geometry. Performance of the stripping foil is a crucial parameter of the whole injection scheme, so that the latter has been designed to minimize the hit number on the foil. The temperature regime has been evaluated both semianalytically and numerically using Monte Carlo codes MARS and MCNPX, with radiation cooling and transport of electrons taken into account. That all results agreed well proves the consistency of the models. It has been shown that the stripping foil can survive during injection with the parameters chosen for Project X at Fermilab.

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“…The specific heat capacity was calculated by the rule of mixtures using the specific heat capacity of MgO given by Touloukian 17 and the specific heat capacity of Nd 2 Zr 2 O 7 determined by Lutique. 8 The error in the thermal conductivity calculation is calculated by multiplying the percent of standard deviation by the thermal conductivity for each processing method.…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…It is expected that the dissolution of MgO in the boiling concentrated H 2 SO 4 is diffusion controlled, and is attributed to the high viscosity of the concentrated acid. 67,70 The reaction follows first order kinetics and the data points were fitted using first order equation as below: (17) where C is the concentration of ions in solution, t is dissolution time, C eq is a constant that represents the equilibrium concentration, and k is the reaction constant, indicating how fast the reaction reach equilibrium. Nd and Mg were fit to the first order dissolution equation and plotted in Figure 20(b).…”

Section: Dissolution Behavior Of Mgo-nd 2 Zr 2 O 7 Compositesmentioning

confidence: 99%

Neri Final Technical Report, De-Fc07-O5id14647, Optimization of Oxide Compounds for Advanced Inert Matrix Materials

Nino¹

2009

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The following is a technical report summarizing all the procedures, experiments, simulations and technical findings of this NERI project. For additional information, details or technical questions regarding this project, please contact jnino@mse.ufl.edu MgO and NDZ......................................................................69 8.4. Grain Size Dependence of MgO and NDZ Polycrystal Thermal Conductivity75 8.5 2009 Composite Processing and Characterization IntroductionIn order to reduce the current excesses of plutonium (both weapon grade and reactor grade) and other transuranium elements, a concept of inert matrix fuel (IMF) has been proposed for an uranium free transmutation of fissile actinides which excludes continuous uranium-plutonium conversion in thermal reactors and advanced systems. 1,2 Magnesium oxide (MgO) is a promising candidate for inert matrix (IM) materials due to its high melting point (2827 °C) 2 , high thermal conductivity (13 W/K·m at 1000 °C) 2 , good neutronic properties, and irradiation stability 3,4 However, MgO reacts with water and hydrates easily, which prevents it from being used in light water reactors (LWRs) as an IM. To improve the hydration resistance of MgO-based inert matrix materials, Medvedev 5 and coworkers have recently investigated the introduction of a secondary phase that acts as a hydration barrier. An MgO-ZrO 2 composite was specifically studied and the results showed that the composite exhibited improved hydration resistance than pure MgO. However, ZrO 2 is insoluble in most acids except HF, which is undesirable for fuel reprocessing. Moreover, the thermal conductivity of ZrO 2 is low and typically less than 3 W·m at 1000 °C. 6 In search for an alternative composite strategy, Nd 2 Zr 2 O 7 , an oxide compound with pyrochlore structure, has been proposed recently as a corrosion resistant phase, and MgO-Nd 2 Zr 2 O 7 composites have been investigated as potential IM materials. at 1000 °C for the MgO-Nd 2 Zr 2 O 7 composite with 90 vol% MgO was recently calculated and reported. 8,9 Other simulations proposed that the MgO-pyrochlore composites could exhibit higher radiation stability than previously reported. 10 Final optimization of the composite microstructure was performed on the 70 vol% MgONd 2 Zr 2 O 7 composite that burnup calculations had shown to have the closest profile to that of MOX fuel. Theoretical calculations also indicated that a homogeneous 70 vol% MgO composite could achieve the desired microstructure that would result in satisfying the dual requirements of good thermal properties. Experimental Procedures Composite Synthesis Solid State Synthesis of Nd 2 Zr 2 O 7Stoichiometric ratios of Nd 2 O 3 (Alfa Aesar 99.9%) and ZrO 2 (99.7%) were added to spherical 3 mm and 10 mm yttria stabilized zirconia (YSZ) milling media in a PTFE (polytetrafluoroethylene) ball mill jar with 100 ml of deionized water and 3 ml of ammonium polyacrylate dispersant (20 vol% Darvan 821A in deionized water). The slurry was milled for 24 hours on the ball mill at 85 rpm ...

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Numerical Data on Specific Heat of Nonmetallic Solids

Cited by 108 publications

References 0 publications

Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model

Direct numerical simulations on crack formation in ceramic materials under thermal shock by using a non-local fracture model

Modeling multiturn stripping injection and foil heating for high intensity proton drivers

Neri Final Technical Report, De-Fc07-O5id14647, Optimization of Oxide Compounds for Advanced Inert Matrix Materials

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