Production of nanocrystalline cermet thermal spray powders for wear resistant coatings by high-energy milling

Improved hydrogen sorption of sodium alanate by optimized processing

“…4d) the morphology has changed from NaH cladded to Al to agglomerates consisting of NaH dispersed in an Al matrix. As typical for a system consisting of hard and soft components, the formation of such composite particles during milling results from the deformation of the metallic phase and the fracture of the adhering hard phase, due to accumulation of mechanical stress at the interface to the deformed ductile phase [16,17]. The adherence of the hard phase to the metallic phase can be reduced or even inhibited by the presence of liquids, such as pentane, resulting in a slower refinement.…”

A Solid State Approach to Synthesis Advanced Nanomaterials for Thermal Spray Applications

“…In an effort to minimize milling time, milling can therefore, also be stopped at an earlier state followed by a classifying process to yield particle sizes in the sprayable range, thus saving time and energy (route B). In a third route C, high-energy ball milling may be combined with spray drying and sintering, leading to spherical and more open powder morphologies with a finer and more homogeneous phase distribution as compared to conventional feedstock powders 2003, 2005.…”

“…Such a layered structure can be readily produced by mechanical alloying of elemental powders 2003). A rigid bonding between the particles is caused by a cold welding when mechanical energy is applied to different kinds of powders .…”

“…20c, microstructures are characterized by carbide phase dimensions ranging from less than 20 nm (see Fig. 19) to about 500 nm 2003). .…”

Industrial production of light metal hydrides for hydrogen storage

“…In view of up-scaling of the storage material production, the high sensitivity of material properties to process parameters requires therefore a deeper understanding of microstructural and morphological formation of precursors during the production process. In the case of milling for example a brittle hydride together with a soft metal, agglomerates are formed, consisting of brittle particulates embedded and dispersed in a metallic matrix [38,39]. The formation of this morphology results from the continuous deformation of the soft phases and fracture of the hard phase [40].…”