In view of large interest in the improve of Al/Al alloy based Metal matrix Composite and high-temperature ceramics on the base of silicon carbide, a comprehensive review of the data on structure, properties and the known methods of processing of silicon carbide seems timely. The most striking feature of silicon carbide is its polytypism, i.e. formation of a great number of structural changes wi...

This work investigates existing metal-graphite joining methods with friction stir extrusion (FSE) proposed as a viable alternative process. Current for these materials, including adhesives, mechanical fastening, and brazing, all have shortcomings that are desired to be avoided. Aluminum AA6061-T6 is used isostatically molded graphite establish proof-of-concept FSE. Empirically determined operat...

Several methods have been developed previously for estimating cumulative energy production and plutonium production from graphite-moderated reactors. These methods generally fall into the category of nuclear archaeology. The Graphite Isotope Ratio Method (GIRM) is one well-known technique of this type. This method is based on the measurement of trace isotopes in the reactor’s graphite matrix to...

Submicron-sized airborne particulate matter (PM) is not collected well on regular quartz or glass fiber filter papers. We used a micro-orifice uniform deposit impactor (MOUDI) to fractionate PM into 6 size fractions and deposit it on specially designed high-purity thin aluminum disks. The MOUDI separated PM into fractions 56–100, 100–180, 180–320, 320–560, 560–1000, and 1000–1800 nm. Since the ...