Nucleation of fcc Ta when Heating Thin Films

Janish, Matthew T., William M. Mook, and C. Barry Carter, 2015
Fusion TEM holder tip
Image courtesy of Scr. Mater.


Thin tantalum films have been studied during in situ heating in a transmission electron microscope. Diffraction patterns from the as-deposited films were typical of amorphous materials. Crystalline grains were observed to form when the specimen was annealed in situ at 450 °C. Particular attention was addressed to the formation and growth of grains with the face-centered cubic (fcc) crystal structure. These observations are discussed in relation to prior work on the formation of fcc Ta by deformation and during thin film deposition.

Impact Statement

Fusion in situ heating was utilized to explore crystallization mechanics of amorphous materials.