3.3 공정점 (
)을 갖는 2성분계
① * Eutectic Composition : has a special composition with a min. melting T.
* Eutectic- liquid in equilibrium with two solids
* 공정반응 (eutectic reaction) : 냉각 시 단상 액상 → 2상의 고상
cooling cooling
L ⇄ α + β ( L ⇄ A + B )
heating heating
② 미세구조 개요
온도 (℃)
(융액+결정)상의 분률을 구하는
근거,( )안은 조성 상 % 상의 조성% 분석 %
A B
T1
( ) mm melt ( ) A ( ) ( )
B ( ) ( )
( ) mm ( ) crystals ( ) A ( ) ( )
B ( ) ( )
70.0 30.0
T2
( ) mm melt ( ) A ( ) ( )
B ( ) ( )
( ) mm ( ) crystals ( ) A ( ) ( )
B ( ) ( )
70.0 30.0
T3
( ) mm melt ( ) A ( ) ( )
B ( ) ( )
( ) mm ( ) crystals ( ) A ( ) ( )
B ( ) ( )
70.0 30.0
T4+
( ) mm melt ( ) A ( ) ( )
B ( ) ( )
( ) mm ( ) crystals ( ) A ( ) ( )
B ( ) ( )
70.0 30.0
T4-
( ) mm eutectic ( ) A ( ) ( )
B ( ) ( )
( ) mm ( ) crystals ( ) A ( ) ( )
B ( ) ( )
70.0 30.0
③ A 70.0 wt% B 30.0 wt%인 X조성의 융체가 상온으로 평형 냉각 시 등조성선 연구
온도 (℃)
(융액+결정)상의 분률 및 결정상 명칭
상 분률 (%)
각 상의 조성 분률 (%)
분석 분률 (%)
MnO Al2O3
1670
( ) mm melt ( ) MnO ( ) ( )
Al2O3 ( ) ( )
( ) mm ( ) crystals ( ) MnO ( ) Al2O3 ( )
65.0 35.0
1560
( ) mm melt ( ) MnO ( ) ( )
Al2O3 ( ) ( ) ( ) mm ( ) crystals ( ) MnO ( ) ( )
Al2O3 ( ) ( )
65.0 35.0
1520+
( ) mm melt ( ) MnO ( ) ( )
Al2O3 ( ) ( ) ( ) mm ( ) crystals ( ) MnO ( ) ( )
Al2O3 ( ) ( )
65.0 35.0
1520-
( ) mm eutectic melt ( ) ( ) ( ) ( )
( ) ( ) ( ) ( ) ( ) mm ( ) crystals ( ) MnO ( ) ( )
Al2O3 ( ) ( )
65.0 35.0
25
( ) mm ( ) crystals ( ) MnO ( ) ( )
Al2O3 ( ) ( ) ( ) mm ( ) crystals ( ) ( ) ( ) ( )
( ) ( ) ( )
65.0 35.0
④ MnO 65.0 wt% Al2O3 35.0 wt%인 X 조성 융체의 등조성성 연구
⑤ Si 50.0 wt% Cu 50.0 wt%인 박막의 계면상 변화
What happens if we anneal to 460 °C a Si device with Cu lines fabricated on top?
Imagine the interface composition is 50/50 wt%. What if we now heat up beyond 802°C?
Upon cooling from above 802 °C?
