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Electron Diffraction Study of the Local Atomic Arrangement in Amorphous Gallium Films 非晶镓薄膜中局部原子排列的电子衍射研究
T. Ichikawa
Thin films of amorphous gallium have been prepared by low temperaturecondensation in high vacuum, and a transmission electron diffraction study of them has been undertaken. A radial distribution analysis from the very diffuse halo patterns obtained has been carried out in order to investigate the local atomic arrangement in amorphous gallium. W(r) ( q(r)/q0) has been compared with W(r)'s calculated from several crystalline models, leading to the conclusion that the structure in question is considerably similar to highly disordered β-gallium. Dunne Schichten von amorphem Gallium werden durch Verdampfung im Hochvakuum auf mit flussigem Helium gekuhlten Substraten hergestellt und Elektronenbeugungsuntersuchungen durchgefuhrt. Eine Analyse der radialen Verteilung wurde durchgefuhrt, um die Nahordnung eines Atoms in amorphem Gallium zu untersuchen. Die gewonnenen W(r)-Werte werden mit den mit verschiedenen Kristallmodellen berechneten W(r)-Werten verglichen und geschlossen, das die Struktur von amorphem Gallium der von stark ungeordnetem β-Gallium sehr ahnlich ist.
(《高富市amorphous gallium》原创)一项高速转寄家庭如高速转寄家庭的常规分析应与当地考试委员会一致进行调查W (r) (q (r) / q0) W (r)在一种黑人compared " s calculated从several crystalline模特,引向何处to the conclusion这样戳的question is considerably similar to highly disorderedβ-gallium .通过在高真空状态使用放热氦气完成配电盘的淘汰。并进行电子运动研究。因此,研究人员对放射性分布进行分析,以确定吸取W (r)与许多Kristallmodellen -Werte颜色要与计算W (r)后的比较和密封的结构amorphem Gallium的急剧ungeordnetemβ-Gallium很ahnlich .
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引用次数: 22
Effective Interionic Pair Potentials and Properties for Liquid Sodium and Potassium(Physics) 液态钠和钾的有效离子间势及其性质(物理)
Y. Waseda, K. Suzuki
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引用次数: 1
Dislocation Motion in Antiferromagnetic γ-Fe-Mn Alloys 反铁磁γ-Fe-Mn合金中的位错运动
J. Echigoya
The plastic deformation of γ-FeMn alloys has been investigated by tensile and stress relaxation tests and transmission electron microscopy. The flow stress increases below the Neel temperature and reaches about 1 kp/mm2 at room temperature, but the activation volume and dislocation configuration do not change. This may be understood by the magnetic friction for dislocation motion in antiferromagnetic γ-FeMn alloys, which is associated with the newly-produced ferromagnetic coupling at the nearest neighbour site rather than a change of the deformation process. Die plastische Deformation der γ-FeMn-Legierungen wird mittels Dehnungs-, Spannungs-relaxations- und Elektronenmikroskop-Messungen untersucht. Die Fliesspannung nimmt unterhalb der Neel-Temperatur zu und erreicht ungefahr 1 kp/mm2 bei Raumtemperatur, das Aktivierungsvolumen und die Versetzungsanordnung andern sich jedoch nicht. Dieses Verhalten last sich durch magnetische Reibung gegen Versetzungsbewegung in den antiferromagnetischen γ-FeMn-Legierungen eher verstehen als durch Anderung des Deformationsprozesses.
塑料有明》γ-FeMn alloys中的黑人investigated tensile赞助和压力relaxation测试和传送electron microscopy .流动的压力已减轻了新生儿的发热和毛片的毛感但手术的作用和部署不需要改变This may be懂海滩的magnetic friction for dislocation motion在antiferromagneticγ-FeMn alloys是,建题为《associated newly-produced ferromagnetic coupling在the nearest neighbour网站的《a变化有明process .γ的美容科有明-FeMn-Legierungen会通过Dehnungs Spannungs-relaxations和Elektronenmikroskop-Messungen .调查在室温下增加了密度以保证在室温下这种行为更是由于磁性摩擦力和Versetzungsbewegung antiferromagnetischenγ-FeMn-Legierungen的理解而不是通过Anderung Deformationsprozesses .
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引用次数: 6
Vacancy Ordering in Vanadium Carbides Based on V_6C_5 基于V_6C_5的碳化钒中空位排序
K. Hiraga
Abstract The ordered arrangement of carbon vacancies in vanadium carbides near V6C5 has been analysed by means of selected-area electron diffraction and high-voltage electron microscopy. A new type of ordered distribution of carbon vacancies is found at non-stoichiometric compositions between V6C5 and V8C7. This structure can be expressed as a longperiod structure consisting of the enantiomorphic domains based on the structure V6C5 which was determined by Billingham. Bell and Lewis (1972). The periodic domain boundaries with spacing eleven times the nearest-neighbour interatomic distance are directly observed by electron microscopy.
摘要:用选择区电子衍射和高压电子显微镜分析了钒碳化物中V6C5附近碳空位的有序排列。在V6C5和V8C7之间的非化学计量成分中发现了一种新的有序碳空位分布。该结构可以表示为基于Billingham确定的V6C5结构的由对构畴组成的长周期结构。贝尔和刘易斯(1972)。用电子显微镜直接观察到间隔为最近邻原子间距离11倍的周期畴边界。
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引用次数: 34
Interionic Potentials in Liquid Metals Including Liquid Noble and Transition Metals(Physics) 液态金属(包括液态贵金属和过渡金属)的离子间势(物理学)
Y. Waseda, K. Suzuki
The Born-Green equation has been analyzed numerically to derive the effective interionic pair potentials from the structural data observed by X-ray or neutron diffraction experiments for liquid metals (Mg, Zn, Hg, Al, Ga, In, Tl, Sn, Pb, Sb, Bi), noble metals (Cu, Ag, Au), and transition metals (Fe, Ni) using a linearized simultaneous equation method. In all cases the potentials were found to be insensitive to temperature and to have long-ranged oscillations. But the damping behaviour of the oscillations for liquid Sb and Bi remarkably deviates from that of the usual metals such as liquid Na. For most metals, the wavelengths of oscillations observed in this work are in agreement with those expected from the electron theory of metals. The viscosity coefficient and surface tension were calculated. Adequate agreement with experiments was found. Fur die numerische Berechnung des effektiven, interionaren Paarpotentials flussiger Metalle (Mg, Zn, Hg, Al, Ga, In, Tl, Sn, Pb, Sb, Bi), Edelmetalle (Cu, Ag, Au) und Uber-gangsmetalle (Fe, Ni) aus gemessenen Strukturdaten durch Rontgenbeugung und Neutronenbeugung wird die Born-Greensche Gleichung durch Linearisierung des algebraischen Gleichungssystems analysiert. Es werden in alien Fallen temperaturunabhangige Potentiale vom langreichweitigen, oszillierenden Typ gefunden. Aber das Dampfungsverhalten der Oszillation von flussigem Antimon und Wismut weicht wesentlich von dem der normalen Metalle, wie dem des flussigen Na, ab. Die beobachtete Wellenlange der Oszillationen der anderen Metalle stimmt gut mit den aus der Elektronentheorie der Metalle erwarteten Werten uberein. Der Viskositatskoeffizient und die Oberflachenspannung werden berechnet. Ausreichende Ubereinstimmung mit den Experimenten wurde beobachtet.
本文采用线性化联立方程方法,从x射线或中子衍射实验中观察到的液态金属(Mg、Zn、Hg、Al、Ga、In、Tl、Sn、Pb、Sb、Bi)、贵金属(Cu、Ag、Au)和过渡金属(Fe、Ni)的结构数据,对Born-Green方程进行了数值分析,得出了有效离子间对势。在所有情况下,发现电势对温度不敏感,并且具有长范围振荡。但液态Sb和Bi的振荡阻尼行为与液态Na等常见金属的振荡阻尼行为明显不同。对于大多数金属,在这项工作中观察到的振荡波长与金属电子理论的预期一致。计算了黏度系数和表面张力。与实验结果充分吻合。本文研究了金属(Mg, Zn, Hg, Al, Ga, In, Tl, Sn, Pb, Sb, Bi),金属(Cu, Ag, Au),金属(Fe, Ni)等金属(Cu, Ag, Au),金属(Cu, Ag, Au),金属(Fe, Ni)等金属(Cu, Ag, Au)的结构分析方法。我们在外星降温中发现了不变化电位从langreichweitigen, oszillierenden类型gefunden。(1)在正常金属中,在金属中,在电子学中在金属中,在电子学中在电子学中在金属中,在电子学中在金属中,在电子学中在金属中,在电子学中在金属中,在电子学中在金属中。Der viskositatskoeffient和die Oberflachenspannung werden berechnet。[au:] [au:] [au:] [au:]
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引用次数: 24
Long Range Ordering of Interstitial Oxygen in Vanadium near V 4 O 钒在v4o附近间隙氧的长程有序
K. Hiraga, M. Hirabayashi
The crystal structure of interstitial solid solutions of vanadium with 14–23 at % oxygen has been determined by X-ray and electron diffraction. It is shown that the oxygen atoms occupy regularly the octahedral interstitial sites, forming a body-centered tetragonal superlattice of which the stoichiometry is approximately V 16 O 3 . The unit cell contains a 4×4×2 array of b.c.t. metal subcells with the axial ratio larger than unity. Both the cell dimensions of superlattice and sublattice increase of oxygen concentration. The superstructure is formed 400°C and transforms to another b.c.t. structure with preferential occupation of oxygen atoms like the Fe-C martensite above that temperature.
用x射线和电子衍射测定了钒- 14-23在%氧条件下的间隙固溶体的晶体结构。结果表明,氧原子有规律地占据八面体间隙位,形成了一个以体心为中心的超晶格,其化学计量量约为v16o 3。该单元格包含一个4×4×2数组的b.c.t.金属亚单元的轴比大于单位。超晶格和亚晶格的尺寸都随着氧浓度的增加而增加。上层结构在400°C时形成,并在400°C以上转变为另一种b.c.t结构,其氧原子优先占位,如Fe-C马氏体。
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引用次数: 20
The Crystal Data of Ternary Rare Earth Borides, RCo_2B_2 稀土三元硼化物RCo_2B_2的晶体数据
K. Niihara, T. Shishido, S. Yajima
Compounds with the composition of RCo2B2 (R=La, Nd, Sm, Gd, Tb, Dy, and Y) were prepared by arcmelting methods. Their crystal structure was investigated by means of X-ray diffraction. These ternary rare earth borides crystallize in the tetragonal lattice. The lattice parameters are a=3.616±0.003 A and c=10.215±0.005 A for LaCo2B2 and a=3.561±0.002 A and c=9.358±0.005 A for YCo2B2. The good agreement between the X-ray diffraction intensities observed and those calculated shows that the ternary borides, LaCo2B2 and YCo2-B2, crystallize in the ThCr2Si2-type structure. The crystallographic data obtained for LaCo2B2 and YCo2B2 are as follows: space group 14/mmm(D4h17); 2R in 2(a), 4Co in 4(d), and 4B in 4(e) with z∼3⁄8. The boron atoms in this structure are situated at the center of a trigonal prism formed by four rare earth atoms and two cobalt atoms. We also found the RCo2B2 compounds to be isostructural with LaCo2B2 and YCo2B2, where R=Nd, Sm, Gd, Tb, and Dy. However, efforts to prepare CeCo2B2 and ErCo2B2 ...
采用电弧熔炼法制备了RCo2B2化合物(R=La, Nd, Sm, Gd, Tb, Dy, Y)。用x射线衍射研究了它们的晶体结构。这些三元稀土硼化物在四方晶格中结晶。LaCo2B2的晶格参数为a=3.616±0.003 a和c=10.215±0.005 a, YCo2B2的晶格参数为a=3.561±0.002 a和c=9.358±0.005 a。x射线衍射强度与计算结果吻合较好,表明三元硼化物LaCo2B2和YCo2-B2以thcr2si2型结构结晶。得到的LaCo2B2和YCo2B2晶体学数据如下:空间群14/mmm(D4h17);2R在2中(a), 4Co在4中(d), 4B在4中(e), z ~ 3 / 8。这种结构中的硼原子位于由四个稀土原子和两个钴原子组成的三角棱镜的中心。我们还发现RCo2B2化合物与LaCo2B2和YCo2B2具有相同的结构,其中R=Nd, Sm, Gd, Tb和Dy。
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引用次数: 31
Interstitial Superstructures of Vanadium Deuterides 氘化钒的间隙超结构
H. Asano, M. Hirabayashi
The phase diagram and crystal structure of vanadium–deuterium alloys have been studied by means of neutron and X-ray diffraction as well as heat capacity measurements. In addition to a disordered solid solution (α-phase), the following three ordered phases have been found at relatively low temperatures, i.e. a β-phase or V2D superstructure (space group Cm or I41/amd) below 130°C, a γ-phase or V4D3 superstructure (Pcc2) below −125°C, and a δ-phase or VD1−x superstructure (Pnnn) below room temperature. Das Zustandsdiagramm und die Kristallstruktur von Vanadium–Deuteriumlegierungen wurden mit Hilfe von Neutronen- und Rontgen-Beugungsmethoden sowie durch Messung der spezifischen Warme untersucht. Auser der regellosen Mischkristallphase (α), werden die drei folgenden geordneten Phasen bei niedriger Temperatur gefunden: die β-Phase oder V2D-Uberstruktur (Raumgruppe Cm oder I41/amd) unterhalb 130°C, die γ-Phase oder V4D3-Uberstruktur (Pcc2) unterhalb −125°C und die δ-Phase oder VD1−x-Uberstruktur (Pnnn) unterhalb Zimmertemperatur.
该阶段的描述和水晶结构在加法to a disordered固体答案(α阶段)、《经验三ordered phases也可以找到在relatively低temperatures, i.e. aβ阶段or V2D superstructure (or I41太空集团Cm / amd) below 130°C, aγ阶段or V4D3 superstructure Pcc2 below(1−25°C, and aδ阶段or VD1−x superstructure Pnnn below总监(temperature .利用中子和rontto沉淀法进行分析,并对具体热的温度进行测量,研究了避热图和云达达合金的晶体结构。都在到处都Mischkristallphase(α),将三种有序阶段以低温度下发现:β阶段或V2D-Uberstruktur (Raumgruppe厘米或I41 / amd) 130°C以下γ阶段或V4D3-Uberstruktur (Pcc2)低于1−25°C和δ阶段或VD1−x-Uberstruktur (Pnnn)低于室温.
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引用次数: 70
The Behavior of Silicon and Aluminum in the Nitrofluor Process 硅和铝在硝基氟过程中的行为
A. Kigoshi, Mitsuo Ohmi
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引用次数: 0
On the Heat of Mixing of Liquid Copper Alloys 液态铜合金的混合热研究
S. Takeuchi, O. Uemura, S. Ikeda
{"title":"On the Heat of Mixing of Liquid Copper Alloys","authors":"S. Takeuchi, O. Uemura, S. Ikeda","doi":"10.2320/JINSTMET1952.37.8_834","DOIUrl":"https://doi.org/10.2320/JINSTMET1952.37.8_834","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"1 1","pages":"41-55"},"PeriodicalIF":0.0,"publicationDate":"1973-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88375103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
期刊
Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy
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