Structures and Properties of Mechanically Alloyed Aluminum-Transition Metal Oxide (V<SUB>2</SUB>O<SUB>5</SUB>, Nb<SUB>2</SUB>O<SUB>5</SUB>, Ta<SUB>2</SUB>O<SUB>5</SUB>) Powders and their P/M Materials

architecture and engineering of nanoscale sculptured thin films and determination of their properties

چکیده ندارد.

Magnetic hysteresis of mechanically alloyed Smâ•fiCo nanocrystalline powders

some properties of fuzzy hilbert spaces and norm of operators

in this thesis, at first we investigate the bounded inverse theorem on fuzzy normed linear spaces and study the set of all compact operators on these spaces. then we introduce the notions of fuzzy boundedness and investigate a new norm operators and the relationship between continuity and boundedness. and, we show that the space of all fuzzy bounded operators is complete. finally, we define...

Cryomilling of Aluminum-based and Magnesium-based Metal Powders

Ball milling has been shown to produce nanostructures in metal powders through severe repetitive deformation. Ball milling at cryogenic temperatures (cryomilling) is more effective in this capacity due to the low temperature by slowing recovery and minimizing diffusion distances between different components. Nanostructured metals are of interest because of their unique physical and mechanical p...

Nickel aluminide containing refractory-metal dispersoids: 1: Synthesis by reactive mechanical alloying

Nickel and aluminum powders were mechanically alloyed with 10 or 30 vol.% refractory metal powders (molybdenum or tungsten) for times up to 50 h. Intermetallic synthesis takes place after lo-20 h alloying, with concomitant dispersion of the inert refractory metal phase, resulting in an NiAl matrix containing fine refractory dispersoids. The reactive synthesis step is direct, without intermediat...