In this study, slag penetration into a magnesia refractory monolithic was investigated by the crucible test method. A synthetic calcium aluminate slag system has been used to study commercial magnesia mix refractory for 1, 2, 3, 4, 5 and 6 hours at 1450°C and 1600°C. It has been shown that the penetration rate is controlled by a diffusion mechanism at 1450°C. In this case, capillaries are the ...

Introduction: Chondrites are known to contain varying proportions of chondrules, matrix, refractory inclusions and metal. Although trends are known to exist among the chondrite groups (e.g. [1]), their significance has seldom been discussed and no global understanding exists to date concerning the relationship between chondrite groups. Here we show that the relative abundances of the various pe...

Progress continued on method development for the dissolution of difficult-to-dissolve materials, the automated analysis of plutonium and uranium, the preparation of plutonium materials for the Safeguard Analytical Laboratory Evaluation (SALE) Program, and the analysis of HTGR fuel and SALE uranium materials. The previously developed Teflon-container, metal-shell apparatus was applied to the dis...

The refractory HEAs block material was prepared by powder sintering, using an equal atomic proportion of mixed TiZrNbMoV and NbTiAlTaV metal raw materials. phase analyzed, XRD. microstructure the specimen observed, employing a scanning electron microscope, compressive strength measured, electronic universal testing machine. results showed that bulk cubic alloy structure obtained sintering at 13...

A predictive analytical model for the thermal conductivity of Aluminum/transition metal based high-entropy alloys on contributions from electron and lattice subsystems is presented. Lattice modeled as an oscillator damped by electron-phonon defect scattering. Electron subsystem dominated scattering aperiodic crystal potential arising alloying atom induced disorder; its effect was quantitatively...

Field-assisted sintering technique (FAST) is used for the preparation of Nb–Al2O3 composite materials. The electrical conductivity investigated depending on particle size starting powders and under varying volume contents refractory metal in powder mixture. percolation threshold found to be influenced not only by fraction but also alumina sample preparation. For fine- coarse-grained alumina, a ...

Abstract We propose a wide-angle metamaterial absorber with more than 90% absorption in the far-infrared (F-IR) and terahertz (THz) regimes. Our metal-dielectric consists of phase change layer (Ge 2 Sb Te 5 ), dielectric spacer (MgF bottom refractory metal (TiN). numerically designed structure by finite-difference time-domain simulation method demonstrated perfect spectral range from 10 μ m to ...

Modern applications of refractory ceramic thin films, predominantly as wear-protective coatings on cutting tools and on components utilized in automotive engines, require a combination of excellent mechanical properties, thermal stability and oxidation resistance. Conventional design approaches for transition metal nitride coatings with improved thermal and chemical stability are based on alloy...

patients with acute myeloblastic leukemia (aml) with monosomy 7 are a group of patients with refractory aml who have a very poor prognosis. therefore, rationally designed new therapies, including metronomic chemotherapy regimen with histidine deacetylase inhibitors (valporic acid, atra) are being investigated as potential treatments for the population of refractory cases of aml. herein, we repo...

Molybdenum (Mo), a bcc metal with a melting point of 2,610°C and a density of 10.22 g/cm, is an important refractory metal. The refractory properties of molybdenum reflect the high strength of interatomic bonding resulting from the overlap of the 4d-orbitals and the number of bonding electrons available (1). The melting point of molybdenum is exceeded only by those of tungsten and tantalum, amo...