Ordering Massive 上海充夏大￥ SHANGHAI JIAO TONG UNIVERSITY Ordering reactions a(disordered)a'(ordered) (i) B (i) Disordered dered ●Cu OAu Massive transformations B→a Original phase decomposes into one or more new phases which have the same composition as the parent (i) phase,but different crystal B (ii) B structures Stable a Metastable a K.Chen 16K. Chen Ordering reactions Massive transformations Ordering & Massive 16 Original phase decomposes into one or more new phases which have the same composition as the parent phase, but different crystal structures Stable α Metastable α Disordered Ordered