Abstract Metal-bonded grinding tools are commonly based on copper as bond material and possess low porosity. The powder metallurgic fabrication the applied process parameters have a high influence mechanical properties of these layers. In this study, Cu–diamond composites fabricated through Field Assisted Sintering Technology with variation holding time, temperature, pressure, chromium particle...

Al-Cr and Al-Cr-Si composite cathodes were obtained by the hot compaction of aluminum, chromium, silicon powder mixtures. The phase transformations in surface layer subjected to arc heating considered. elemental compositions modified cathodes’ surfaces studied using X-ray diffraction, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS). effect addition on structural evoluti...

This study included the process of adsorption some inorganicelements known as environmental risk (Cd, Cr, Cb, Pb) its watersolutions on surface activated charcool to ceratonia siliqua . Thepercentage and isothermal curves werecalculated according equation, well effect temperature , pHand particle size adsorbent these elements. Thestudy comparative with naturalceratonia powder. The results showe...

Abstract In this paper, thermodynamic modeling of a powder self-fluxing material PGSR-2 based on nickel (wt. %): Ni-79.3, C-0.5, Cr-15, Si-3.2, B–2 was carried out. The simulation performed in the temperature range 300-6000 K atmosphere “92 vol. % air + 8 propane” at total pressure P = 10 5 Pa. dependences equilibrium composition condensed and gas phases formed during heating are calculated.

Background: Chromium (Cr), a naturally occurring heavy metal, exists in many states, but the trivalent Cr (III) and hexavalent Cr (VI) forms are the most common in the environment. Acute and chronic toxicity in both animal and man are mainly caused by Cr (VI) compounds. Studies on hematological parameters in sub-acute toxicity of potassium chromate in broiler chicks are limited. Aims & Objectiv...

We report on the synthesis of computationally predicted out-of-plane chemically ordered transition metal borides labeled o-MAB phases, Ta4M″SiB2 (M″ = V, Cr), and a structurally equivalent disordered solid solution MAB phase Ta4MoSiB2. The boride phases were prepared using solid-state reaction sintering constituting elements. High-resolution scanning transmission electron microscopy along with ...