Interactions between vacancies and prismatic Σ3 grain boundary in
α
-Al
2
O
3
: First principles study
Wang Fei
1, 2
, Lai Wen-Sheng
1, †,
, Li Ru-Song
2
, He Bin
2
, Li Su-Fen
2
Variations of the difference of system energy, Δ
E
, with distance between two vacancy sites.