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micro-twin
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  “micro-twin”译为未确定词的双语例句
     OBSERUATION AND CALCULATION OF FRINGE IMAGES OF OVERLAPPING MICRO-TWIN BOUNDARIES
     重叠微孪晶界面条纹象的电子显微镜观察与强度计算
短句来源
     The results show that the crack is caused by the interaction of three factors: 1. lots of hydrogen-rich austenite and micro-twin martensite (M-A) islands in granular bainite induce the delayed crack;
     文中提出,粒状贝氏体中大量的富氢微孪晶马氏体M-A小岛引起的延迟微裂纹;
短句来源
     It was essential for nucleation of alloy nanotube that there be many faults such as micro-twin, stacking fault, small-angle boundary, and rearrangement of atomic structure in cell area of 'quasi-fluid'. The suspension bond of alloy atom was fixed in the cell of 'quasi-fluid', and this provided structure factor and energy for the growth of nanotube.
     合金中存在的大量微孪晶、堆垛层错、小角晶界等缺陷以及"类流态"胞区内原子结构的重排是合金纳米管形核的关键,"类流态"胞区固定了合金原子的悬浮键,为纳米管的生长提供了结构因素和能量.
短句来源
  相似匹配句对
     Micro-accelerometer
     微加速度计
     MICRO-DYNAMOMETER
     微力测试仪
短句来源
     Micro Machining Process
     微细加工技术及其应用
短句来源
     Expectation of Micro Turbine
     微燃发电机展望
短句来源
     TWIN PARADOX
     孪生子佯谬
短句来源
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  micro-twin
But a small quantity of Al20Cr2Y coarse lumpish particles with micro-twin structures can be found, originating from lumpish particles of the coarse powders.
      
It was found by cross-section transmission electron microscopy that the islands have a complicated inner structure and consist of a micro-twin nucleus and semi-spherical nano-layers of various SiGe compositions.
      
The β phase is interpreted as a dynamic average of four micro-twin and -antiphase domains of the a phase.
      


Fringe images of overlapping micro-twin boundaries in a f.c.c. Ni-Cr alloy have been observed by trausmission electron microscopy. It is shown that the average intensity of the fringe images in the overlapping boundary is either much higher or much lower than that of the single boundary depending on the sign and value of the deviation parameters. The contrast of fringes will reverse when one changes the sign of deviation parameters for the matrix and/or the twin. Comparing with the well-known α-fringe...

Fringe images of overlapping micro-twin boundaries in a f.c.c. Ni-Cr alloy have been observed by trausmission electron microscopy. It is shown that the average intensity of the fringe images in the overlapping boundary is either much higher or much lower than that of the single boundary depending on the sign and value of the deviation parameters. The contrast of fringes will reverse when one changes the sign of deviation parameters for the matrix and/or the twin. Comparing with the well-known α-fringe and δ-fringe ,overlapping twin fringes have special features which may arise from the anomalous absorption-anomalous transmission effects and the dynamic multiple beam interference among the matrix-twin-matrix or twin-matrix-twin. Using Van Dyck's iterative method, simulation images were calculated which are in good agreement with experimental observations.

观察了面心立方镍基合金中重叠微孪晶界面的各种条纹象,发现它们与α 条纹及σ条纹不同,当改变基体或孪晶偏离参量的正负号时,重叠区域条纹的衬度会发生明显的改变,本文将多束动力学衍射理论的叠代法用于重叠孪晶界面几种条纹强度的模拟计算,计算束数包括基体、孪晶及其二次衍射在内共九束,计算的强度曲线与实验强度曲线符合良好,分析结果指出,重叠孪晶界面条纹衬度的明显变化是异常吸收或异常透射效应及基体-孪晶-基体三层晶体多束动力学交互作用的结果。

Zinc sulphide has a high-temperature stable structure at T>1024℃, i.e. wurtzite (2H) and a low-temperature stable structure at T<1024℃, i. e. sphalerite (3C). Much x-ray diffraction study of 2H-3C structure transformations were reported, but the study of 3C-2H structure transformations are little. Especially, the experimental investigations about the orientations of 3C-2H transformations by Laue diffraction haven't been seen as yet.In the present work,the stacking faults were introduced into 3C-ZnS single-crystals...

Zinc sulphide has a high-temperature stable structure at T>1024℃, i.e. wurtzite (2H) and a low-temperature stable structure at T<1024℃, i. e. sphalerite (3C). Much x-ray diffraction study of 2H-3C structure transformations were reported, but the study of 3C-2H structure transformations are little. Especially, the experimental investigations about the orientations of 3C-2H transformations by Laue diffraction haven't been seen as yet.In the present work,the stacking faults were introduced into 3C-ZnS single-crystals by heat treatment,the orientated relation of 3C-MT(micro-twin) -2H transformations was then investigated with Laue back reflection method. Specimens of ZnS single-crystals were prepared with vapour-grown method. It was found by means of x-ray diffraction that the crystallinity of the specimens is fine, and there is no stacking faults in ZnS crystals. The heat treatment condition. 1100℃,S vapour protecting the specimens, keeping crystals at high temperature 10 minutes to 5 hours, cooling the specimens in air. The x-ray condition. Cu radiation, 35kV, D = 37mm, taking Laue back reflection photographs of each specimen in fixed position before and after each heat treatment respectivly. After that, a lot of new Laue diffracted patterns which have not been reported in the literature were observed.In order to interpret these patterns, simple and suitable formulas to index Laue photographs and calculate "anomalous diffracted spots" have been derived, and the stereographic projections corresponding to some crystal planes also have been plotted. All of Laue diffracted spots and streaking in the Laue photographs were indexed and analysed.The results show that.1.For the heat treated 3C-ZnS single-crystals, the probabilities of the structure transformations along four<111>irections are equal. Therefore, the diffracted patterns of the structure transformations along four <111>irections can be observed simultaneously.On the other hand, because the crystal is not uniform, the minute difference of local temperature and the time of structure transformations are different, these made the development in the process of structure transformations along one direction, while the structure transformation along another directions are prohibited. Therefore, we have not only observed the diffracted patterns of structure transformations along four <111>irections at the same time, but also observed the patterns of transformation along one, two or three <111>irections.2.When the time of heat treatment is sufficient, the structure transformations go from four <111>irections to one <111>irection gradually. This explains that the structure transformations are produced in the heating process.3.After the heat treatments, the streaking extent of diffracted patterns in the Laue photographs show the strong disorder along one direction. In the transition of zinc sulphide 3C-2H, MT, micro-2H and the disorder layers arrange alternately and randomly, and the three structure are often produced together. On the other hand, the uniformity of the streaking extent along four <111>irections in the diffracted patterns show that the stacking faults, MT and micro-2H structure statistically distribute along four <111>irections.4.The method of Laue back reflection is an effective method to identify twin of HCP in an FCC matrix.

为了论证层错是硫化锌晶体中交流电致发光的一个必要条件,我们把3C-ZnS单晶体在1100℃热处理后引入了层错。同时,我们对热处理前后的结构,用劳埃背反射法和文献[8、13]推导的公式进行了分析。结果表明,沿3C-结构<111>四个等价方向都可以产生无序、孪晶和2H-结构,而且当热处理时间足够长时,结构转变趋向于一个<111>方向。这些实验结果,在有关的文献中尚未见到。

Microstructure and growth mode of diamond films by electron assisted CVD method have been studied by means of transmission electron microscopy. The results showed that grain size in diamond film, defect and the film growth mode are different to diamond films appearing different colour. There exists two typical microstructure in crystals of different diamond films,one is mainly five-fold twins, the other is mainly dislocation and micro twins coexisting.

本工作利用透射电镜对电子束增强热丝化学汽相沉积金刚石薄膜的微观结构及生长方式进行了研究。观察表明:外强颜色不同的金刚石膜,其内部晶粒尺寸、缺陷类型和生长方式也不同。主要归纳为两类:一类是以五次孪生方式生长;另一类是以位错和微孪晶共存生长。

 
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