Scanning electron microscopy molybdenum

Brendle described a process which he called polymer grafting, in which particles of molybdenum disulphide or other solid lubricants were coated with various polymers, including polystyrene, polymethylmethacrylate and poly-isobutylvinyl ether. The process was most conveniently carried out by grinding coarse molybdenum disulphide powder in a 20% - 30% solution of the appropriate monomer in a solvent. The quantity of polymer added to the molybdenum disulphide particles was very small, and could not be detected by scanning electron microscopy or infrared spectroscopy. The carbon content (1-4%) indicated a polymer content up to 6% maximum. Brendle considered that the polymer was preferentially grafted onto surface freshly exposed by grinding. This may be partly true, but in view of later... 

Braid surfaces at the failure point and a spot away from that area were analyzed. The external and internal surfaces of the braid at the failure area were mildly discolored because of oxidization, similar to the effect of overheating a metallic object. Optical microscopy and scanning electron microscopy showed no disturbance to the weave pattern, no deformation of metal wires, and no surface defects, based on the comparison of defective and normal areas. Energy dispersive x-ray (EDX) showed similar concentrations of iron (Fe), nickel (Ni), chromium (Cr), and molybdenum (Mo) in both areas, indicating stainless steel. A small amount of silicon (Si) was detected that was attributable to environmental contamination such as dust and dirt. 

Fig. 3.4.9. Secondary electrons scanning electron microscopy of a chromium-cobalt-molybdenum shaving collected after digestion of lung tissue of a dental technician. Machining streaks reflect a mechanical formation process during grinding of dental prostheses...

The elemental profile distribution of both molybdenum and phosphorus, across the transversal section of the alumina extrudates. was obtained using the scanning electron microscopy technique (SEM). An ISI-60 apparatus equipped with an energy dispersive X-ray analyzer (Kevex S-7000) was used for these measurements. Catalyst extrudates were mounted on an epoxy slide and then polished before scanned under the electron beam. 

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