| Title |
On the Microstructure of Rapidly solidified Sn - Pb Alloys |
| Authors |
김원태(Won Tae Kim); 김동훈(Tong Hoon Kim) |
| Abstract |
Microstructural Analysis was carried out by using a Scanning Electron Microscope and X-ray Diffractometer in Rapidly Solidified Sn-Pb alloy. Nucleation of Pb phase occurred at higher temperature than Sn, due to large supercooling of liquid in R.S.P., thus Sn dendrite was not detected at hypoeutectic composition but Pb dendrite was at higher Pb content than 34% Pb. It was supposed that G/R criterion obtained from directional solidification could not be applicable in R.S.P. because Pb phase was able to nucleate in front of S/L interface owing to large supercooling of liquid. Pb was supersaturated in Sn phase but Sn was not largely in Pb phase, and directionality of micro-structure was observed as Pb content increases. |