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x-ray powder    
相关语句
  x射线粉末
    STUDY ON THE CRYSTAL STRUCTURE OF Bi_4(SiO_4)_3 BY X-RAY POWDER DIFFRACTION
    Bi_4(SiO_4)_3晶体结构的X射线粉末衍射研究
短句来源
    The effects of iron substitution on the crystal structure and magnetic properties of SmCo6.8-xFexHf0.2 (x=0.1, 0.3, 0.5, and 0.7) compounds were investigated by means of X-ray powder diffraction and magnetic measurements.
    本文通过X射线粉末衍射和磁性测量研究了Fe部分替代Co对SmCo6.8-xFexHf0.2(x=0.1,0.3,0.5, 0.7)化合物的晶体结构和磁性能的影响。
    1. The 673K isothermal section of La-Ni-Sn ternary systemThe phase relationships in the La-Ni-Sn ternary system at 673K have been investigated by means of x-ray powder diffraction (XRD), differential thermal analysis (DTA), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA).
    本文采用X射线粉末衍射、差热分析、金相分析、扫描电镜分析及电子探针等实验手段主要测定了La-Ni-Sn三元系673K时的相关系,发现该体系在673K时存在一个新的三元化合物,其组分的原子比为La:Ni:Sn=1:1:3。
短句来源
    The isothermal section of the phase diagram of the Er-Mn-Ni ternary system at 803K has been investigated by X-ray powder diffraction with the aid of DTA and OM techniques.
    本研究主要用X射线粉末衍射分析法,辅助差热分析法和金相分析法对Er-Mn-Ni三元系合金相图803K等温截面进行了研究。
短句来源
    Phase equilibria in the Gd-rich Gd-Ge-Si ternary system (Gd ≥40at.%) at 900 ℃ were investigated by X-ray powder diffraction and DSC.
    本文主要采用X射线粉末衍射法,差示扫描量热法(DSC)和差热分析法(DTA)研究了Gd-Ge-Si三元系富Gd(Gd≥40at.%)合金900℃等温截面的平衡相图。
短句来源
更多       
  x射线粉末衍射
    STUDY ON THE CRYSTAL STRUCTURE OF Bi_4(SiO_4)_3 BY X-RAY POWDER DIFFRACTION
    Bi_4(SiO_4)_3晶体结构的X射线粉末衍射研究
短句来源
    The effects of iron substitution on the crystal structure and magnetic properties of SmCo6.8-xFexHf0.2 (x=0.1, 0.3, 0.5, and 0.7) compounds were investigated by means of X-ray powder diffraction and magnetic measurements.
    本文通过X射线粉末衍射和磁性测量研究了Fe部分替代Co对SmCo6.8-xFexHf0.2(x=0.1,0.3,0.5, 0.7)化合物的晶体结构和磁性能的影响。
    1. The 673K isothermal section of La-Ni-Sn ternary systemThe phase relationships in the La-Ni-Sn ternary system at 673K have been investigated by means of x-ray powder diffraction (XRD), differential thermal analysis (DTA), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA).
    本文采用X射线粉末衍射、差热分析、金相分析、扫描电镜分析及电子探针等实验手段主要测定了La-Ni-Sn三元系673K时的相关系,发现该体系在673K时存在一个新的三元化合物,其组分的原子比为La:Ni:Sn=1:1:3。
短句来源
    The isothermal section of the phase diagram of the Er-Mn-Ni ternary system at 803K has been investigated by X-ray powder diffraction with the aid of DTA and OM techniques.
    本研究主要用X射线粉末衍射分析法,辅助差热分析法和金相分析法对Er-Mn-Ni三元系合金相图803K等温截面进行了研究。
短句来源
    Phase equilibria in the Gd-rich Gd-Ge-Si ternary system (Gd ≥40at.%) at 900 ℃ were investigated by X-ray powder diffraction and DSC.
    本文主要采用X射线粉末衍射法,差示扫描量热法(DSC)和差热分析法(DTA)研究了Gd-Ge-Si三元系富Gd(Gd≥40at.%)合金900℃等温截面的平衡相图。
短句来源
更多       
  x-射线粉末
    The 500~(.) C isothermal section of the phase diagram of Fe-Ho~Sb ternary system has been investigated mainly by X-ray powder diffraction and the Materials Data Jade 5. 0 and Powder Diffraction File (PDF release 2001) for phase analysis. DTA, optical microscopy and scanning electron microscopy were used when necessary.
    本实验主要采用X-射线粉末衍射结合粉末衍射文件(PDF) 分析法,以及差热分析法、金相分析法和扫描电镜对Fe-Ho-Sb 三元合金相图500℃等温截面进行研究。
短句来源
  粉末x-射线
    In addition, the thermal stability and basic mechanical properties of single-phase decagonal quasicrystals were researched by scanning microscopy (SEM), X-ray powder diffraction (XRD), differential thermal analysis (DTA) and microhardness technology.
    采用粉末X-射线衍射、差热分析、扫描电镜和微观硬度等手段,研究了单相十面体准晶的热稳定性及其基本力学性能。 本文的主要研究内容及获得的结论如下:
短句来源
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  x-ray powder
X-ray powder diffraction results show that the as-grown SrWO4 single crystal belongs to tetragonal system and I41/a space group.
      
The structures of the CdSe quantum dots were determined by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM).
      
The thermal decomposition of CeO2 nanocrystalline precursor prepared by chemical precipitation method was investigated using thermo-gravimetric/differential scanning calorimetry (TG/DSC) and X-ray powder diffraction (XRD).
      
The sample was characterized by X-ray powder diffraction and transmission electron microscopy (TEM).
      
The changes in the physicochemical properties of MoO3 have been investigated using techniques such as X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and ultraviolet and visible spectroscopy (UV-vis).
      
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The wettability of carbon electrodes by the molten cryolite-alumina salts was investigated in a laboratory microelectrolysis cell.Once the direct current was imposed , the wettability of carbon cathode was immediately improved, and after several minutes the molten electrolyte would gradually spread out on the carbon plate and even separate from the anode. However, the separated electrolyte would gradually coalesce into a single drop and touch the anode once again,then the electrolysis process resumed. By way...

The wettability of carbon electrodes by the molten cryolite-alumina salts was investigated in a laboratory microelectrolysis cell.Once the direct current was imposed , the wettability of carbon cathode was immediately improved, and after several minutes the molten electrolyte would gradually spread out on the carbon plate and even separate from the anode. However, the separated electrolyte would gradually coalesce into a single drop and touch the anode once again,then the electrolysis process resumed. By way of x-ray powder analyses the absorbed components in the cathode plate were determined to be Na3AlF6, NaF, A12O3 etc. Hence, most probably this is due to the change in the structure of the interfacial layer (due to the transfer of sodium ions-Na+、Na2+ and aluminium ions-A13+ 、A1 + into the cathodic layer) following the application of the cathodic potential and due to the resulting deposition of a film of metallic Al or Na. The wettability of carbon cathode was increased with the increasing of current density and of concentration of alumina in electrolyte. But when the carbon plate was anodically polarized, the wetting phenomena were different, especially in the region of high current densities. During the electrolysis a change of polarity of electrodes had been tested, it was observed that a sudden change in the wettability occurred. When a carbon anode was cathodized for a few seconds, its wettability would be greatly improved. Therefore a periodic change of polarity may be beneficial to the aluminium electroiysis.

在微型电解槽上研究了冰晶石——氧化铝熔液对炭电极的湿润性。通入直流电之后,电解质对炭阴极的湿润性变好,同时逐渐在炭板上摊散,甚至脱离阳极,但是它还会逐渐收敛成熔滴,最终重新接上阳极并恢复电解。阴极炭板所吸收的成份,经X-射线鉴定,主要是Na_2AlF_6、NaF、Al_2O_3。电解质对炭阴极的湿润性随电流强度增大和氧化铝浓度增加而改善。但是炭阳极的湿润性,在高电流密度下并非如此。在电解过程中做了变换电极极性的试验,短时间(数秒钟)内使阳极“阴极化”可改善阳极的湿润状态,因而有益于生产。

An aspect is summarized of microscopic studies on certain slagged high-alumina bricks dismantled after arc furnace roof service with various steel smelt-ing operations in the past years since 1957. The bricks were attacked mainly byMgO, CaO and iron oxides. The MgO had its sources by evaporation and infiltra-tion from either magnesite fettling material or basic furnace wall under highertemperatures. It was identified by X-ray powder pattern and by microscopic ob-servation that the periclase grains or/and...

An aspect is summarized of microscopic studies on certain slagged high-alumina bricks dismantled after arc furnace roof service with various steel smelt-ing operations in the past years since 1957. The bricks were attacked mainly byMgO, CaO and iron oxides. The MgO had its sources by evaporation and infiltra-tion from either magnesite fettling material or basic furnace wall under highertemperatures. It was identified by X-ray powder pattern and by microscopic ob-servation that the periclase grains or/and needles occur in the slagged zone ofbricks. The iron oxides, if presence, accumulated themself mostly on the surfacelayer of slagged zone, formed an assemblage of reaction products and convertedinto two systems of ferro-spinels as (MF')A and (F'M)F. However, only MAspinel was formed with less iron oxides content. Other equilibrium phases contain-ing CaO may be monticellite and anorthite. The reaction products observed seemto be calcium- hexaluminate and gehlenite in the inner layer of slagged zone,and a certain amount of glass is also present.

本文汇集1957年以来某些电炉炉顶使用后高铝砖的显微镜观察工作,砖体主要受MgO,CaO和铁氧化物侵蚀.MgO来源于补炉镁砂和镁质炉墙在高温下的冲蚀和挥发,X射线和显微镜分析证实渣蚀带一些区域内存在粒状和针状方镁石晶体.存在铁氧化物时,基本上吸附在渣蚀带表面,形成有两个尖晶石固溶体〔(MF’)A和(F’M)F〕系列的矿物共生组合,当不存在铁氧化物时,在渣蚀带生成纯MA.其它平衡相有钙镁橄榄石和钙长石.在渣蚀带内层,反应产物为六铝酸钙和钙铝黄长石.

A study was made of the electron diffraction patterns of extracted μ-phase which identified with that of X-ray powder diffraction in superalloy GH302.It is shown that the reflections with—h+k+l≠3n spots, e.g. {100}, {200},etc.in [C01] zone and {110},{101}, etc. in [111] zone (indexed as hexagonal) are forbidden for the R3m space group. These "forbidden" diffractions cannot be attributed to double diffraction with neither non-zero Laue zone nor other phases such as MgZn_2 type Laves phase. Based on diffraction...

A study was made of the electron diffraction patterns of extracted μ-phase which identified with that of X-ray powder diffraction in superalloy GH302.It is shown that the reflections with—h+k+l≠3n spots, e.g. {100}, {200},etc.in [C01] zone and {110},{101}, etc. in [111] zone (indexed as hexagonal) are forbidden for the R3m space group. These "forbidden" diffractions cannot be attributed to double diffraction with neither non-zero Laue zone nor other phases such as MgZn_2 type Laves phase. Based on diffraction extinction law, it seems to be a primitive hexagonal lattice (P6). Its lattice constant is consistent with that of μ-phase (R3m) described as hexagonal. It may be a kind of local-ordering structure of μ-phase.

在GH302合金的萃取μ相电子衍射花样中,(经X射线粉末衍射确定为μ相)出现了μ相空间群为(?)m的-h+k+l(?)3n禁止衍射。例如:[001]带轴中的{100},{200}等衍射斑点,以及{111}带轴中的{(?)},{(?)}等衍射斑点,这些禁止衍射斑点,不属于二次衍射,高级劳厄带或者其它物相(例如MgZn_2型Laves相)的衍射斑点。因此,根据衍射消光规律可以确定该物相为简单六方点阵,其晶胞参数与μ相((?)m)用六方点阵所描述的情况相符合。它可能是一种μ相局部有序结构。

 
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