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hydrogen
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    Effect of Alloying, Heat Treatment and Magnetization Treatment on Microstructure and Electrochemical Properties of AB_5 Type Hydrogen Storage Electrode Alloy
    合金化、热处理及磁化处理对AB_5型贮电极合金微结构与电化学性能的影响
短句来源
    A Study on the Improvement of Cycling Stability of Ball-milled Mg-based Hydrogen Storage Electrode Alloys by Means of Multi-component Alloying
    以多元合金化改进球磨Mg基贮电极合金循环稳定性的研究
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    Study on Electrochemical Behavior of AB_5-type Hydrogen Storage Alloys for Ni-MH Battery
    MH-Ni电池用AB_5型贮合金电化学行为的研究
短句来源
    Study of Hydrogen Storage Alloys for High-power MH/Ni Battery
    高功率MH/Ni电池用负极贮合金的研究
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    Research on Nd-Free LPC-Type Hydrogen Storage Alloys for Hydride Electrodes
    无钕稀土LPC系贮合金电极材料的开发研究
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  “hydrogen”译为未确定词的双语例句
    Study on Corrosion Properties of Domestic X70 Pipeline Steels and Welding Joints in Medium with Hydrogen Sulfide
    国产X70管线钢及其焊接接头的硫化氢腐蚀性能研究
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    Evaluating Stress Corrosion Cracking KISCC and da/dt in Hydrogen Sulfide Solutions with Instrumented Bolt WOL Specimens
    用测力螺栓式WOL法测定硫化氢应力腐蚀的K_(ISCC)及da/dt
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    Inhibiting Hydrogen Embrittlement of Metals by Ion Impregnation
    离子注入抑制金属氢脆
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    The Manufacture and Application for Rapid Sampling Apparatus Of Hydrogen and Oxygen
    氢氧快速取样器的研制与应用
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    SURVEY ON HYDROGEN REMOVAL TECHNIQUE FOR HEAVY RAIL STEEL
    重轨钢除氢工艺探讨
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  hydrogen
In the CoMSIA model, steric, electrostatic, hydrophobic and hydrogen bond donating factors were correlated to the activity and later the favorable and unfavorable regions of interaction were obtained.
      
tripos standard, hydrogen bonding, parabolic indicator in the case of CoMFA and steric, electrostatic, donor, acceptor, hydrophobic, donor and acceptor, steric and electrostatic in the case of CoMSIA.
      
Flavonoid antioxidants act as scavengers of free radicals by rapid donation of a hydrogen atom.
      
In addition, electrostatic, hydrogen-bonding, and dipole-dipole interactions are responsible for the above separations, which improve the selectivity of DNB for solutes.
      
Both metalation reaction with n-butyllithium and hydrochlorination reaction with dry hydrogen chloride selectively and quantitatively occurred at the pendant reactive sites, generating polymeric benzyllithium and 1-chloroethylbenzene species.
      
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Internal friction peaks associated with the presence of hydrogen in eight types of high chromium-nickel alloy steel were observed in measurements with a torsion pendulum. The optimum temperature for maximum internal friction lies between 610-640℃ for a frequency of vibration of about 1.5 cycles per second. Systematic investigations were made with specimens containing 18% of Cr and 12% of Ni. The elementary process for this internal friction peak was found to be a relaxation process, associated with an...

Internal friction peaks associated with the presence of hydrogen in eight types of high chromium-nickel alloy steel were observed in measurements with a torsion pendulum. The optimum temperature for maximum internal friction lies between 610-640℃ for a frequency of vibration of about 1.5 cycles per second. Systematic investigations were made with specimens containing 18% of Cr and 12% of Ni. The elementary process for this internal friction peak was found to be a relaxation process, associated with an activation energy of about 46,000-50,000 calories per mole. Judging from the value of this activation energy, as well as from the behavior of the internal friction peak when the measurements were taken while the temperature was raised, lowered and kept constant, the conclusion was reached that the new internal friction peak is associated with the stress-induced micro-diffusion of hydrogen molecules in high alloy steels.

用扭摆作内耗测量,发现八种高铬镍合金钢中含氢可以引起内耗峰。当振动频率约为每秒1.5周时,内耗峰的巅值温度在610—640℃附近。用其中一种高铬镍合金钢试样(18Cr 12Ni)进行了系统的实验,指出这个内耗峰的基元过程是一种弛豫过程,所包含的激活能约为46,000—50,000卡/克分子。根据激活能的数值以及内耗峰在升温、降温和保温时的变化情况,可以认为这个新内耗峰是由於氢分子在钢中微扩散所引起来的。 内耗测量的结果也指出了在18Cr 12Ni钢中在特定的升温、降温速度下氢分子舆氢原子的转变温度范围,所得的结果舆资料上的相合。

Metallographic observations were made on mixed copper-iron whiskers grown by reducing chlorides of these metals together in hydrogen. The layer structure of a section of the lower part of a whisker was found to be different from that of its upper part. In addition to growing in layers, mixed whiskers also showed the peculiarity of growing in segments. When the growth in layers and in segments were considered in a unified view, a mechanism of growth was suggested in which an alternation of one-dimensional...

Metallographic observations were made on mixed copper-iron whiskers grown by reducing chlorides of these metals together in hydrogen. The layer structure of a section of the lower part of a whisker was found to be different from that of its upper part. In addition to growing in layers, mixed whiskers also showed the peculiarity of growing in segments. When the growth in layers and in segments were considered in a unified view, a mechanism of growth was suggested in which an alternation of one-dimensional and two-dimentional growth was assumed to proceed continuously in the course of growth. Mixed whiskers of more than two metals were also grown; it was found that the growth in layers was much more obvious. Hardness measurements on cross-sections of the whiskers showed that the hardness is different at different places. The behavior of such whiskers was shown to be analogous to that of concrete reinfored with steel, in which the axle whisker plays the role of steel and the surrounding dispersive mixture plays the role of concrete.

把氯化亚铜和氯化亚铁一起在氢气中进行还原,得到了混合铜铁须。对于这种金属须进行金相观测时发现,金属须下部的一个截面里所呈现的层状桔构与金属须上部的一个截面里的不同。混合金属须除了表现层状生长以外,还表现了特殊形式分段生长。用综合的观点来考虑层状生长和分段生长,提出了一个混合金属须生长机构,在其中假定了在生长过程中不断发生一维和二维生长的相互更迭。也生出了二种以上金属的混合金属须,在这种金属须中的层状生长更为明显。在金属须的截面上进行了微硬度测量,指出在不同地点的硬度并不相同。混合金属须的行为有点象是钢筋混凝土,它中部的心轴金属须有如钢筋,而四围的瀰散混合体有如混凝土。

Internal friction as a function of strain amplitude in zone-refined molybdenum single crystals and commercially pure polycrystalline molybdenum was measured with the three-component piezo-electric resonator method developed by Marx. A Granato-Lucke (GL) type of strain-amplitude-dependent decrement was obtained in molybdenum single crystal annealed in hydrogen at 2000℃. With some prior deformation in molybdenum single crystal, a plateau (or maximum) appears on the decrement-amplitude curve, which is similar...

Internal friction as a function of strain amplitude in zone-refined molybdenum single crystals and commercially pure polycrystalline molybdenum was measured with the three-component piezo-electric resonator method developed by Marx. A Granato-Lucke (GL) type of strain-amplitude-dependent decrement was obtained in molybdenum single crystal annealed in hydrogen at 2000℃. With some prior deformation in molybdenum single crystal, a plateau (or maximum) appears on the decrement-amplitude curve, which is similar to the results of pure aluminium at low temperature and low strain amplitude. From the observations of dislocation etch-pits, it may be concluded that the presence of this plateau is related to the fresh dislocations (or weakly pinned dislocations) produced by cold work. The increase of decrement at the plateau (or maximum) is proportional to the density of fresh dislocations. The investigations of the effects of temperature and aging (200-300℃) on the amplitude-dependent decrement indicated that the decrement decreases with the decrease of temperature and with the increase of aging time, and the position of the maximum shifts to the higher amplitude as the temperature decreases. All the results are discussed in terms of an extension of the GL theory.

用Marx方法(频率为86kc/s及102kc/s)测量了区熔提纯钼单晶及工业纯钼多晶的内耗振幅依赖关系。钼单晶在2000℃氢气炉中退火后可测得Granato-Lcke型的内耗-振幅曲线。微量冷加工后内耗增大,并使内耗振幅曲线上出现转折平台(或称极大值),与铝在低温低振幅下测得的结果相似。根据位错蚀坑的观察结果,初步认为此转折平台的出现是与冷加工在晶体中产生的未被钉扎的新位错有关,并求得转折平台处内耗的增值与新位错密度成正比的关系。此外还做了温度和时效(200—300℃)对内耗振幅曲线的影响,随着温度的降低和时效时间的增长,内耗明显下降。以上的结果我们用推广的GL理论进行了讨论。 测量了冷加工对工业纯钼多晶的内耗振幅曲线的影响,基本符合GL理论。

 
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