The interfacial defects of hard magnetic Pr2 Fe14 B phase from amorphous to nanostructures have been investigated by positron lifetime spectroscopy. The nanostr
The results indicate that during charge and discharge, the expansion of Ni(OH)2 crystal, pulverization of MH alloy particles and falling off from current collec
Al2O3/WC powder was synthesized by means of aluminothermic reduction-carbonization with metallic Al powder, yellow tungsten oxide and carbon black or graphite a
Mixture of green petroleum coke, B4C and SiC together with short carbon fiber were employed as starting materials, the mixture was press-formed without any bind