Climb dissociation of 〈1010〉 dislocations in sapphire (α-Al2O3)
Climb dissociation of 〈1010〉 dislocations in sapphire (α-Al2O3)
复制标题
蓝宝石 (α-Al2O3) 中 <1010> 位错的爬行解离
DOI：
10.1080/01418618208236914
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发表时间：
1976
影响因子：
1.6
通讯作者：
J. Cadoz
中科院分区：
文献类型：
--
作者：
D. S. Phillips;J. Cadoz
蓝宝石（α-Al2O3）在棱柱滑移的早期阶段，由边缘偶极子形成< 1010 >位错环。这些环以边缘为主，通过爬升分离成三组同心环，b = 1/3 < 1010>。这些断层环位于棱柱平面上。当环路因整体扩散而收缩时，它们转变为双解离的故障环路，然后转变为单故障环路。在所有这些反应中产生的阳离子断层与先前报道的< 1010>位错的滑动解离相同。从观察到的平均半径和离解程度推断出的层错能与先前报道的范围一致。
Abstract 〈1010〉 dislocation loops are formed from edge dipoles during the early stages of prismatic slip in sapphire (α-Al2O3). These loops are predominantly edge in character and dissociate by climb into triplets of concentric loops with b = 1/3〈1010〉. These faulted loops lie on {1120} prismatic planes. As the loops shrink by bulk diffusion, they transform to doubly-dissociated faulted loops and then to single faulted loops. The cation fault produced in all these reactions is identical with that previously reported for the glide dissociation of the 〈1010〉 dislocations. The stacking fault energies inferred from the mean radii and extents of dissociation observed are in agreement with the range of those previously reported.