방향성 리본형 공정합금의 제조 및 미세조직 안정성

Ribbon type Pb-Sn eutectic alloy of 0.2∼0.8 ㎜ thickness fabricated continuously by using an unidirectional solidification apparatus. When the controlled growth velocity was in the range of 0.011∼0.038 ㎝/min. at the constant temperature gradient in solid, G= 33.79 ℃/㎝, well aligned eutectic specimen of lamellar spacing, λ= 2∼4 ㎛ could be prepared into ribbon shape longer than 100 ㎜ in length. A micro-morphological stability of solid-liquid interface was analysed by means of three theoretical stability models.