Figure 5

Crystallographic orientation relationship between Si and eutectic Al₂Si₂Eu: (a) bright field TEM image showing eutectic Al₂Si₂Eu surrounded by Si; (b) inverse pole figure of a TKD map showing mutually twinned Si crystal orientations. Black boundaries between Si grains show ∑3 twin (60° @<111>), and the green boundary highlights a ∑9 twin (38.9° @<110>). (c–e) Pole figures (PF) corresponding to the three Si crystals marked in (b). All PF were re-oriented to the (0001)_Al2Si2Eu in the normal direction (ND) for convenience. Circles depict coincident poles (parallel plane-normals) between 011_Si and 0001_Al2Si2Eu. Triangles depict coincident poles in 011_Si, 111_Si and 6\(\bar{7}\)10_Al2Si2Eu.