The orientation and texture of Cr(110) films on the basal plane of α-Al2O3 was investigated by transmission electron microscopy. The Cr was deposited via molecular beam epitaxy at a substrate temperature of 110°C resulting in the formation of crystallites with columnar mophology. Two orientation relationships (OR) were observed between Cr(110) and α- Al2O3(0001): Cr // α-Al2 O3[̄110] and Cr[̄111] // α-Al2 O3[̄110]. Each of these orientation relationships exhibited two variants which were rotated ±5.26° around the substrate normal. The orientation relationships can be rationalized on the basis of geometry, rotational symmetry and lattice mismatches of the Cr/(110) /α-Al2O3(0001) interface. The occurrence of all OR can be related to Nishiyama-Wassermann (NW) and Kurdjumov-Sachs (KS) orientations and are discussed with respect to previous experimental results and geometrical parameters of other bcc metals which were grown on α-Al2O3(0001).
|Number of pages||8|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2003|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry