| 1. | Continuous cooling transformation of undercooling austenite of swrch22a steel
钢过冷奥氏体的连续冷却转变 |
| 2. | Influence of overheated temperature and cooling rates on the level of undercooling was analyzed respectively
分析了过热度、冷却速率分别对过冷度的影响。 |
| 3. | The rapid solidification process of pb - sn eutectic alloy is investigated with acoustic levitation and the maximum undercooling of 38k has been achieved
采用声悬浮无容器处理技术研究了pb - sn共晶合金在深过冷条件下的凝固规律。 |
| 4. | The theoretical calculation based on jh and tmk models is accomplished and predicts that the maximum undercooling for cooperative eutectic growth is 199k
发现随着过冷度的增大， al - cu共晶合金发生“规则共晶?不规则共晶”的组织形貌转变。 |
| 5. | In the isothermal crystallization experiment , the dsc exothermic curves become flat as decrease of the degrees of undercooling within the experimental temperatures
在等温结晶实验中，在所测试的结晶温度范围内，随着过冷度的减小， dsc放热曲线趋于变缓，结晶完成时间延长，结晶速率减小。 |
| 6. | The influences of the rotation of drops forced by orthogonal acoustic waves and the surface vibration on undercooling are analyzed and the conclusion that ultrasound can suppress the undercooling level has been drawn
分析了声场对过冷度的影响，认为声波引起的样品表面振动以及试样的绕轴自转都会抑制过冷度的进一步提高，不利于深过冷条件的获得。 |
| 7. | However the cavitation effect induced by ultrasound may prematurely catalyze nucleation , which hinders the further achievement of bulk undercooling . the measured growth velocity of ice dendrite is 0 . 17m / s corresponding to the maximum undercooling of 24k
讨论了空化效应对水滴过冷度的影响，认为空化效应诱发水滴提前形核，抑制了大过冷度的获得。 |
| 8. | Embedded in a flux of dehydrated b2o3 , melts of ge and ag etc . were undercooled by repeatedly treatment of melting and solidifying with a dsc facility , with undercooling of 190 k and 146 . 9 k respectively for ge and ag
对半导体ge 、金属ag等样品的过冷现象进行了研究和分析。通过助熔剂包裹和反复熔化与凝固处理，实验得到的ge 、 ag的最大过冷度分别为190k和146 . 9k 。 |
| 9. | 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
主要取得了以下几方面的研究成果：研究了5 8mm的大体积水在声悬浮无容器条件下的快速凝固行为。获得了最大为24k的过冷度。 |
| 10. | The current dendritic growth theory is modified so as to be applicable to ice dendritic growth under high undercooling conditions . experimental measurements are in agreement with the theoretical prediction at small undercoolings but exhibit some deviations at large undercoolings due to systemic errors
实验测定了不同过冷度下冰枝晶的生长速度，并且改进了冰枝晶的生长理论，使之更符合大过冷度时的枝晶生长情况。 |
