Structure of edge, screw, and mixed dislocations, and the mechanisms by which they propagate strain are covered. 内容涵盖刃差排、螺旋差排及混合差排的结构,及差排传递应变的机构。
Among the three configurations analyzed, dynamics simulation results show that a pairs of edge misfit dislocations appeared at all the relaxed interfaces. 能量学计算发现,存在最优构型,动力学模拟显示不同构型的界面弛豫后,在相界面上都“成对”出现刃型错配位错。
One was pure edge misfit dislocations with line directions of 〈 100 〉; Localization of anchor nodes for wireless sensor networks under magnetic dipole model 失配位错的类型分为刃型失配位错,位错线沿〈100〉方向;磁偶极子模型的无线传感器网络定位方法
The dislocations in GaN film mainly are stacking faults and edge dislocations, and the dislocation density and mosaic structures in GaN decrease rapidly away from the interface. GaN薄膜中的位错主要为堆垛层错与刃形位错;随着远离界面,GaN中位错密度与镶嵌组织迅速减少。
In this paper a photoelastic model is described which can display the interacted stress field for edge dislocations visually and successfully, moreover, using a microcomputer the arithmetic procedure can be programmed and the interacted stress field calculated. 本文介绍用光弹性模型能成功地显示刃型位错间交互作用的应力场,并且可将计算模型编制成相应的程序,利用计算机来求解这个应力场。
Calculation results showed that the light impurities C and N tend to aggregate at the core of edge dislocation and all the edge dislocations are tied together and can not move freely. 计算结果表明:轻杂质C,N易偏聚于位错芯处;
Using reflection polarizing microscopy to compensate the natural optical activity, along the optical axis, we obtained the images of edge dislocations and compared it with the calculation. 在实验上采用反射偏光法抵消旋光后沿光轴观察获得了位错双折射象,并和计算结果进行了比较。
The high-resolution images show that the interface of two phases is not straight and there are a series of edge dislocations and small structure-ledges, and it does not reveal continuous stringent coherent relationship. 贝氏体铁素体&奥氏体高分辨像显示,两相界面不平直,α和γ两相内有系列刃型位错和结构小台阶,两相界面未显示出连续的严格共格关系。
Not only mosaic blocks but also lattice imperfection including edge dislocations, vacancies, unknown defect with aperiodic fringes and even Kinks are quite clear in the high resolution electron micrograph. 在它的高分辨电子显微像中,不但可以看到明显的镶嵌块结构,而且可以清楚地看到刃位错、空位、非周期性结构与Kink等晶体缺陷。
Using stress formulas for the single edge dislocation in the theory of elasticity, distributions of the stress and stress birefringence in Nd: YAG single crystals growing along [ 111] with homogeneous circular and annular distribution dislocations on the flat interfaces wore calculated. 本文利用单个刃位错弹性理论的应力公式,借助于应力叠加的方法,计算了[111]方向平界面生长的YAG单晶中圆形和环形分布的位错束产生的应力和应力双折射分布。
The misfit dislocations are pure edge dislocation and that can be transformed to threading dislocations via slip. 失配位错为纯刃型位错,可通过滑移面的改变而形成穿透位错;
By assuming that the motion is thermally activated, the corresponding activation energy is obtained to be~ 2.94 eV. Velocities of edge ( or 60 °) dislocations and screw dislocations at 900 ℃ are compared, the latter being smaller. 设位错运动是热激活的,激活能为~2.94eV.比较了900℃下刃型(或60°)位错及螺型位错的速度,后者较小。
The Core of the Edge Dislocations and Its Vicinal Distorted Region 刃型位错芯及其畸变区范围
Because of the Burgers vector of the screw dislocations in [ 0001] direction are much larger than that of the edge dislocations, one can distinguish the screw dislocations from the edge dislocations according to the depth of etch pits. 由于[0001]方向的螺型位错的Burgers矢量比刃型位错的Burgers矢量大得多,故可从蚀坑的深浅来判别螺型位错和刃型位错。
Interaction Among Solute Atoms and Edge Dislocations in Steel or Iron 钢铁材料中刃位错与溶质原子的交互作用
Photoelastic Simulation Display of Interaction Stress Field of Edge Dislocations 刃型位错间交互作用应力场的光弹性模拟显示
Two problems are considered: The compatible of screw dislocations and visco-elastic fracture of edge interfacial blunt crack in bimaterial; The compatible of edge dislocations and visco-elastic-plastic fracture of blunt crack. 包括双材料边缘界面钝裂纹粘弹性断裂螺型位错相容原理;钝裂纹粘弹塑性断裂刃型位错相容原理。