Les dislocations dans la forsté rite déformée à haute Tempé rature
Les dislocations dans la forsté rite déformée à haute Tempé rature
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高级森林变形仪式中的错位
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
M. Darot
中科院分区：
文献类型：
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作者：
P. Gueguen;M. Darot
摘要 镁橄榄石高温变形中的位错在中等应力（8-100 MPa，1400-1650°C）下对镁橄榄石单晶进行了高温蠕变实验。样品因三个简单方向的压缩而变形。这里报告了这三组样品的位错微观结构。之前的观察是使用非常有效的装饰技术进行的。 TEM 结果证实了该技术的可靠性。此外，它们还可以完整识别伯格斯载体和激活的滑动系统。对于第一个方向，大多数位错是滑移带中的“a”边缘。还存在倾斜墙。 “a”边不是很直。对于第三个方向，大多数位错是“c”螺钉。扭曲的墙壁有很多。 “C”型螺钉非常直。第二取向介于第一取向和第三取向之间。它以高度可变的比例显示了两种类型的微观结构。这些事实她...
Abstract Dislocations in forsterite deformed at a high temperature Creep experiments have been performed at high temperatures on forsterite single crystals at moderate stress (8–100 MPa, 1400–1650°C). Samples have been deformed by compression in three simple orientations. Dislocation microstructures are reported here for these three groups of samples. Previous observations were made using a very efficient decoration technique. TEM results confirm the reliability of this technique. Moreover they give a complete identification of Burgers vectors and activated slip systems. For the first orientation, most of the dislocations are ‘a’ edges in glide bands. Tilt walls are also present. The ‘a’ edges are not very straight. For the third orientation, most of the dislocations are ‘c’ screws. Twist walls are numerous. The ‘c’ screws are very straight. The second orientation is intermediate between the first and the third ones. It shows the two types of microstructures in highly variable proportions. These facts she...