In-situ observation of crystal detachment behavior in NH 4Cl-H2O system from chilling metal surface with vibration

Ying Zhang, Meng Wang, Li Cheng Du, Xin Lin, Wei Dong Huang

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

The crystal detachment behaviors from a chilling solid surface with vibration were investigated using a transparent NH4Cl-70H 2O alloy. The nucleation experiments of NH4Cl-70H 2O alloy were performed on a chilling surface generator with various vibration frequency from 20 to 1 000 Hz and vibration acceleration from 10 to 100 m/s2. The results indicate that the crystal detach rate increases and the grains are refined with increasing vibration acceleration under a certain vibration frequency. It is interesting to note that, when the frequency is 50 Hz, acceleration is 100 m/s2, the crystal detach rate increases sharply and the grain refinement effect is strengthened. A special grain refinement phenomenon can be observed, when the vibration acceleration and frequency are up to a critical value. A power-based definition was introduced in order to describe the relationship between the vibration parameters and imposed power on the system. It is found that a power criterion exists for the grain refinement in the current system.

源语言英语
页(从-至)s821-s825
期刊Transactions of Nonferrous Metals Society of China (English Edition)
20
SUPPL. 3
DOI
出版状态已出版 - 9月 2010

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