The present thesis has carried out detailed investigation on the rapid solidification of undercooled bulk water and pb - sn binary eutectic alloy with acoustic levitation , and the various factors influencing the achievement of undercooling in sound field have been analyzed 主要取得了以下幾方面的研究成果:研究了5 8mm的大體積水在聲懸浮無容器條件下的快速凝固行為。獲得了最大為24k的過冷度。
The microstructure , structure , composition , phase of joint region , and the microstructure and composition of fracture have been analyzed using the equipment of metallurgical microscope , sem , eds , xrd and binary eutectic phase diagram for the al - cu system and diffusion theory 利用金相顯微鏡、掃描電鏡、能譜儀、 x射線衍射分析儀,結合al - cu二元合金相圖及擴散理論,分析了接頭區域的形貌、組織、成分、相組成,以及斷口形貌、成分。