Two major areas of effort are encompassed: *• Synthesis of Superhard Mataj^als: The process of Activated Reactive Evaporation is used to synthesize superhard materials like carbides, oxides, nitrides, ultrafine grain cermets, ine deposits are characterized by hardness microstructure and lattice parameter measurements. The synthesis and characterization of various carbides in the Ta-C and W-C sy...

The monotonic and cyclic deformation behavior of ultrafine-grained metastable austenitic steel AISI 304L, produced by severe plastic deformation, was investigated. Under monotonic loading, the martensitic phase transformation in the ultrafine-grained state is strongly favored. Under cyclic loading, the martensitic transformation behavior is similar to the coarse-grained condition, but the cycli...

The tandem differential mobility analyzer (TDMA) technique was applied to determine the hygroscopicity and volatility of atmospheric ultrafine particles in three sites of urban Gwangju, industrial Yeosu, and coastal Taean in South Korea. A database for the hygroscopicity and volatility of the known compositions and sizes of the laboratory-generated particles wasfirst constructed for comparison ...

The formation of helium cavities in coarse-grained materials produces hardening proportional to the number density and size due interaction dislocations with intragranular defects. In nanostructured metals containing a high interfacial sinks, preferential cavity grain boundaries instead softening that is often attributed enhanced plasticity. Employing two grades ultrafine-grained tungsten, we e...

As a metamorphic product of coal, microcrystalline graphite is ultrafine polycrystalline structure with near-isotropic and highly graphitized characteristics, which endows itself great potential as filler for ultrafine-grain isotropic (UGIG). In this work, two kinds based UGIG, MGG12 MGG8, are prepared by liquid mixing process from an average particle size 12 8 ?m, respectively. For comparison,...