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rapid nucleation
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  快速形核
     The formation of bainite crossing is caused by the shear stress strain induced bainitic transformation, and rapid nucleation and growth of shear deformation mechanism in inital period of bainitic transformation result in the formation of bainitic midribs.
     贝氏体交叉的形成是切变应力—应变诱发贝氏体转变引起,中脊是贝氏体相变初期切变机制快速形核与长大的结果。
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  相似匹配句对
     The nucleation of magnetite is rapid during forming.
     由于玻璃中存在很大的分相倾向 ,钙铁硅微晶玻璃中磁铁矿的核化是在成形冷却过程中完成的 ,核化速度很快 .
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     Homogeneous Nucleation Rate in Rapid Expansion of Supercritical Solution
     超临界溶液快速膨胀过程中的均相成核速率
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     With the rapid development of the
     愿本文能为《公司法》的修改稍尽微薄之力。
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     It is rapid, simple.
     本法出结果快、操作简便。
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     Nucleation of CVD Diamiond
     CVD金刚石的成核机理研究
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  rapid nucleation
The transient phenomena of the martensitic transformations in nanocrystalline Ti is ideally suited for study in the DTEM, with their rapid nucleation, characteristic interface velocities ~1 km/s, and significant irreversible microstructural changes.
      
The solvent-assisted transition normally proceeds by rapid nucleation followed by growth of these nuclei.
      
The particle size and distribution were consistent with formation of liquid particles by rapid nucleation and surface reaction followed by growth by coalescence of droplets.
      
In this study we sought to determine whether the increased biliary concentration of AAG in cholesterol gallstone patients is accompanied by a more rapid nucleation time in patients with multiple stones.
      
In particular, the rapid nucleation and crystallization of ZSM-5 zeolite under microwave irradiation made it possible to enable the continuous microwave synthesis, implying a great industrial and technological importance.
      
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Different microstructure and fine structure in quasi lower bainite of 40CrMn2Si2Mo cast steel has been studied by SEM and TEM. Some martensite like bainites such as crossed type and midrib type in the alloy were investigated. A large number of faults was observed in quasi lower bainitic midribs. The formation of bainite crossing is caused by the shear stress strain induced bainitic transformation, and rapid nucleation and growth of shear deformation mechanism in inital period of bainitic transformation...

Different microstructure and fine structure in quasi lower bainite of 40CrMn2Si2Mo cast steel has been studied by SEM and TEM. Some martensite like bainites such as crossed type and midrib type in the alloy were investigated. A large number of faults was observed in quasi lower bainitic midribs. The formation of bainite crossing is caused by the shear stress strain induced bainitic transformation, and rapid nucleation and growth of shear deformation mechanism in inital period of bainitic transformation result in the formation of bainitic midribs. There exist faults in bainitic midribs, which is a proof of shear transformation mechanism in bainite formation.

利用电镜研究了40CrMn2Si2Mo铸钢准下贝氏体中变态组织及精细结构。观察到交叉型、中脊型类马氏体形貌贝氏体,发现贝氏体中脊中有大量层错。贝氏体交叉的形成是切变应力—应变诱发贝氏体转变引起,中脊是贝氏体相变初期切变机制快速形核与长大的结果。中脊中层错的存在,为贝氏体相变过程存在切变机制提供了依据。

Supercritical fluid precipitation (SFP) technologies, such as RESS and SAS, are novel micronization processes having promising applications in various fields such as inorganic chemistry, organic chemistry and pharmaceuticals. RESS consists of saturating a supercritical fluid (SF) with the substrate(s), then depressurizing the solution through a nozzle into a low-pressure chamber to cause an extremely rapid nucleation of the substrate(s) in the form of very small particles. SAS consists of decreasing the...

Supercritical fluid precipitation (SFP) technologies, such as RESS and SAS, are novel micronization processes having promising applications in various fields such as inorganic chemistry, organic chemistry and pharmaceuticals. RESS consists of saturating a supercritical fluid (SF) with the substrate(s), then depressurizing the solution through a nozzle into a low-pressure chamber to cause an extremely rapid nucleation of the substrate(s) in the form of very small particles. SAS consists of decreasing the solvent powder of a liquid solvent in which the substrate is dissolved by saturating it with a SF, resulting in the substrate precipitation or recrystallization. Based on RESS and SAS, some improved SFP technologies, such as AESE, SEDS and SAS |EM have been developed to obtain smaller particles. ;AESE process involves spraying the solution through a nozzle as fine droplets into SF anti |solvent. SEDS, an improvement of ASES, consists of using a nozzle with two coaxial passages to achieve smaller droplets and intense mixing of SF and solution for increased transfer rates. SAS |EM, a modification of SAS, depends on deflecting the solution jet by a surface vibrating at an ultrasonic frequency that atomizes the jet into small micro droplets. A sintered porous plate or ‘frit’ nozzle, which could be manufactured more easily and was unlikely to be plugged due to blockage by the presence of a single particle in comparison with capillary nozzles, was used in RESS process. Specialized nozzles are used in AESE to generate and focus the preferred high frequency sonic waves that have been shown to maximize the production of extremely small droplets in the precipitation zone, leading to the precipitation of the very small particles. ;In this review, the concepts, characteristics and the related application of the SFP processes are introduced, and current issues relating to the SFP processes are addressed.

超临界流体沉淀 (简称 SFP)技术以其特有的优点成为引人注目的在无机化学、有机化学、医药等领域具有广阔应用前景的超细微粒制备方法。为充分发挥 SFP技术的优势 ,科研工作者以 RESS与 SAS为基础提出了 ASES、SEDS、SAS- EM等各种新技术。本文着重综述了以 RESS及 SAS为基础发展起来的SFP新技术的原理、特点及相关的应用 ,指出了目前 SFP技术存在的问题及今后的研究方向。

 
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