纳米孪晶金属和纳米孪晶共价材料的力学行为
Mechanical Behaviors of Nanotwinned Metals and Nanotwinned Covalent Materials
(a) a polycrystalline nt-diamond microstructure consists of subparallel nanoscale twin lamella embedded in submicrometer-sized grains (Grains have random orientations)
(b) three dislocation slip modes in nt-diamond: slip transfer (slip mode I), confined layer slip (slip mode II), and paralleled to TB slip mode (slip mode III) (Tetrahedrons ABCD and ATBTCTDT represent the Burgers vectors of dislocations in the parent crystal and its twined counterpart, respectively. The partial dislocations are denoted by Roman-Greek pairs (such as Aδ, Cδ, Bδ, etc.))
