检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

钢铁中多元夹杂物颗粒的三维评估

冶金分析 2012年第8期32卷 1-8页

作者： ryo inoue KEI Kiyokawa KOICHIRO Tomoda SHIGERU Ueda TATSURO Ariyama 日本东北大学高级材料多学科研究所日本东芝纳米分析有限公司物理分析技术中心

为了从钢铁中提取各种夹杂物颗粒,考察了采用无水电解质的恒电位和恒电流的提取方法。结果认为,4%的MS[4%(V/V)甲基水杨酸-1%(m/V)水杨酸-1%(m/V)四甲基氯化铵-甲醇)和10%AA(10%(V/V)乙酰丙酮-1%(m/V)四甲基氯化铵-甲醇]电解质溶液适用... 详细信息

为了从钢铁中提取各种夹杂物颗粒,考察了采用无水电解质的恒电位和恒电流的提取方法。结果认为,4%的MS[4%(V/V)甲基水杨酸-1%(m/V)水杨酸-1%(m/V)四甲基氯化铵-甲醇)和10%AA(10%(V/V)乙酰丙酮-1%(m/V)四甲基氯化铵-甲醇]电解质溶液适用于提取钢铁中夹杂物TiOx和TiAl2O5。尽管这些电解提取法可以提取化学性能不稳定的夹杂物颗粒,然而,因为对夹杂物的观察是在萃取完成后于一个滤膜中进行,因此无法确定金属中每种夹杂物的具体位置。为了确定金属中夹杂物的具体位置,将卤-醇的光蚀刻方法用于以Ti和Al除氧的钢样品表面附近出现的夹杂颗粒,使用扫描电子显微技术和俄歇电子能谱(AES)对精细夹杂物颗粒形貌、尺寸和元素的偏析进行评估,不过卤醇却和钢铁中的金属钛和金属铝发生还原反应。对微小夹杂物颗粒的成分的形态、分离进行估测,然后,使用一种低加速能-扫描电子显微技术和俄歇电子能谱(AES)对用聚焦离子束制备微小夹杂物颗粒截面上元素的微观偏析进行评定。在这些研究结果基础上讨论了多元夹杂物颗粒的形成机理。

关键词：三维评估多元夹杂物光蚀刻俄歇电子能谱(AES) 聚焦离子束形成机理

Three-dimensional crystal defect imaging by STEM depth sectioning

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第8期33卷 2-7页

作者： ryo Ishikawa Naoya Shibata Yuichi Ikuhara Institute of Engineering Innovation The University of TokyoBunkyoTokyo 113-8656Japan

One of the major innovations awaiting in electron microscopy is full three-dimensional imaging at atomic *** the success of aberration correction to deep sub-angstrom lateral resolution,spatial resolution in depth is still far from atomic *** scanning transmission electron microscopy(STEM),this poor depth resolution is due to the limitation of the illumination *** overcome this physical limitation,it is essential to implement a next-generation aberration corrector in STEM that can significantly improve the depth *** review discusses the capability of depth sectioning for three-dimensional imaging combined with large-angle illumination ***,the statistical analysis approach remarkably improves the depth resolution,making it possible to achieve three-dimensional atomic resolution imaging at oxide *** will also discuss the future prospects of three-dimensional imaging at atomic resolution by STEM depth sectioning.

关键词： atomic-resolution STEM STEM depth sectioning depth resolution dopants surface topography

Fabrication of Mie-resonant silicon nanoparticles using laser annealing for surface-enhanced fluorescence spectroscopy

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第2期10卷 133-141页

作者： Tatsuya Fukuta ryo Kato Takuo Tanaka Taka-aki Yano Institute of Post-LED Photonics Tokushima University2-1 Minami-JosanjimaTokushima770-8506Japan Innovative Photon Manipulation Research Team RIKEN Center for Advanced PhotonicsWakoSaitama351-0198Japan Metamaterials Laboratory RIKEN Cluster for Pioneering ResearchWakoSaitama351-0109Japan

Silicon nanostructures with unique Mie resonances have garnered considerable attention in the field of ***,we present a simple and efficient method for the fabrication of silicon(Si)nanoparticle substrates using continuous-wave(CW)laser *** resulting silicon nanoparticles exhibit Mie resonances in the visible region,and their resonant wavelengths can be precisely ***,laser-annealed silicon nanoparticle substrates show a 60-fold enhancement in *** tunable and fluorescence-enhancing silicon nanoparticle platform has tremendous potential for highly sensitive fluorescence sensing and biomedical imaging applications.

关键词： nanoparticles annealing resonant

采用DEM-CFD组合模型研究高炉炉身煤气喷吹时炉内气固流动的动力学行为

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界钢铁 2013年第5期13卷 10-17页

作者： Shigeru Ueda Shungo Natsui ryo inoue Tatsuro Ariyama 徐辉东北大学多元物质科学研究所

为减少钢铁厂CO2排放,必须降低焦比。现在高炉炉身喷吹还原气被认为可降低焦比。但炉身喷吹煤气的效果由其在高炉内的穿透性决定。解析高炉炉身喷吹煤气的行为,可有效评价其在实际高炉中的效果。采用DEM-CFD组合模型研究了高炉炉身喷吹... 详细信息

为减少钢铁厂CO2排放,必须降低焦比。现在高炉炉身喷吹还原气被认为可降低焦比。但炉身喷吹煤气的效果由其在高炉内的穿透性决定。解析高炉炉身喷吹煤气的行为,可有效评价其在实际高炉中的效果。采用DEM-CFD组合模型研究了高炉炉身喷吹煤气的气固流动力学行为。考虑到气固间相互作用,采用DEM模型模拟炉料的准确分布。根据模拟结果,喷吹煤气的流动行为受填充床的透气性制约,且气体的穿透效果被限定在特定区域。除喷吹风口区域外,炉身等压面近似为水平面。喷吹煤气的流速对其在高炉内的穿透性有一定影响。然而,喷吹煤气所占横截面的面积与常规风口和炉身附加风口煤气量的比值相对应。炉身煤气喷吹被认为是控制炉身热流比的有效方法,但其难以与上升气流立刻混合。根据期望目标,需慎重选择喷吹位置。该结果可应用于顶煤气循环等新工艺的设计。

关键词：炼铁高炉炉身喷吹低还原剂操作离散元法计算流体力学炉顶煤气循环

α,β-Dehydroamino Acid Synthesis through Proline-Catalyzed Aldol Condensation with a Glycine Schiff Base

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Precision Chemistry 2024年第1期2卷 14-20页

作者： Jun Sawamura Daikan Ieiri ryo Yazaki Takashi Ohshima Graduate School of Pharmaceutical Sciences Kyushu UniversityFukuoka 812-8582Japan

A general protocol for the synthesis ofα,β-dehydroamino acids and their peptides was *** efficiently catalyzed an aldol condensation reaction of a glycine Schiff base with a variety of *** hydroxy group on the benzophenone imine was crucial for high Z/E selectivity and further transimination for protecting group-freeα,β-dehydroamino *** elongation of both the C-and N-terminals highlighted the usefulness of our present protocol.

关键词： α β-dehydroamino acid peptide proline aldol condensation glycine Schiff base transimination

Swimmer with submerged SiO_(2)/Al/LiNbO_(3) surface acoustic wave propulsion system

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Biomimetic Intelligence & Robotics 2024年第2期4卷 71-77页

作者： Deqing Kong ryo Tanimura Fang Wang Kailiang Zhang Minoru Kuribayashi Kurosawa Manabu Aoyagi Department of Engineering Muroran Institute of TechnologyMuroran 050-8585Japan Tianjin Key Laboratory of Film Electronic and Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Engineering Tokyo Institute of TechnologyYokohama 226-8501Japan

Acoustic propulsion system presents a novel underwater propulsion approach in small scale *** study introduces a submerged surface acoustic wave(SAW)propulsion system based on the SiO_(2)/Al/LiNbO_(3) *** 19.25 MHz,the SAW propulsion system is proposed and investigated by the propulsion force calculation,PIV measurements and propulsion measurements.3.3 mN propulsion force is measured at 27.6 V_(pp).To evaluate the miniature swimmer,the SAW propulsion systems with multiple frequencies are *** 2.2 W,the submerged SAW propulsion system at 38.45 MHz demonstrates 0.83 mN/mm^(2) propulsion *** 96.13 MHz and 24 V_(pp),the movements of miniature swimmer with a fully submerged SAW propulsion system are recorded and analyzed to a maximum of 177 mm/*** of miniaturization,high power density,and simple structure,the SAW propulsion system can be expected for some microrobot applications,such as underwater drone,pipelinerobotand intravascularrobot.

关键词： Acoustofluidics Surface acoustic wave Swimmer Underwater propulsion system

In situ observation of the phase transformation kinetics of bismuth during shock release

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第4期33卷 586-592页

作者：李江涛王倩男徐亮柳雷张航 Sota Takagi Kouhei Ichiyanagi ryo Fukaya Shunsuke Nozawa 胡建波 Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China State Key Laboratory for Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Japan Society for the Promotion of Science Tokyo102-0083Japan Institute of Materials Structure Science High Energy Accelerator Research OrganizationIbaraki305-8572Japan

A time-resolved x-ray diffraction technique is employed to monitor the structural transformation of laser-shocked *** reveal a retarded transformation from the shock-induced Bi-Ⅴphase to a metastable Bi-Ⅳphase during the shock release,instead of the thermodynamically stable Bi-Ⅲ*** emergence of the metastable Bi-Ⅳphase is understood by the competitive interplay between two transformation pathways towards the Bi-Ⅳand Bi-Ⅲ,*** former is more rapid than the latter because the Bi-Ⅴto B-Ⅳtransformation is driven by interaction between the closest atoms while the Bi-Ⅴto B-Ⅲtransformation requires interaction between the second-closest *** nucleation time for the Bi-Ⅴto Bi-Ⅳtransformation is determined to be 5.1±0.9 ns according to a classical nucleation *** observation demonstrates the importance of the formation of the transient metastable phases,which can change the phase transformation pathway in a dynamic process.

关键词： phase transformation time-resolved x-ray diffraction(XRD) bismuth metastable phase nonequilibrium phase diagram

在线全文

学校读者我要写书评

暂无评论

铁水预处理热力学研究

钢铁 1984年第8期 47-55页

作者：水渡英明吕湘提日本东北大学

近年来由于超低磷级钢种的需要量增加,由于为适应钢包精炼和连铸的需要而提高出钢温度,导致转炉脱磷负荷加重以及由于转炉渣的利用问题尚未圆满解决等原因,进行了关于铁水预处理的大量研究工作。本文从热力学方面讨论铁水脱硅和脱磷,... 详细信息

近年来由于超低磷级钢种的需要量增加,由于为适应钢包精炼和连铸的需要而提高出钢温度,导致转炉脱磷负荷加重以及由于转炉渣的利用问题尚未圆满解决等原因,进行了关于铁水预处理的大量研究工作。本文从热力学方面讨论铁水脱硅和脱磷,这不仅适用于铁水预处理,也适用于钢包精炼[1]。 1.渣-金属反应的研讨涉及Si,P,S,Mn的渣-金属的平衡,以分子形式表达如下:

关键词：铁水预处理铁水脱硅渣-金属反应钢包精炼热力学研究磷负荷出钢温度铁水预脱硅喷吹磷分配比

Three-dimensional evaluation of inclusion particles in steel

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Baosteel Technical Research 2010年第S1期4卷 119-页

作者： ryo inoue Kei KIYOKAWA Koichiro TOMODA Shigeru UEDA Tatsuro ARIYAMA Institute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai 980-8577Japan Physical Analysis Technology Center Toshiba Nanoanalysis Co. Kawasaki 212-8583Japan Planning Office Toshiba Nanoanalysis Co. Kawasaki 212-8583Japan

The estimation of inclusion particles has a relation close to the control of steel grain growth as well as the production of clean *** present study,the electrolytic extraction methods using nonaqueous electrolyte have been examined for the extraction of various inclusion particles,in order to evaluate their three-dimensional morphologies and compositional *** cross section of fine inclusion particle,which was prepared by focused ion beam method,was qualitatively analyzed using Auger electron *** the results obtained by this method,the formation mechanism of complex inclusion particle could be explained clearly.

关键词： inclusion particle extraction nonaqueous electrolyte three dimensional evaluation FIB Auger electron spectroscopy