Antiphase boundary conservative

Antiphase boundary (APB) conservative vacancy segregation at Arrhenius plot Asymmetrical mixtures Atomic-sphere approximation (ASA) ASA-LSDA... 

Category(ii) (layers of CC structure as non-conservative antiphase boundaries) ... 

Figure 17. A non-commensurate, layer misfit structure (o), composed of alternating layers of two types, and the recombination structures (i-iii) derived from (o) by means of (i) composition-conservative and of (ii-iii) two kinds of composition non-conservative antiphase boundaries (or glide planes), (iv) A layered non-commensurate structure with corrugated layers that are composed of alternating strips of two kinds that exhibit layer misfit on interfaces.

Fig. 12.4. Schematic illustration of conserved and nonconserved order parameters for characterizing the internal state of a binary alloy (adapted from Chen and Wang (1996)) (a) disordered phase (rj = 0) with uniform composition cq, (b) two-phase mixture consisting of disordered phases (rj = 0) with composition Cq, and c, (c) ordered single phase (ri = 1) of single composition ci with an antiphase domain boundary.

Stresses and strains as well as the charge balance problems in the non-commensurate layer structures can be relieved by breaking them up by means of glide planes, antiphase or out-of-phase boundaries, or by exposing alternatively the Q and the H surfaces of the same layer (Fig. 17). With respect to the rest of the structure, these planes of break-up may be composition-and-structu re-conservative or non-conservative (Fig. 17). Problem 5 deals with several basic types of this category. 

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