Magnetic order at room temperature induced by atomic lattice defects, like vacancies, interstitials or pairs of them, has been observed in a large number different nonmagnetic hosts, such as pure graphite, oxides and silicon-based materials. High Curie temperatures time independent magnetic response indicate the extraordinary robustness this new phenomenon solid state magnetism. In work, we rev...

The introduction of 0.5–1.0 wt.% graphite to the powders prepared by Self-propagating High-temperature Synthesis (SHS) is found be highly beneficial for removal oxide impurities (from 2.7-8.8 0.2–0.5 wt.%) during spark plasma sintering (1950°C/20 min, 20 MPa) (Hf0.2Mo0.2Ta0.2Nb0.2Ti0.2)B2 and (Hf0.2Mo0.2Ta0.2Zr0.2Ti0.2)B2 ceramics. Concurrently, consolidation level achieved enhanced from about ...

The effect of fluence level on the discoloration of marble surfaces after the removal of the encrustation by 355 nm laser pulses is comparatively studied. Considering the thermochemical reaction possibly occurring in the encrustation during laser irradiation, the mechanism responsible for the discoloration of the cleaned marble surface is analyzed. The reduction of iron oxides by graphite plays...

Introduction: Presolar grains are particularly abundant in primitive extraterrestrial materials such as IDPs [e.g. 1-3] and the matrices of the least altered chondrites [4-6]. To date, the presolar silicate and oxide inventories of the primitive chondrites Acfer 094 [4-7] and ALHA 77307 [7] have been reported extensively. More recently, the search for presolar silicates and oxides has been exte...

in this study, al/gr composites with 5,10,15,20 weight percent of graphite were produced by in-situ powder metallurgy method. the produced powder mixtures were consolidated and sintered at optimum conditions. the resultant composites were solution treated at 495?c and aged at 170?c. the influence of graphite content on the bending strength of composites was studied. the distribution of graphite...

Porosity is a major concern in the production of light metal parts. This work aims to identify some of the mechanisms of microporosity formation in magnesium alloy AZ91. Microstructure analysis was performed on several samples obtained from gravity-poured ingots in graphite plate molds. Temperature data during cooling was acquired with type K thermocouples at 60 Hz at three locations of each ca...

Electrodeposition of the iron oxide (FexOy) nanoparticles on graphite felt was prepared from a mixture (II) and (III) precursor solution with various pHs (2, 7, 10) by applying constant current (galvanostatic) 0.1 A for 30 minutes. Each resulting sample coded GF/FexOy -2, -7, -10, respectively. Graphite without modification, Raw-GF, used as control. The mass deposited ranged 0.02 to 0.03 grams....

The comminution of spent lithium-ion batteries (LIBs) produces a powder containing the active cell components, commonly referred to as “black mass.” Recently, froth flotation has been proposed treat fine fraction black mass (<100 µm) method separate anodic graphite particles from cathodic lithium metal oxides (LMOs). So far, pyrolysis considered an effective treatment remove organic binders ...

in this study, aluminium2024- graphite composites containing 5, 10, 15 and 20 weight percent of graphite were produced by solid assisted melt disintegration (samd) technique which resulted in production of al/gr powder mixtures which subsequently consolidated and sintered for preparation of al/gr composites. in this technique, powder mixture was prepared by addition of flake graphite (mean diam...