Background of Experiment
□ Al-Si Alloy
AI + Si = Al-Si Alloy
1. Low melting point
2. light
3. Large heat capacity
4. Insoluble to each other
.
.
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Result and Analysis - EDS
□ Composition Analysis
Al, Si is almost insoluble to each other at rsoom temperature.
All solid phase will have either 100% Al phase or 100% Si phase.
보통 SE라고 하는 것은 이차 전자, 혹은 자유 전자를 말한다. 예를 들어 금속면에 어느 에너지 이상으로 가속된 전자를 충돌시키면 금속 내부의 전자가 그 에너지의 대부분을 흡수하여 일함수 이상의 에너지를 가지게 되어 금속 바깥으로 방출되는데 이 현상을 2차 방출이라고 한다. 이때, 금속에 충돌시
Working in the static mode, the bending arises as a consequence of a surface stress change induced by any molecular reaction which takes places on only one of the cantilever surfaces. The induced surface stress change could be positive or negative, depending on the surface deformation generated. The factors and phenomena responsible for this change is today not fully understood due to the complex
What is Amorphous metal?
Polycrystalline grains of varying shapes and sizes
Misaligned planes of atoms slip past each other easily, absorbing energy and allowing dislocations to move, making deformation permanent.
Grain boundaries represent weak spots
Also called Metallic glasses or glassy metals
Cooled faster than atoms can rearrange into a crystal.
Dislocation movement obstructed s
The greater
the better
Strong materials are preferred(σ)
Deformation is constrained(E)
The smaller
the better
Light materials are preferred(ρ)
Energy loss is less as possible
Low price
Relatively light MMC
Strong
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