3.3 공정점 ( )을 갖는 2성분계

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?