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.
Keff, Km, Kp : the effective thermal conductivities of the composite,
Metal matrix, Particles
φp : the volume fraction of reinforcements
a : the diameter of the reinforcement
- hc : the boundary conductivity.
Advantage
The air travels across the short
length of the fins laterally, rather than longitudinally down
the long length.
Focused on placing
이러한 관점에서 Pb Solder는 Pb의 매장량이 높고, 결착성이 좋으며 가장 좋은 특성으로는 낮은 융점 때문에 Pb Solder의 사용이 널리 퍼져 있었다. 사실 접합부에 Pb를 사용하는 것은 전도도가 좋기 때문은 아니다. Pb의 전도도는 Cu의 7%밖에 되지 않는다. 그러나 Pb를 사용하게 된 이유는 역시 대량 생산제품의
resulting nanocomposites. However, the effective thermal conductivity of carbon-based nanocomposites is strongly influenced by the Kapitza interfacial resistance.
In this study, a comparison between carbon nanotubes and graphene sheet nanocomposites that takes into account dispersion patterns of the nanoinclusions and the Kapitza resistance is performed by means of a Monte Carlo simulation.
properties.
Because of the extraordinary range of properties of polymeric materials, they play an essential and ubiquitous role in everyday life. This role ranges from familiar synthetic plastics and elastomers to natural biopolymers such as nucleic acids and proteins that are essential for life.
Most commonly, the continuously linked backbone of a polymer used for the preparation of plastics c
4. Condition
If reflow, IMC layer occurs between the solder ball and substrate. IMC layer's composition changes depending on reflow time.
Temperatuer
255℃
Reflow time
1s, 1min, 5min, 10min, 20min
Experimental conditions
5. Analysis
IMC layer change was observed according to the reflow time.(Reflow time : 1s, 1min, 5min, 10min, 20min). Do refer to
properties of the sample have changed. With power of Ge increasing continually, the intensity of Zn2GeO4 (1 1 0), Zn2GeO4 (2 2 0) and GeO peaks and three ZnO peaks become much higher. The peak around 34° should be considered as a multiple peak of Zn2GeO4 (4 1 0) and ZnO (0 0 2) because we know that their positions are very close in XRD patterns. So, the facts shown in XRD measurements reveal tha
BulkGibbs free energy of formation of the amorphous oxide islarger than that of the corresponding crystalline oxide.
Thin filmThe thin amorphous metal-oxide film on its metal substrate can be stable modification with respect to the corresponding crystalline metal-oxide film the same substrate.
1. Interaction contribution to the -interfacial energy
Following the treat
실험목적
시편 처리 과정 cold mouting, grinding, polishing 과정을 통해 시편의 구조를 광학 현미경으로 관찰하여 알아본다.
이론적 배경
이번 실험은 시편 처리 과정, 마운팅 - 그린딩 - 폴리싱 - 에칭에 관한 실험으로써 콜드 마운팅을 이용하였고 광학 현미경을 이용한 분석을 주로 하였다. 시편 처리
Synthesis
Grafting onto
“Grafting-onto” involves the chemical reaction preformed, functionalized polymers with surfaces containing complementary functional groups
Grafting from
‘‘Grafting-from’’ involves an in situ polymerization of an initiator functionalized surface with monomer.
Grafting onto
“Grafting-onto” involves the chemical reaction preformed, functionalized p