FORMATION AND ANNIHILATION OF STACKING-FAULTS IN PURE ICE
FORMATION AND ANNIHILATION OF STACKING-FAULTS IN PURE ICE
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DOI：
10.1021/j100244a008
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发表时间：
1983-01-01
影响因子：
--
通讯作者：
HIGASHI, A
中科院分区：
文献类型：
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作者：
HONDOH, T;ITOH, T;HIGASHI, A
用X射线形貌术研究了高纯水生长的新鲜冰晶中层错的形成和湮灭过程。在晶体生长过程中形成的间隙位错环中观察到了层错，其层错矢量为R=1/6(2023~gT；)和R=‘/^(TOLO)。根据界面引入的过量间隙水分子的偏析过程，讨论了这种层错的形成机制。测量了断层位错环和非断层位错环的收缩速率。断层环的不同缩小率可以归因于断层环的大Burgers矢量，这是由它们在X射线地形上的强烈对比所证实的。用断层位错环和非断层位错环的收缩速率确定R=1/6的层错能为0.31mJ/m~2。
Both formation and annihilation processes of stacking faults in fresh ice crystals grown from high-purity water were studied by X-ray topography. Stacking faults with the fault vectors R= 1/6 (2023> and R='/^(tOlO) were observed in the dislocationloops of interstitial type formed during crystalgrowth. The formation mechanism of such stackingfaults is discussed in terms of a segregation process of excess interstitial water molecules which are introduced at the interface and are generated by cooling of thegrown crystals. Shrinkage rates of both faulted and unfaulted dislocation loops were measured. Thevariety of the shrinkage ratefor the faulted loops can be attributed to the large Burgers vector of the loops confirmed by their strong contrast in X-ray topographs. The stacking fault energy for the fault of which R= 1/6< 2023> was determined to be 0.31 mJ/m2 by the use of shrinkage rates for both the faulted and unfaulted dislocation loops.