小样品快速冷却实验台的研制及应用  

Development and application of a new kind of rapid quenching experimental setup for a small sample

作　　者：刘红姣[1] 吴锋[2] 

机构地区：[1]江汉大学化学与环境工程学院,武汉430056 [2]武汉工程大学理学院,武汉430074

出　　处：《低温工程》2007年第2期35-39,共5页Cryogenics

基　　金：湖北省教育厅重点项目(No.2003A010)

摘　　要：研制了一种用于小样品在低温冷却介质中实现超快速冷却的实验台。通过该实验台对小样品实施弹射,其弹射速度在较宽范围内可调,同时能对小样品的沉浸速度和淬冷温度进行准确的测量。将其应用于小样品在过冷液氮中的超快速冷却过程,可以实现较高的沉浸速度和冷却速率。实验研究表明随着小样品沉浸速度的增大、液氮过冷度的增加,冷却速率明显增加。A kind of ultra-rapid cooling experimental system for small sample was designed and developed. The ejecting speed of the ejector could be adjusted continuously in a wider range, the ejecting speed and the temperature of the small sample could he measured accurately. As the equipment was used to study the ultra-rapid cooling of a small sample in sub-liquid ni^Lrogen, the high quenching speeds and the high cooling rates could be reached. The experiment shows that the cooling rates increased dramatically as the ejecting speeding and the sub-liquid nitrogen sub-coolings increased.

关 键 词：实验台 弹射装置 超快速冷却 

分 类 号：TK124[动力工程及工程热物理—工程热物理] O51[动力工程及工程热物理—热能工程]