A new spectrophotometric method has been developed for determination of molybdenum using surfactantmediated liquid–liquid extraction. Molybdenum(V) obtained by ascorbic acid reduction in 2.5 M H2SO4 reacted spontaneously with thiocyanate and cetyl trimethyl ammonium bromide (CTAB), forming an intense orange yellow complex that was extracted quantitatively into 1,2-dichloroethane and absorbed at...

Novel nitrogen-doped carbon hybrid materials consisting of multiwalled nanotubes and porous graphitic layers have been produced by chemical vapor deposition over magnesium-oxide-supported metal catalysts. CN x nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carb...

Introduction: During our nano-mineralogy investigation of the Allende meteorite, we discovered two new minerals that occur as microto nano-crystals in refractory inclusions: Allendeite, Sc4Zr3O12, a new Scand Zr-rich oxide; and hexamolybdenum, (Mo,Ru,Fe), a Mo-dominant alloy. Allendeite, which may be an important ultra-refractory carrier linking Zr-, Scoxides and the more common Sc-, Zr-enriche...

Abstract Recent theory proposes that edge dislocations in random body-centered cubic (BCC) high entropy alloys have barriers for motion, conveying strengths up to temperatures. Here, the energy motion are computed two model alloys, NbTaV and MoNbTaW as represented by interatomic potentials, using Nudged Elastic Band method compared theoretical predictions. The average magnitude of spacing along...

Introduction: During our nano-mineralogy investigation of the Allende meteorite, we discovered two new minerals that occur as microto nano-crystals in refractory inclusions: Allendeite, Sc4Zr3O12, a new Scand Zr-rich oxide; and hexamolybdenum, (Mo,Ru,Fe), a Mo-dominant alloy. Allendeite, which may be an important ultra-refractory carrier linking Zr-, Scoxides and the more common Sc-, Zr-enriche...

The Electron Beam Melting (EBM) manufacturing process is emerging as an additional method for producing orthopaedic devices in several materials, including Co-Cr-Mo Alloy. This work presents the chemical, microstructural and mechanical properties of several test specimens produced by the EBM process before and after a post‐EBM Heat treatment. Comparisons are made to the properties of Co-Cr-Mo m...

At present, alloy materials are being widely used as wear-resistant coatings due to good mechanical properties. In this paper, electrodeposition was prepare a Co–Mo coating. The influence of parameters on the phase, morphology, composition, and property coating has been studied, electrochemical mechanism deeply studied. study process found that when concentration Na2Mo4 is 0.05 mol/L, C6H5Na3O7...

A ceramic–metal composite (cermet) of uranium nitride (UN) particles embedded in a tungsten-molybdenum (W/Mo) alloy matrix is being considered as reactor fuel for nuclear thermal propulsion (NTP). One possible issue the loss fissile atoms during operation. We begin by reviewing historical data that suggest likely mechanism transport free along metal grain boundaries and through cracks to surfac...

TC17 titanium alloy is widely used in the aerospace industry, but its combustion behavior and microstructure after are rarely investigated. Herein, ignition critical oxygen pressure, velocity, of were investigated by promoted tests under an oxygen-enriched environment. The results indicated that there three stages, ignition, splash, flame propagation, for process alloy. As compared to TC11 allo...