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...

Cast iron presents graphite particles of different shapes that directly affect its thermo-mechanical properties [1]. Fracture toughness and ductility depend strongly on the shape of the graphite particles. Particles with nodular shapes improve these properties while more elongated particles or with irregular contours are detrimental due to stress concentration points [2]. Thus, cast iron is cla...

We present three cases of intracorneal pencil graphite particles following penetrating ocular injury. Slit lamp examination revealed pencil graphite particles in the corneal stroma in all cases. Although we did not remove the particles, no complications occurred during the follow-up period. We assumed that removal of the pencil graphite particles was unnecessary, and it was avoided to prevent t...

A new material containing macroscopic quantities of onion-like carbon (OLC) particles is produced by heat treatment of ultra-disperse diamond (UDD) powder (2-6 nm). Annealing products (characterized by high-resolution electron microscopy) are presented by: (a) quasi-spherical particles with closed concentric graphite shells, (b ) polyhedron particles with closed shells, (c) elongated particles ...

Considering the need to reduce waste production and greenhouse emissions by still keeping high energy efficiency, various 4 generation nuclear energy systems have been proposed. As far as graphite moderated reactors are concerned, one of the key issues is the large volumes of irradiated graphite encountered (1770 m for fuel elements and 840 m for reflector elements during the lifetime (60 years...

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...

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...

Production of Fe-C alloy powders by mechanical alloying was studied. Fe and graphite elemental powder mixtures containing 0.8 and 1.5wt.% graphite were mechanically alloyed using a planetary ball mill. The structural changes of powder particles during mechanical alloying were studied by x-ray diffractometery, scanning electron microscopy and microhardness measurements. For both compositions, me...

low water-wettability and oxidation resistance of graphite have limited its application in carbon containing refractory castables. the aims of this study were improvement of water-wettability and the oxidation resistance of natural flaky graphite by applying an oxide coating on its surface. to develop the coating, magnesium aluminate spinel sol was formulated via a citrate-nitrate route and gra...

production of fe-c alloy powders by mechanical alloying was studied. fe and graphite elemental powdermixtures containing 0.8 and 1.5wt.% graphite were mechanically alloyed using a planetary ball mill. thestructural changes of powder particles during mechanical alloying were studied by x-ray diffractometery,scanning electron microscopy and microhardness measurements. for both compositions, mecha...