Aim
Reducing weights
High fuel efficiency
Low fuel consumption
Reduction total amount of CO2 gas
Structure of an automobile
Chassis
Mg-Zn-Zr alloy
Magnesium alloy + Zr
Grain refinement
Mg-Ce alloy
Precipitation Ce on GB at high temp.
High creep strength
Engine parts(Introduction)
Basic engine part
High engine weight ratio
Requir
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.
4. The Relationship between Korea and Congo
- Congo, with the DanChurchAid agency asserting that “much of the finance sustaining the civil wars in Africa, especially in the emocratic Republic of the Congo, is directly connected to coltan profits.
1) tantalum; part of the refractory metals group, which are Widely used as minor component in alloys. The chemical inertness of tantalum makes it
and the solubility will increase
- because the ionic radii of Mg and Zn atoms are similar
MgxZn1−xO films (Mg content of ~50 at.%) have a wurtzite structure.
Above that content, the wurtzite structure was transformed into the cubic structure.
The crystal quality depends on growth conditions
- such as the substrates, growth temperature, buffer layers and sputtering power
Strength of matrix MMC : Boron fiber/Al (2024) alloy
300M :
Raw material of the MMC
- Boron cost : 5000$/Kg
- Al (2024) alloy : 6000 won/Kg
300M(AMS 6417) : 168$
Produced in single-filament reactors by CVD, boron fiber exhibits a unique combination of High Strength High Modulus and Large Diameter.
Elemental boron is deposited on a fine
tungsten wire(1000~1300℃) substrate