نتایج جستجو برای: mo si b
تعداد نتایج: 993081 فیلتر نتایج به سال:
The crystallinity of epitaxial graphene (EG) grown on a Hexagonal-SiC substrate is found to be enhanced greatly by capping the substrate with a molybdenum plate (Mo-plate) during vacuum annealing. The crystallinity enhancement of EG layer grown with Mo-plate capping is confirmed by the significant change of measured Raman spectra, compared to the spectra for no capping. Mo-plate capping is cons...
The effects of metalloids Si(4-27 at%) and B(5-22 at%) on the structure and magnetic properties of melt spun cobalt based alloys containing 5at% Fe have been studied. XRD results revealed that in non-eutectic ternary CoFeSi and CoFeB alloys, the additions of Si or B, alone can not lead to full amorphization of melt spun ribbons. In quaternary CoFeSiB alloys, the total amounts of Si and B additi...
The crystal structure of molybdenum triplatinum tetrasilicide, MoPt(3)Si(4), determined previously from powder diffraction data [Joubert et al. (2010 ▶). J. Solid State Chem.183, 173-179], has been redetermined using a single crystal synthesized from the elements by high-frequency melting. The redetermination provides more precise geometrical data and also anisotropic displacement parameters. T...
A Mo-modified H-MFI zeolite (Mo/H-MFI) catalyst is one of a typical catalyst for direct GTL (Gas to liquid), because it shows high activity for dehydroaromatization of methane in absence of oxygen. In this reaction, reduction of Mo species is brought about in contact with methane in initial step, and reduced Mo ions react methane to form carbide and/or oxycarbide species in next step. It has be...
Ambientto elevated-temperature fracture and fatigue-crack growth results are presented for five MoMo3Si-Mo5SiB2–containing -Mo matrix (17 to 49 vol pct) alloys, which are compared to results for intermetallic-matrix alloys with similar compositions. By increasing the -Mo volume fraction, ductility, or microstructural coarseness, or by using a continuous -Mo matrix, it was found that improved fr...
Mo carbide nanoparticles supported on ZSM-5 zeolites are promising catalysts for methane dehydroaromatization. For this and other applications, it is important to identify the structure and anchoring sites of Mo carbide nanoparticles. In this work, structures of Mo2Cx (x = 1, 2, 3, 4, and 6) and Mo4Cx (x = 2, 4, 6, and 8) nanoparticles are identified using a genetic algorithm with density funct...
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