Q. The grain boundry area decreases when the polycrystalline material heated .. (Solved)
1. below 0.5 tm
2. below 0 k
3. above room temperatur e
4. above0.5tm
- d. above0.5tm
1. below 0.5 tm
2. below 0 k
3. above room temperatur e
4. above0.5tm