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precipitation
相关语句
  沉淀
    THE PRECIPITATION OF γ′ PHASE IN ELINVAR ALLOY BY MOSSBAUER EFFECT
    埃林瓦合金中γ′相沉淀的穆斯堡尔效应研究
短句来源
    Precipitation Kinetics in Al-Li-Zn-Zr Alloys
    Al-Li-Zn-Zr合金沉淀动力学研究
短句来源
    PRECIPITATION IN BINARY Al-Li ALLOYS
    二元Al-Li合金的沉淀反应
短句来源
    Precipitation Behavior in Monel K-500 Alloy
    MONEL K-500合金中沉淀相的沉淀行为
短句来源
    Study on Characteristics of Al Alloy Composites Strengthened by Particle and Precipitation
    颗粒增强与沉淀强化铝合金叠层复合材料特性研究
短句来源
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  析出
    The Study of Precipitation Phase of Semi-hard Fe-Ni-AI-Ti Magnetic Alloy in the Tempering Procese
    Fe-Ni-Al-Ti半硬磁合金中析出相的研究
短句来源
    PHASE BOUNDARY OF α_2 PRECIPITATION IN Ti-Al-La TERNARY SYSTEM
    Ti-Al-La三元系中α_2相析出相界
短句来源
    DYNAMICS OF PRECIPITATION AND TRANSFORMATION OF CARBIDES IN A Ni-BASE SUPERALLOY
    一种镍基高温合金的碳化物析出与转化动力学
短句来源
    IN SITU ELECTRON MICROSCOPY STUDY ON PRECIPITATION OF ZIRCONIUM HYDRIDES INDUCED BY STRAIN AND STRESS IN ZIRCALOY-2
    Zr-2合金中应力及应变诱发氢化锆析出过程的电子显微镜原位研究
短句来源
    The Precipitation of the Ni—rich Precipitates and its Effet on the Mechanical Behaviors in TiNi Shape Memory Alloys
    TiNi形状记忆合金中富镍相的析出及其对机械行为的影响
短句来源
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  沉淀法
    Using analytically pure Fe2(SO4)3(AP)and NH3·H2O(AP)as raw materials,a series of α-Fe2O3-Mica thin films were prepared on mica substrates by homogenous precipitation method under different Fe3+ concentrations,reaction temperatures,pH values and heat treatment temperatures.
    采用分析纯Fe2(SO4)3和NH3.H2O作为主要原料,控制不同的Fe3+浓度、水解温度、溶液pH值及热处理温度,利用液相均匀沉淀法在白云母形成基片上制备了系列α-Fe2O3-Mica纳米薄膜.
短句来源
    Nanocrystalline SnO_2 Synthesised by Means of Hydrothermal Precipitation
    水热沉淀法合成SnO_2纳米晶
短句来源
    Synthesis of nanomaterials by high gravity reactive precipitation method and applications
    超重力反应沉淀法合成纳米材料及其应用
短句来源
    Chemical Precipitation Method for Preparation of Nano TiO_2 and Its Application
    化学沉淀法合成纳米TiO_2粉体及其应用
短句来源
    Preparation of nanosized BaTiO_3 powders by high gravity reactive precipitation (HGRP)
    超重力反应沉淀法(HGRP)制备纳米BaTiO_3的研究
短句来源
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  “precipitation”译为未确定词的双语例句
    A NEW METHOD TO PREDICT THE PRECIPITATION OF σ—PHASE IN NICKEL-BASE SUPERALLOYS——THERMODYNAMICS EQUILIBRIUM CALCULATION
    Ni基高温合金中预测σ相的新方法——热力学平衡计算法
短句来源
    EFFECT OF ALLOYING ELEMENTS ON THE PRECIPITATION AND TENSILE PROPERTIES OF Al-Li ALLOYS
    合金元素对 Al-Li 合金时效行为和力学性能的影响
短句来源
    INTERNAL FRICTIONS OF MARTENSITIC TRANSFORMATION AND PRECIPITATION IN Mn-Cu ALLOY
    Mn-Cu合金马氏体相变与沉淀的内耗
短句来源
    EFFECT OF REINFORCEMENT VOLUME FRACTION ON PRECIPITATION IN MATRIX OF SiCp/ AI COMPOSITE
    增强相体积分数对SiCp/Al复合材料基体沉淀的影响
短句来源
    Synthesis of Nano-sized MgO by Precipitation
    纳米级MgO粉体的合成
短句来源
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  precipitation
The water-soluble glucan was obtained from Pleurotus florida fruit bodies by hot water extraction, ethanol precipitation, DEAE cellulose dialysis and Sephadex G-75 gel filtration.
      
Preparation and characterization of nanocrystalline ZnO by direct precipitation method
      
Nanocrystalline ZnO was prepared with ZnCl2·2H2O and (NH4)2CO3 as raw materials by direct precipitation method.
      
The ion-exchanger LiAlTiO4 of spinel type was prepared by the common precipitation/hydrothermal crystallization method, and was acid-modified.
      
The precursors of Fe2O3-SiO2 mixed oxides prepared through co-precipitation method were modified by microwave hydrothermal treatment for the first time.
      
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A detailed thermomagnetic analysis was carried out on a number of alloys along a tie-line in the two-phase (β+β') region of the Fe-Ni-Al ternary system. The supersaturated solid solution, obtained by quenching an alloy close to the composition Fe2NiAl, broke up very fast at relatively high temperatures ( ~ 850℃), precipitation being completed in a little more than a minute. The β' phase formed at 850℃ still contained about 35 at. % iron, with a Curie point near 400℃. When this alloy, after going through...

A detailed thermomagnetic analysis was carried out on a number of alloys along a tie-line in the two-phase (β+β') region of the Fe-Ni-Al ternary system. The supersaturated solid solution, obtained by quenching an alloy close to the composition Fe2NiAl, broke up very fast at relatively high temperatures ( ~ 850℃), precipitation being completed in a little more than a minute. The β' phase formed at 850℃ still contained about 35 at. % iron, with a Curie point near 400℃. When this alloy, after going through such a short tempering at 850℃ followed by quenching, was heated up to 600-700℃ again, the β' phase formed during the first tempering continued to decompose rapidly, losing enough iron to become nonmagnetic in not much more than ten minutes. This caused the room-temperature coercive force of the alloy to rise to about 500 Oe. Such a phenomenon is in agreement with БгЛнвиЦ'S. г. suggestion of "post-precipitation". The magnetic measurements showed, moreover, that the post-precipitatioa of the β' phase was "reversible", that is, when the alloy was brought up to 850℃ again after quenching from the second tempering at 600-700℃, theβ' phase could recover its equilibrium composition for 850℃ in a few minutes. Decomposition of the supersaturated solid solution FejNiAl at relatively low temperatures (below 700℃) was quite slow, and, furthermore, there was considerable evidence that the process was "non-uniform". On the basis of the above findings, the fact that high coercive force in the alloy FeaNiAl cannot be obtained by quenching from above the solution temperature plus tempering at relatively low temperatures (600-700℃) is interpreted in the light of the single-domain particle theory.

用热磁分析方法较仔细地观测了Fe-Ni-Al三元系合金沿β+β′两相区内某一结线上的几个不同成分的合金样品。淬火所得的成分接近Fe_2NiAl的过饱和固溶体在较高温度(~850℃)分解甚快,在一分钟内脱溶基本上完成。在850℃分出的β′相还含铁约35at.%,其居里点在400℃附近。在850℃经短时间回火继以水淬的合金,在600—700℃再经适当的回火,则首次回火所生成的β′相继续迅速分解,在不超过十分钟内损失大量的铁而变成非铁磁性的;其在室温的H_c可增到500奥斯特。这和Б.Г.Лившнц“所提出的继续脱溶”的假设相符。磁性观测的结果证明:β′相的继续脱溶是“可逆的”,就是说,把曾在600—700℃回火的合金重热至850℃时β′相能在几分钟内恢复850℃的平衡成分。Fe_2NiAl过饱和固溶体在较低温度(70O℃以下)分解极慢,并且其过程是明显地“不均匀”的。因此,这种合金不能通过高温淬火继以较低温度(600—700℃)回火的处理来获得高H_c的事实可以用单畴粒子的理论加以解释。

Some investigations on the titanium-containing (~5% Ti) and higher cobolt content (~34% Co) permanent magnet alloy[1] recently developed upon the basis of the composition of Alnico 5 are reported in this paper. It is shown that superior permanent magnetic properties may be obtained by means of isothermal magnetic treatment as compared with those obtained by controlled cooling rate treatment, confirming the experience of Koch et al. It has been found that the coercive force is very sensitive to the temperature...

Some investigations on the titanium-containing (~5% Ti) and higher cobolt content (~34% Co) permanent magnet alloy[1] recently developed upon the basis of the composition of Alnico 5 are reported in this paper. It is shown that superior permanent magnetic properties may be obtained by means of isothermal magnetic treatment as compared with those obtained by controlled cooling rate treatment, confirming the experience of Koch et al. It has been found that the coercive force is very sensitive to the temperature of isothermal magnetic treatment. The structural states of isothermally-magnetically treated specimens were investigated by means of electron microscopy and other means. The results indicate that different conditions of prior isothermal magnetic treatment lead to states of different dispersion and morphology of the a'-phase, and hence to different permanent magnetic properties. The experimentally determined C-curve of γ1-phase shows that the precipitation of the γ1-phase is very rapid. Careful metallographic examination has revealed that the so called ar -phase is actually heterogeneous. The experimentally established quantitative relationship between the permanent magnet properties of the alloy and the content of the "ar-phase" clearly demonstrates the detrimental effect of the latter on the former.

本文报导了近几年来在吕臬古5成份基础上发展起来的含钛(~5%)高钴(~34%)吕臬古永磁合金所作的若干研究。试验证实,通过恒温热磁处理,可以获得远较控速处理为优异的永磁性,肯定了Koch等的经验;发现矫顽力对恒温热磁处理温度极为敏感。对恒温热磁处理的样品的结构状态,进行了电子显微等的研究,表明由于事先的恒温处理条件不同,造成了α′相的不同分散度、不同形态和不同的永磁性。求得的r_1相的C曲线表明r_1相脱溶很快。仔细的金相研究发现,所谓的α_r相实为多相。基于试验建立的永磁性与“α_r相”含量的定量关系,清楚地揭示了“α_r相”对永磁性的危害作用。

Experimental studies have been carried out on the effects of raw material preparation and hot-pressed conditions on the density, microstructure and magnetic properties of hot-pressed Mn-Zn ferrites and Ni-Zn ferrites which are used for magnetic head application. Hot-pressed ferrites have been prepared by two different technologies: the co-precipitation method and the ball-milling method. It was observed that the co-precipitation method is better than the ball-milling method for preparation of hot-pressed...

Experimental studies have been carried out on the effects of raw material preparation and hot-pressed conditions on the density, microstructure and magnetic properties of hot-pressed Mn-Zn ferrites and Ni-Zn ferrites which are used for magnetic head application. Hot-pressed ferrites have been prepared by two different technologies: the co-precipitation method and the ball-milling method. It was observed that the co-precipitation method is better than the ball-milling method for preparation of hot-pressed ferrites. The microstructure can be controlled by varying the hot-pressed conditions. Dense ferrites of different grain sizes (average grain size 10 μm-300 μm) can be made. For example, dense Mn-Zn ferrites with μ0 = 7420 and Bm = 4950 Gs and dense Ni-Zn ferrites with different μ0(μ0 = 100-2500) can be made by hot-pressing.

本文从实验上研究了起始粉料的制备方法和热压条件对磁头用的Mn-Zn及Ni-Zn热压铁氧体的密度、显微结构和磁性的影响。实验结果表明,化学共沉淀法制备的铁氧体粉料比氧化物法及硫酸盐法制备的要好。适当选择热压条件,可以获得晶粒分布均匀、晶粒大小不同(10μm—300μm)的高密度铁氧体;可以获得μ_0=7420以及B_m=4950Gs的高密度Mn-Zn铁氧体和μ_0等于100—2500的高密度Ni-Zn铁氧体。

 
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