【正文】
and T is the temperature in degrees Kelvin. Example: Design a heat treatment that will provide 1000 times more vacancies in copper than are normally present at room temperature. About 20220 cal/mol are required to produce a vacancy in copper. The lattice parameter of FCC copper is . T=375K=102℃ b c c℃f cc℃b c cFeFeFe ??? ??