A review is given of the analogous dependence on reciprocal square root of grain size or crack size of fracture strength measurements reported for steel and other potentially brittle materials. The two dependencies have much in common. For onset of cleavage in steel, attention is focused on relationship of the essentially athermal fracture stress compared with a quite different viscoplastic yie...

The morphology of structuring and composition forming the ceramic-metal composite material (cermet) TiC/Al is shown in obtaining it using a new method with spontaneous infiltration aluminum melt into porous ceramic frame titanium carbide TiC synthesized combustion mode initial mixture powders (charge) Ti+C, i.e. process self-propagating high-temperature synthesis (SHS).

Zinc oxide (ZnO) is a strong candidate for energy-efficient white lighting and numerous optoelectronic applications. Hydrogen impurities play important roles, good and bad, in the pursuit of reliable p-type doping of ZnO. In pervious work, we identified hydrogen donors with the back-bonded or ‘‘anti-bonding’’ orientation, with an angle of 1111 to the c-axis. It is possible, however, that these ...