Thermoelectric performance largely depends on the reduction of lattice thermal conductivity (?L). The study (?) a Sb2Te3/graphite nanocomposite system demonstrates ?40% in ?L with graphite incorporation. A plausible explanation intrinsic low observed Sb2Te3 based is presented by modeling experimental specific heat (Cp) data. Raman spectroscopy measurement combined to X-Ray diffraction data conf...

LiFePO4 materials synthesized using FePO4(H2O)2 and Li2CO3 blend were optimized in view of their use as positive electrodes in Li-ion batteries for hybrid electric vehicles. A strict control of the structural properties was made by the combination of X-ray diffraction, FT-infrared spectroscopy and magnetometry. The impact of the ferromagnetic clusters (γ-Fe2O3 or Fe2P) on the electrochemical re...

Submicron to micron size particles are produced in the gas phase of sputtering discharges. These particles can contaminate thin films grown by sputter deposition. On the other hand, particle production in a discharge can be desirable when used for manufacturing fine powders. Here, experimental results are presented demonstrating particle production in an argon discharge, using a variety of targ...

Abstract Ti–6Al–4V is the most commonly used titanium alloy in aerospace, marine, and biomedical applications. Due to properties of poor machinability conventional machining, Electrical Discharge Machining (EDM) considered a prospective alternative for machining this strategic material. This study aims at enhancing performance powder mixed EDM (PMEDM) with application two different types powder...

An X-ray diffraction technique was used to measure the residual stress in the surface of a specimen containing a coating of a NijAl intermetallic compound produced bythe SHS (Self-propagation High temperature Synthesis) method. The Ni3Al was using the coating material for spherical carbon cast iron substrate and austenite stainless steel substrate. Differences between the coefftcient of thermal...

In a two-dimensional carbon system for graphene (GP), three carbon electrons in four hybridized bonding electrons (2s12px12py12pz1) form strong in-plane sp2 bonds consisting of a honeycomb structure, and a fourth electron spreads out over the top or bottom of the layer as a π electron. The π electrons play an important role in the coupling interactions of multilayered GPs. A two-dimensionally s...