作者weakhsuan (吳大)
看板NTUMSE-98
標題[物冶] 第一次小考詳解
時間Fri Sep 24 21:37:54 2010
Physical Metallurgy Test 1 (Sep. 23, 2010)
系級 __________ 學號 __________ 姓名 __________
1. List the characteristics of grains from optical metallurgy.
(Give two terms.) (10%)
size and morphology
2. When we observe the grains of metals using an optical microscope,
which minimum scale can we see? (10%)
1 μm
3. Concisely define the latice point. (20%)
All lattice points have the same environment in the same orientation
and are indistinguishable from one another.
Any lattice point is related to any other by a simple lattice
translation vector.
4. Give the shortest lattice vectors for BCC and FCC metal crystals,
respectively. (10%)
For BCC : 二分之一 < 1 1 1 >
For FCC : 二分之一 < 1 1 0 >
5. Fill in the following table for BCC, FCC and HCP metal crystals. (30%)
Bravais lattice type No. of 科科 per unit cell
科科=atom 科科=lattice point
BCC Cubic-I 2 2
FCC Cubic-F 4 4
HCP Hexagonal-P 2 1
6. How many planes can be represented by using the family planes { 1 1 1 }
in a cubic crystal? List all the corresponding planes.
_ _ _
4 planes : ( 1 1 1 ), ( 1 1 1 ), ( 1 1 1 ), ( 1 1 1 )
7. How many planes can be represented by using the family planes { 1 1 0 }
in a cubic crystal? List all the corresponding planes.
6 planes : ( 1 1 0 ), ( 1 0 1 ), ( 0 1 1 )
_ _ _
( 1 1 0 ), ( 1 0 1 ), ( 0 1 1 )
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這是助教給的詳解
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