题目内容

3.1There are three mainly atomic structures found in metals, what are they?

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3.2What is the difference between crystallinity and amorphous materials?

3.5What are the crystal directions and planes?

3.4What is the closest packing which can be achieved in a plane?

A cubic array
B. A Hexagonal array
C. A random array
D. None of the above

4.1 How many kinds of ponit defects have been mentioned in Lecture 4? What are they?