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diffusion of
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  扩散
     Rheological Behavior and Atomic Diffusion of Pd-based and Zr-based Bulk Metallic Glasses
     Pd基Zr基大块金属玻璃的流变及原子扩散行为研究
短句来源
     Models on the Market Diffusion of Innovation Products and Its Applications
     创新产品市场扩散模型及其应用
短句来源
     INTERNAL FRICTION PEAK ASSOCIATED WITH THE STRESSINDUCED DIFFUSION OF CARBON IN LOW-CARBON ALLOY MARTENSITE
     碳在低碳合金马氏体中微扩散所引起的内耗峰
短句来源
     INTERNAL FRICTION PEAK ASSOCIATED WITH THE STRESSINDUCED DIFFUSION OF HYDROGEN MOLECULES IN HIGH CHROMIUM-NICKEL ALLOY STEELS
     氢分子在几种高铬镍合金钢中微扩散所引起的内耗峰
短句来源
     A STUDY ON THE DIFFUSION OF CARBON IN γ-IRON BY METHOD OF INTERNAL FRICTION
     用内耗方法研究碳在γ-铁中的扩散
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  中扩散
     Diffusion of Benzene in ZSM-5 Molecular Sieve
     苯在ZSM-5分子筛中扩散的研究
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     During mechanical alloying of the powder,the supersaturated solid solution of Al,Ti,B in Fe,Fe(Al,Ti,B),is formed by the diffusion of the Al,Ti,B atoms into the Fe lattice.
     研究表明,Fe-Al-Ti-B四元粉体的机械合金化通过Al、Ti、B原子向Fe晶格中扩散形成Fe(Al,Ti,B)过饱和固溶体。
短句来源
     Study on the Diffusion of Some Au (Ⅲ) and Au (Ⅰ) Complexes in Solution
     某些Au(Ⅲ)、Au(Ⅰ)配离子在溶液中扩散的研究
短句来源
     Studies were made of the effect of tempering varied at temperature rangedfrom 25 to 750℃ for 0.5 to 100 h on the changes of measured hardness, precipitated phaseand its alloying elements content as well as the activation energy of tempering for quenchedsteel 20Cr11MoVNbNB. Tempering of the steel below 400℃ may be controlled by diffusionof C atoms in α-Fe, and over 400℃, by diffusion of Cr, also Mo or V, in α-Fe
     研究了淬火20CrllMoVNbNB钢在室温-750℃不同温度回火0.5—100h后的硬度相析出变化,析出相中合金元素含量变化以及回火激活能等,证明在低于400℃时,该钢的回火过程受C原子在α-Fe中扩散所控制; 在高于400℃时,回火过程受合金元素Cr(以及Mo,V)在α-Fe中扩散所控制
短句来源
     The observation on diffusion of ~(241) Am(NO_3)_3 in localtissue around a ~(241)Am-contaminated wound in rats was presented in thispaper.
     本文介绍~(241)Am(NO_3)_3污染大鼠伤口后在局部组织中扩散的实验观测结果。
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  扩散规律
     The influence of heat and force factors and their interaction, such as forging temperature, heat treatment process, deformation amount, on the element diffusion of Al, Nb, V at weld zone has been investigated for the Ti-24Al-15Nb-1.5Mo/TC4 dual alloy billet after welded in vacuum and rolled or treated.
     研究了2种状态的金属问化合物基合金Ti-24Al-15Nb-1.5Mo与TC4钛合金毛坯经真空电子束焊接后,锻造温度、热处理制度、变形量等热力因素以及它们的交互作用对合金元素Al,Nb,V在焊接界面上扩散规律的影响。
短句来源
     It has been investigated that the influence of forging temperature, heat treatment regime, deformation, interaction of heat and force on diffusion of elements Al, Nb, V at weld zone for Ti-24Al-15Nb-1.5Mo /TC4 dual alloy welded in vacuum with billet rolled or treated.
     本文研究了不同状态的金属间化合物Ti-24Al-15Nb-1.5M_0与两相钛合金TC4毛坯经真空电子束焊接后,锻造温度、热处理制度、变形量以及热力交互作用对合金元素Al、Nb、V在焊接界面上扩散规律的影响。
短句来源
     Diffusion of Na +, K +, Mg 2+ , SO 4 2- and Cl -ions into concrete and reinforced concrete structures exposed to salt lake was investigated by chemical analyzing. Interaction between corrosive ions and concrete was studied by means of XRD, DTA TG and SEM EDAX method.
     采用化学分析方法探索了盐湖环境的Na+,K+,Mg2 +,SO42 - 和Cl- 离子在混凝土和钢筋混凝土结构中的扩散规律 ,并用XRD ,DTA TG和SEM EDAX方法研究了侵蚀性离子与混凝土之间的相互作用机理 .
短句来源
     Diffusion of Carbon Monoxide Gas in Human Lung and a New Method to Calculate D~(LCO)
     一氧化碳气体在肺内的扩散规律及计算D_(LCO)的新方法
短句来源
     Simulation of Recurrent Congestion Diffusion of Urban Arterial Street
     城市主干路常发性拥挤扩散规律的模拟研究
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  “diffusion of”译为未确定词的双语例句
     NUMERICAL COMPUTATION OF THE DIFFUSION OF THE CONTAMINANTS AND THE FLOW FIELD OF SKEW DISCHARGES INTO A CHANNEL
     NUMERICAL COMPUTATION OF THE DIFFUSION OF THE CONTAMINANTS AND THE FLOW FIELD OF SKEW DISCHARGES INTO A CHANNEL
短句来源
     A BFG model for calculation of tidal current and diffusion of pollutants in nearshore areas
     A BFG model for calculation of tidal current and diffusion of pollutants in nearshore areas
短句来源
     Conductivity of K_7[CrCa(OH_2)W_(11)O_(39)] treated by thermal diffusion of Gd permeation
     钆对K_7[CrCa(OH_2)W_(11)O_(39)]配合物的热扩渗及其导电性研究
短句来源
     Conductivity of K_(11)[Sm(AlW_(11)O_(39)H_2)_2]·21H_2O Treated by Chemistry-Heated Diffusion of Mixed Ce and La Permeation
     稀土对K_(11)[Sm(AlW_(11)O_(39)H_2)_2]·21H_2O的气相热扩渗及其导电性研究
短句来源
     DIFFUSION OF O_2,N_2,CH_4 ON CARBON MOLECULAR SIEVE
     O_2,N_2,CH_4在碳分子筛上的扩散系数计算
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  diffusion of
One DR peak associated with the short-distance diffusion of oxygen vacancies was observed in both temperature and frequency spectra.
      
The method of NMR spin echo with the magnetic field pulse gradient was used for studying self-diffusion of water molecules in the radial root direction.
      
Diffusion of an Organic Cation into Root Cell Walls
      
Nonspecific pore-forming proteins (porins) are the major proteins of the outer membrane of Gram-negative bacteria responsible for diffusion of low-molecular-weight compounds.
      
Furthermore, these inhibitors not only reduce the local tissue damage but also retard the easy diffusion of systemic toxins and hence increase survival time.
      
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Equations determining the velocity and density distributions within the mixing region of two incompressible gases with different densities are set up, their temperatures being assumed to be the same. For incompressible mixing the total number of gas molecules per unit volume is constant, although the density of the gaseous mixture varies from point to point due to diffusion of matter. As an illustration we consider the plane jet and steady motion. The boundary layer method of approximation can still be...

Equations determining the velocity and density distributions within the mixing region of two incompressible gases with different densities are set up, their temperatures being assumed to be the same. For incompressible mixing the total number of gas molecules per unit volume is constant, although the density of the gaseous mixture varies from point to point due to diffusion of matter. As an illustration we consider the plane jet and steady motion. The boundary layer method of approximation can still be applied. The boundary of the jet is shown to be the same as that for one fluid. The solution of the problem then depends upon the numerical value of the coefticient of viscosity of the mixture which is a function of the number of molecules of each constituent gas in the unit volume. The present method of investigation is applicable to the cylindrical and half jets and also to the case where the two gases are at different temperatures.

本文求出规定二不能压缩气体的分片合流运动时,速度与质量密度分布的微分方程式。假定两种气体的密度不同但温度则相等。不能压缩的定义是每单位体积中的两种气体分子数的和不变。本文只讨论一平面守恒注中所需要的微分方程式。粘滞流体运动中之边界近似法仍可应用。同样方法亦可用到守恒圆柱体注,半注及气体中温度不同诸问题。

Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain...

Creep under very small torsional stress has been investigated for 99.95% polycrystalline iron in the temperature range of 350°-525℃. The general features of the creep curves obtained are essentially the same as those previously reported for 99.991% aluminum. The creep is shown to be consisted of two parts, one occurring at lower temperatures or shorter times and the other at higher temperatures or longer times. The first part of the creep is limited in extent and is associated with the viscous behavior of grain boundaries. The activation energy for this grain-boundary creep is 78,000 ± 4,000 calories per mole according to the present creep and stress relaxation measurements. This value is close to the activation energy for self-diffusion of iron, a correlation which indicates that, in so far as to the mechanism of atomic migration is concerned, grain boundaries may not be very different from the interior of the grains.

用99.95%的多晶纯铁作了从350°-525℃的扭转微蠕变及应力弛豫试验,所得结果的概貌与以前用多晶纯铝所得的基本上相同。从蠕变曲线上可以看出这蠕变是由两部分组成的:第一部分是在较低温度或较短时间内发生的,第二部分是在较高温度或较长时间内发生的。第一部分的蠕变是有限的,是由于晶粒间界的粘滞性滑移所引起。根据微蠕变及应力弛豫测量的结果,这一部分蠕变所包含的激活能是78,000±4,000卡/克分子。这个激活能(晶粒间界滑移激活能)的数值与纯铁自扩散的激活能很相近,表示晶粒间界与晶粒内部对于原子迁移的基本过程而言并没有显著的差异。 加碳于纯铁中对于这两部分的蠕变都有显著的影响。最值得注意的结果是含碳量少到0.0004%时已经使晶粒间界的粘滞性滑移受到显著的阻碍。这些发现在控制金属高温蠕变的问题上指出一个一般性的原则,对于以前所提出来的晶粒间界空穴模型也提供了一些新的实验证据。 根据加碳的实验结果,对于第二部分高温蠕变的机构也提出了一个初步的看法,这蠕变所包括的基本过程可能是晶粒内部的空穴中的原子重新排列。

It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced...

It is well-known that blue brittleness and temper brittleness of steel are related to diffusion and precipitation in steel. An attempt was made in the present research to investigate this problem by means of internal friction measurements. Experiments show that the diffusion of carbon in α-iron is not affected by carbon concentration, alloying elements and the stage of precipitation in iron. The diffusion of nitrogen in α-iron is, however, hindered by the addition of alloying elements, and is enhanced during the initial stage of precipitation.

一般认为钢的变脆例如蓝脆和回火脆都与钢中的扩散和沉淀有关系。本文尝试用内耗测量的方法研究碳与氮在α-铁及碳素钢中的扩散、脱溶和沉淀,从而进一步地了解钢的变脆的机构。实验的结果指出,碳在α-铁中的扩散不受自身浓度、合金元素和沉淀历史的影响。氮的情形与碳显著不同,合金元素使氮的扩散变慢,在沉淀初期使氮的扩散加速。 较有系统地研究了碳、氮在加工后的α-铁中脱溶时所引起的内耗峰(当振动频率约为每秒1周时出现在250℃左右),发现了高温淬火在含碳或氮较多的试样中所产生的内应力也可以引起这个内耗峰。实验指出:①这个脱溶内耗峰的出现条件与钢的蓝脆的出现条件相同,都是一种应变时效或淬火时效的现象;②与这个内耗峰有关的碳、氮是处于原子的状态。这些联系使我们认为钢的蓝脆是一种应变脱溶或淬火脱溶的过程,是由于原子状态的碳或氮聚集于钢中的内应力区域或晶体缺陷(例如原子脱节)中所引起来的。关于这方面的深入研究正在继续进行中。 根据本实验及以前关于钢铁中碳氮的扩散、脱溶和沉淀所得的结果,对于钢的回火脆的机构也提出了一种初步的看法。回火脆是一种回火沉淀的过程,引起回火脆的沉淀似乎是氮化物而不是碳化物。

 
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