Q130
Gold has surface free energy of 1.5 J.m-2 and grain boundary energy of 0.365 J.m-2. The groove angle that forms where a grain boundary intersects the free surface in a well annealed sample is
A.
42°
B.
83°
C.
166°
AnswerD.
180°
Answer: Option C
Solution
Answer: Option C
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