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台阶式生长
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  a step growth
     Based on the crystal growth theory, it was considered that the growth element of the primary TiB 2 is the trigonal prism of six Ti atoms with one B atom at the center, and the primary TiB 2 grows mainly in a step growth method.
     结合晶体生长理论分析认为 :Ti B2 的生长单元为一个硼原子和六个钛原子组成的三棱柱 ,硼原子位于三棱柱的中心 ,生长方式以台阶式生长为主。
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  “台阶式生长”译为未确定词的双语例句
     The nucleation of C_(60) crystals is similar to that of metals and it is considered to be as step growth.
     分析表明,C_(60)晶体的形核方式与金属形核类似,其生长方式为台阶式生长
短句来源
     The result of this experiment indicates two conclusions,one of which is that concentric annuluses appearing in PHB spherocrystal in orthogonal polarized light are as a result of difference in height of 200nm~500nm between growth steps by reason of step-like or auger-type growing of PHB spherocrystal.
     结果发现:实验用的PHB球晶是台阶式生长或螺旋式生长,其生长台阶高度差在200nm~500nm之间;
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  相似匹配句对
     Review on advance in stepped spillway studies
     阶式溢洪道的研究与发展
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     The Thinking About the House with Stepped Garden
     阶式花园住宅的思考
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     INFORMATION AND NEWS
     信息
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     EXPOSURE
     曝光
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     Growth of Order
     秩序的生长
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  a step growth
A series of hydrophobically modified ethoxylated urethanes (HEURs) were synthesized by a step growth polymerization of polyethylene glycol with dicyclohexylmethane diisocyanate (H12MDI).
      
Dairy farming in DIY Province saw a step growth with Warga Mulya dairy Cooperative and its services during the period of 1979-1985.
      


A vapor transport technique with a flowing helium gas carrier has been used to produce high quality C_(60) single crystals with size of millimeters,X-ray diffraction result indicated that the crystal is the face-centered cubic(fcc)structure with lattice parameter of 1.4149nm. The nucleation of C_(60) crystals is similar to that of metals and it is considered to be as step growth.

本文采用气相传输方法,以氦气作为传输载体,生长了线度为毫米量级的C_(60)单晶体。X射线衍射分析结果证明,该单晶为fcc结构,晶格常数为1.4149nm。分析表明,C_(60)晶体的形核方式与金属形核类似,其生长方式为台阶式生长

Ti 40Al 2B(wt%) alloy was produced successfully by an in situ method. The microstructure and the phase constitution, especially the morphology of the primary TiB 2 of this alloy were investigated by XRD and SEM. The results show that this alloy is composed of TiAl and TiB 2. TiB 2 mainly exists in the matrix with block primary TiB 2 and plate or fine bar shape eutectic TiB 2.The primary TiB 2 is hexagonal prism morphology. Clear growth steps were observed at the top of the primary TiB 2, and the...

Ti 40Al 2B(wt%) alloy was produced successfully by an in situ method. The microstructure and the phase constitution, especially the morphology of the primary TiB 2 of this alloy were investigated by XRD and SEM. The results show that this alloy is composed of TiAl and TiB 2. TiB 2 mainly exists in the matrix with block primary TiB 2 and plate or fine bar shape eutectic TiB 2.The primary TiB 2 is hexagonal prism morphology. Clear growth steps were observed at the top of the primary TiB 2, and the crystal faces were determined to be (0001) and {101-0}. Based on the crystal growth theory, it was considered that the growth element of the primary TiB 2 is the trigonal prism of six Ti atoms with one B atom at the center, and the primary TiB 2 grows mainly in a step growth method. The growth rate of {112-1} faces is the fastest and that of {101-0} is the slowest, which results in a hexagonal prism TiB 2 with {101-0} as prismatic faces.

用原位自生法制备了 Ti- 40 Al- 2 B(wt% )复合材料 ,并用 XRD、SEM对复合材料的相组成和微观组织 ,特别是 Ti B2 的形貌进行了研究。结果表明 :该合金由 Ti Al和 Ti B2 两相组成。其中 Ti B2 颗粒以初生的块状和共晶的片状或细棒状形式共存。初生 Ti B2 呈六面棱柱体 ,端面有清晰的生长台阶 ,其显露晶面分别为 (0 0 0 1)和 { 10 1- 0 }。结合晶体生长理论分析认为 :Ti B2 的生长单元为一个硼原子和六个钛原子组成的三棱柱 ,硼原子位于三棱柱的中心 ,生长方式以台阶式生长为主。其中 { 112- 1}面生长速率最快 ,{ 10 1- 0 }面生长速率最慢 ,导致 Ti B2 形成以 { 10 1- 0 }面为棱柱面的六面棱柱结构

In order to understand the kinetic character of 123 phase formation in PMP samples, the front microstructure of the peritectic reaction was investigated by SEM and a plate form growth was found. As the elevation speed ranges from 1 to 4 mm·h -1 , the sample can grow in planar form. The fine 211 phase particles are piled up evenly in front of the growing front. The concentration of Y in the liquid phase near the 211 phase particles is considerably higher than the average value in the liquid phase. The...

In order to understand the kinetic character of 123 phase formation in PMP samples, the front microstructure of the peritectic reaction was investigated by SEM and a plate form growth was found. As the elevation speed ranges from 1 to 4 mm·h -1 , the sample can grow in planar form. The fine 211 phase particles are piled up evenly in front of the growing front. The concentration of Y in the liquid phase near the 211 phase particles is considerably higher than the average value in the liquid phase. The slower the elevation speed is, the more tidily the reaction front grows, the larger the 211 phase particles are at the same time. Because, when the elevation speed is low, the sample needs longer time to pass through the melt zone, which leads more liquid phase lost and thus the 211 phase particles can grow easier. Along the c axis direction, the interface between 123 phase and liquid phase is not as tidy as ab plane. Near the 123 base in liquid phase, a "temporary" phase was found, in which, the concentration of Y is various, but it is higher than in the liquid and lower than that in the 123 phase. The front stage growing form was found for the first time and it is very thin about 2~3 μm.To analyse the concentration of Y in the liquid phase, the line scan method was used between the 211 phase particles and liquid phase. It was found that the original concentration of Y in the liquid phase in PMP sample is very low. As the melting time extends, the concentration increases considerably. Keeping the PMP samples in a certain temperature for enough time, the concentration of Y in the liquid is even. The diffusion distance is about 1 μm and the 123 phase may nucleate within this distance. When the diffusion gets balance, further increasing the melting temperature does little effect on the concentration of Y in the liquid.

通过扫描电镜 (SEM)观察了PMP样品的结晶前沿形貌 ,并发现了平面式生长方式。提拉速度从 1~ 4mm·h- 1 ,样品的生长方式均为平面式生长。提拉速度慢的样品结晶前沿较平整 ,但 2 11粒度明显增加。沿c轴方向生长界面没有沿ab方向平整 ,离基体较近的液相中有临时相出现 ,并首次发现台阶式生长方式。台阶非常细小 ,大约 2~ 3 μm。PMP样品Y在液相中的起始浓度很低 ,随着保温时间的延长 ,Y的浓度明显增加。Y的扩散距离为 1μm左右 ,12 3相很可能在距离 2 11相 1μm的范围内形核。

 
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