Ice formed on airplanes can cause aircraft defects and accidents. On days with snow and at an altitude of 10,000 m, where the temperature falls below 40? below zero, ice forms on aircraft wings. When ice crystals are formed abnormally, the wing shape changes, degrading the lift. Thus, control of the growth rate and form of ice crystals greatly affects the safety and operation efficiency of aircraft.
Can water freeze at room temperature or even higher temperatures at which ordinary water boils? Formation of so-called "Warm Ice" maybe an unfamiliar phenomenon to the general public and yet can be made possible by controlling the crystallization process in which liquid turns into a solid. In principle, such manipulation could be achieved not only by changing temperature but also pressure. However, the latter requires exerting extreme level of pressure (10,000 times the atmospheric pressure) on water.
The Center for Convergence Property Measurement, Frontier in Extreme Physics Team at Korea Research Institute of Standards and Science (KRISS, President Sang-Ryoul Park) succeeded in creating room-temperature ice and controlling its growth behaviors by dynamically compressing water up to pressures above 10,000 atmospheres. By systematically varying the compression rates, the research team discovered a sudden morphological crossover from 3-dimensional to 2-dimensional ice. Rigorous investigation unveiled the underlying mechanism of the anomalous growth transition which is manifested in the forms of shape- and growth speed changes of ice. Such high-pressure technology and phenomena can have significant impact on a wide range of practical applications -- biology, foods, medical, and aerospace. READ MORE (Science Daily)