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原子
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  atom
    Calculation and Measurement of Substitutional Atom Diffustion in Dissimilar A P Steel Weld Bond
    A-P异种钢焊接熔合区中置换式原子扩散的计算和测定
短句来源
    The X-ray diffraction of samples sintered at different temperature show that in the sample sintered at 750 ℃ the most part of iron atom entered into the lattice of SnO2. It indicated that the material turned into SnO2(0.9)-Fe2O3(0.1) solid solution .
    XRD结构分析表明,在750℃焙烧温度下制得的粉体材料中铁原子大部分进入SnO2晶格中,以SnO2(0.9)-Fe2O3(0.1)固溶体状态存在.
    The ZCO powders with atom ratio Zn/(Zn+Ce)=0.2, prepared by inorganic polymer combustion route, were in the size of around 10nm. The UV-Vis spectra, UV irradiation catalysis and oxidation catalysis were evaluated experimentally. The results are compared with those of TiO2, ZnO and/or CeO2 powders.
    用无机聚合物凝胶燃烧法化学控制合成的纳米颗粒平均粒径约为10nm,原子比(Zn/(Zn+Ce))为0.2.实验评价了ZCO粉体的Uv-Vis光谱、紫外光光催化、氧化催化性能,并分别与TiO2、ZnO、CeO2进行了对比.
    80.7W-13. 2Ni-6.1Fe(atom percent)from the elemental powders of W, Ni and Fe were mechanically alloyed (MA).
    W、Ni、Fe粉末按照80.7W-13.2Ni-6.1Fe的原子分数(质量分数(%)为93W-4.9Ni-2.1Fe)进行了机械合金化(MA),制备了W-Ni-Fe合金纳米晶和非晶相的混晶结构。
    The research results show that the ZrB2 atom position is B atom a(-0.33023,0.32535,-0.48309);
    结果表明ZrB2原子占位为B原子a(-0.33023 0.32535 -0.48309);
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  interatomic
    The interatomic interactions are described by a Tersoff-Brenner potential, and the interaction force between the carbon nanotube and the rigid wall is approximated by the ‘6~12’ Lennard-Jones potential.
    在分子动力学模拟中 ,采用Tersoff Brenner势描述碳管的原子间相互作用 ,用 6~ 12形式的Lennard Jones势描述碳管与刚性壁间相互作用 .
短句来源
    2. Computational simulation in nano size alloy systemChapters, We applied an approach to the development of many-body interatomic potentials for NiTi, NiZr alloys, The database used for the development of a potential includes both experimental data and a large set of energies of different structures of the material generated by DFT calculations.
    通过用DFT详细地对NiTi二元合金簇的研究导出其原子间相互作用并加以模拟研究纳米晶界结构与稳定性,结果表明DFT导出的相互作用函数更适合研究纳米材料晶界或非晶纳米合金行为,而用经验势能函数的模拟纳米合金相变有很好的模拟结果。 这反映出原子间相互作用的不足,需要加以修正以满足普适的要求。
短句来源
    Chapter 3 focuses on the impact of carbon nanotubes with a rigid wall with help of molecular dynamics simulations, where the interatomic interactions are described by a Tersoff-Brenner potential and the interactions between the atoms of carbon nanotubes and the rigid wall are approximated by the ‘6-12’ Lennard-Jones potential.
    (2) 用分子动力学方法模拟碳纳米管与刚性壁的正碰撞过程,并与弹性动力学方法的分析结果进行对比。 在分子动力学模拟中,采用 Tersoff-Brenner 势描述碳纳米管的原子间相互作用,用 6-12 形式的 Lennard-Jones 势描述碳纳米管与刚性壁间相互作用。
短句来源
    With Embedded Atom Method, the plane MD model can study the crack propagation in nano metal slab, and the simulation results agree remarkably well with macro fracture mechanics method in which the elastic constants were obtained from the interatomic potential functions and the two-dimensional triangular lattices.
    结合原子镶嵌势的二维模型能准确地模拟平面纳观裂纹的扩展,揭示在远场应力作用下裂纹区原子的运动规律和应力、能量变化过程; 同一问题也可以通过原子镶嵌势函数和二维正三角形晶格常数计算材料的弹性参数并结合宏观断裂理论求解;
短句来源
    Therelation between exchange integral deviation parameter Δ and standard devia-tion S of Fe-Fe interatomic distance is linear,indicating electrostatic natureof exchange interactioins between spins in neihboring atoms.
    实验点落在布里渊曲线之下。 交换积分偏差参数△与 Fe-Fe 原子间距的标准偏差 S 呈线性关系,表明近邻原子自旋间的交换作用的静电性质。
短句来源
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  atomic scale
    STRUCTURES AND PROPERTIES OF METALLIC NANOWIRES IN ATOMIC SCALE
    原子尺度金属纳米线的结构和性质
短句来源
    Submicron in situ TiB 2 particulars were precipitated in Ti Al B by XD process The interfacial structures on the atomic scale were studied by HREM High temperature mechanical properties were measured Results show that the interface is atomically clear,smooth and free from any interfacial phases At 250℃,the tensile strength, yield strength, and elongation of the composites is up to 300MPa,230MPa,13% respectively
    采用XD 工艺在Ti-Al-B体系中可原位自生出亚微米级TiB2 颗粒增强相, 借助高分辨扫描电镜分析了原子尺度上的TiB2P/铝基体界面结构, 并测量了复合材料的高温力学性能。 结果表明, 其界面清洁, 匹配理想, 在250℃的抗拉强度、屈服强度、延伸率分别达300MPa, 230MPa, 13% 。
短句来源
    Atomic Scale Simulations of Nanoindentation
    原子尺度的纳米压痕模拟技术
短句来源
    The variation of indenter-radius size will affect the stress distribution under the indenter, and the viscoelasticity at atomic scale makes the simulation results (for example, the indent depth, the load and the maximum shear stress when dislocation nucleates) dependent on the loading speed.
    模拟结果表明:在原子尺度材料表现出一定程度的滞弹性,会对纳米压入的结果带来影响,本文采用的解决方法是在卸载前让系统充分地松弛;
短句来源
    So that, construction of nanostructured materials based on molecular or atomic scale must be become more attraction for scientists in chemistry, physics, materials, information fields, and so on.
    因此基于分子或原子水平上的纳米结构单元的构筑与合成则必然成为化学,物理学,材料科学,信息科学等领域的科学家所密切关注的对象。
短句来源
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  “原子”译为未确定词的双语例句
    AN INVESTIGATION OF Ag-Au-Zn ALLOYS WITH 50 AT. % Zn
    含有50原子%Zn的Ag-Au-Zn合金的研究
短句来源
    EFFECT OF HYDROGEN ON YOUNG' S MODULUS AND COHESIVE ENERGY OF Ti-15Mo ALLOY
    氢对Ti-15Mo合金弹性模量及原子间结合能的影响
短句来源
    EXAFS Study of Local Structure in Amorphous Alloys Cu-Zr,Cu-Ti
    Cu-Zr,Cu-Ti非晶态合金原子近邻结构的EXAFS研究
短句来源
    INVESTIGATION OF PHOSPHOROUS BULK DIFFUSION IN Ni_(84)P_(16)AMORPHOUS ALLOY BY MEANS OF AES
    用表面偏析法研究磷原子在Ni_(84)P_(16)非晶合金中的扩散
短句来源
    DIFFUSIVITY OF AI IN AMORPHOUS ALLOY Fe_(78)Si_9B_(13)
    Al原子在非晶合金Fe_(78)Si_9B_(13)中的扩散
短句来源
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  atom
Flavonoid antioxidants act as scavengers of free radicals by rapid donation of a hydrogen atom.
      
Also, the amino acid α-C atom radial distribution indicated that, with larger peripheral groups, more back-folding of the dendrimers occurred.
      
Based on the property that energy of most atoms is highly concentrated, an algorithm is proposed to fast reconstruct an image from atoms' parameters by limiting atom reconstruction calculating within the atom energy concentrating area.
      
Moreover, methods for fast calculating atom energy and normalization are also put forward.
      
Theory of Atom Optics: Feynman's Path Integral Approach
      
更多          
  interatomic
Interatomic Potentials for Structural Modeling of Double Alkali-Metal Zirconium Orthophosphates
      
The formation of amorphous structures with an increasing number of atoms in a complex is simulated using an explicit form of the interatomic potential.
      
The atomic coordinates and interatomic distances are reported.
      
The anharmonicity of particle vibrations and the nonlinearity of interatomic interaction forces in vitreous oxides and oxyhalides are considered in the framework of the free volume concept.
      
The relation of the critical strains of the interatomic bonds and the volume strain of the glass network to the lattice Grüneisen parameter is analyzed.
      
更多          
  atomic scale
The suppression of the spatial dispersion of D(q,ω) near the Anderson transition up to the atomic scale confirms the asymptotic validity of the Vollhardt-W?lfle approximation: D(q,ω)?D(ω) as |t|→0 and ω→0.
      
Precise atomic scale studies of material sputtering by light-ion gases in the prethreshold energy region
      
M?ssbauer spectroscopy and the structure of interfaces on the atomic scale in metallic nanosystems
      
It is argued that both thermodynamic and kinetic effects contribute to this result, at least on a quasi-atomic scale.
      
The products obtained are polymers in which metal cations are distributed homogenously on atomic scale that ensure high reactivity to cations of Li+ and Mn2+.
      
更多          


A β superlattice structure, with the ideal stoichiometrical formula AgAuZn2 and isoinorphous with that of Heusler alloys, has been found existing over a quite wide range of composition. It is, in fact, a superstructure of the β ordered structure. Its formation is accompanied by a sudden lattice contraction. The effect of gradual substitution of Ag by An on the atomic distribution has been stndied systematically. It is shown that the Au atoms introduced simply replace the Ag atoms more or less in a random manner,...

A β superlattice structure, with the ideal stoichiometrical formula AgAuZn2 and isoinorphous with that of Heusler alloys, has been found existing over a quite wide range of composition. It is, in fact, a superstructure of the β ordered structure. Its formation is accompanied by a sudden lattice contraction. The effect of gradual substitution of Ag by An on the atomic distribution has been stndied systematically. It is shown that the Au atoms introduced simply replace the Ag atoms more or less in a random manner, the positions of Zn atoms not being affected. Tho decrease of the degree of order as deviating from the stoichiometrical formula is not merely due to the deviation from the ideal chemical composition; some disordering among the Ag and Au atoms also occurs. High temperature investigation of Ag-rieh alloys shows that the temperature of β'-β transformation increases with Au content and that the β-phase structure exists only at high temperatures. The presence of even a minute amount of Au stablizes the β' structure obtained by quenching very remarkably. On the other hand, the β' structure of Au-rich alloys persists from room temperature probably to the melting point.

合金AgAuZn_2具有一个与郝斯勒合金同晶型结构的β″相,这个β″相存在于一个相当广阔的成分范围里。事实上,β″相就是β′有序结构的超结构。伴随着,β″结构的形成晶格发生突然的收缩。关于Ag-Au替换对于原子分布的影响,也作了系统的观察。在Ag-Au替换过程中,Au和Ag的替换或多或少是无规律性的,但Zn原子则仍保持它们的适宜位置,而不受到影响。当成分偏离于理想化学式AgAuZn_2时,有序度的减小不仅仅是由于化学成分的乖异,而且Ag-An替换也产生了一些无序的排列。高温观察的结果指出:Ag多合金的β′-β转变温度随着Au含量的增加而升高,而β相只能在高温度存在。少量的Au大大地提高了由淬炼而得到的β′相的稳定度。但是Au多的合金无论是在室温和高温都是具有β′结构的。

Fatigue experiments under constant torsional strain were carried out with an Al-4% Cu alloy. The energy loss △E was found to decrease to about zero in the initial stage of experiment, and to rise again after a certain number of cyclic loading. Results of metallographic observation showed that corresponding to the up-rise of △E, the slip regions became suddenly localized. These observations confirmed our previous assumption that the appearance of localized coarse slip regions is one of the basic processes giving...

Fatigue experiments under constant torsional strain were carried out with an Al-4% Cu alloy. The energy loss △E was found to decrease to about zero in the initial stage of experiment, and to rise again after a certain number of cyclic loading. Results of metallographic observation showed that corresponding to the up-rise of △E, the slip regions became suddenly localized. These observations confirmed our previous assumption that the appearance of localized coarse slip regions is one of the basic processes giving rise to △E.

用Al-4%Cu合金进行了恆应变扭转疲劳试验,观察到ΔE在起始阶段下降直至接近零值,经过一定的疲劳循环数以后又重新上升。金相观测的结果指出,ΔE的重新上升对应着滑移区的突然变得集中。这有力地证明了我们以前所作的假设,即局部化滑移区的出现是引起ΔE的一种基本过程。 在疲劳载荷下的Tm在超始阶段上升,但上升至最高值并保持此值经过一定的疲劳循环数以后,出现骤然的下降,这正对应着ΔE的重新上升。这种现象的出现可能是反映着在前期疲劳载荷下被钉紥的位错得到了骤然的解脱。 初步认为,位错的被钉紥和随后得到解脱的过程,是由于在疲劳初期所形成的溶质铜原子气团沿着位错线的某些有利地段富集成核,同时使位错线上的另一些地段从溶质原子中解脱出来。随着富集核的逐惭增大,和其间的得到了解脱的位错段的长度的逐渐增加到某一临界值,便在疲劳载荷下出现了位错“雪崩”的现象,产生了大量的新位错,这使Tm骤然降低,并且导致局部滑移地区的形成,从而使ΔE重新增加。

Internal friction peaks in two types of pure silver and six types of silver alloys were investigated with a torsion pendulum of about 1 cps. Comparisons were made on the variations of internal friction of both single and polycrystalline specimens of different compositions before and after different degrees of internal oxidation.

用频率约为1周/秒的扭摆,测量了99.99%和99.95%两种纯银以及99.99%纯银分别加入0.01%、0.02%、0.05%、0.15%、0.5%铝和99.95%纯银加入0.5%铝的六种合金的内耗。并且,还比较了三种合金的多晶和其中一种合金的单晶在内氧化前和后,以及经过不同时间的内氧化处理后的内耗变化。 实验的结果表明:(1)99.99%纯银试样在空气中测量,升温过程中在130℃左右出现一个内耗峯,从高温作降温测量这个峯不再明显地出现。(2)99.95%纯银试样和99.99%纯银加有少量铝的三种合金试样,在空气中作升温测量,都出现两个明显的内耗峯。低温峯出现在130℃到260℃的范围内,高温峯出现在380℃到430℃的范围内。这两种内耗峯的高度和巅值温度都随杂质含量的多少而改变。从高温作降温测量,高温峯可以重复出现,而低温峯就不再出现。加入合金元素一方面会引起一个新的高温峯,另一方面它又起着抑制低温峯出现的作用。当铝含量超过0.05%(即0.2原子%)时,就只出现一个高温峯。实验的结果指出,低温峯和氧在银中存在时的状态有关,可能是由于晶界上Ag_2O的变化导致晶界结构状态和空位的平衡浓度的改变...

用频率约为1周/秒的扭摆,测量了99.99%和99.95%两种纯银以及99.99%纯银分别加入0.01%、0.02%、0.05%、0.15%、0.5%铝和99.95%纯银加入0.5%铝的六种合金的内耗。并且,还比较了三种合金的多晶和其中一种合金的单晶在内氧化前和后,以及经过不同时间的内氧化处理后的内耗变化。 实验的结果表明:(1)99.99%纯银试样在空气中测量,升温过程中在130℃左右出现一个内耗峯,从高温作降温测量这个峯不再明显地出现。(2)99.95%纯银试样和99.99%纯银加有少量铝的三种合金试样,在空气中作升温测量,都出现两个明显的内耗峯。低温峯出现在130℃到260℃的范围内,高温峯出现在380℃到430℃的范围内。这两种内耗峯的高度和巅值温度都随杂质含量的多少而改变。从高温作降温测量,高温峯可以重复出现,而低温峯就不再出现。加入合金元素一方面会引起一个新的高温峯,另一方面它又起着抑制低温峯出现的作用。当铝含量超过0.05%(即0.2原子%)时,就只出现一个高温峯。实验的结果指出,低温峯和氧在银中存在时的状态有关,可能是由于晶界上Ag_2O的变化导致晶界结构状态和空位的平衡浓度的改变而引起的。高温峯可能是由于富集在晶界或亚晶界处的合金元素,在一定温度的交变应力下向晶粒内扩散和反扩散所引起的。(3)经过内氧?

 
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