Flame initiated (800 °C, 10 s) or bulk thermal (2 days, 1000 °C ) reactions of mixed powders of transition metal halides and CaC 2 or Al 4 C 3 produce transition metal carbides ( TiC, ZrC, HfC, V 8 C 7 , NbC, TaC, Cr 3 C 2 , Mo 2 C and WC ) in good yields. The carbides were characterised by X-ray powder diffraction, SEM/EDX, FTIR, microelemental analysis, TEM, electron diffraction and ELNES. bides exceeds 15000 tonnes annually.11 They are traditionally

Self-organized Co/Pt nanoparticulate arrays offer a novel approach to fabricating magnetic recording media with the potential for supporting Terabit/in.2 recording densities. Protein-derived Co/Pt nanoparticles are prepared within apoferritin from aqueous reactants, with synthesis conditions controlling grain size, structure, and composition. Smooth films on glass disk substrates are produced by either spin coating or dip coating from aqueous dispersions of the precursor material. Films are typically annealed at 590 °C for 60 min with a 19 kPa (190 mBar) partial pressure of H2 to form the L10 phase. By varying the annealing conditions we are able to produce coercivities in the range of 500–8000 Oe. Electrical testing of Co/Pt nanoparticulate media using a contact test recorder shows that these nanoparticle films are capable of sustaining recording densities of more than 12.6 Gbits/in.2 (143.6 kfci, kilo flux changes per inch). In this article we will present results from finished films with regard to film structure, magnetic properties, and recording capabilities.

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followed by dropwise addition of 338 mL of H 2 O while stirring vigorously. The homogeneous mixture was purged with nitrogen and 5 mL of 1 M Cd(NO 3 ) 2 ×4H 2 O was then added via a microliter syringe to 10 mL of the stirred reverse micelle solution. 5 mL of 1 M Na 2 S was slowly added and the solution was stirred for 20 min. Particle sizes were determined by UV-vis spectroscopy.Mechanical testing was performed on single fibers of the inorganic-silk composites, which were attached to the twin arms of a custom-built stress± strain gauge using cyanoacrylate adhesive, and hysteresis cycles and breaking strength measurements were performed at ambient conditions of 29 C and 34 % relative humidity. The measured stress was normalized using fiber diameters determined by SEM (mean diameter = 3.1±0.5 mm). The custom stress±strain gauge consisted of a FORT 10 force transducer (World Precision Instruments) and a Pen Motor Assembly (Hewlett Packard).