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effect dueto the inhomogeneous distribution of nanometer scale sp2 clusters and the reductionof the surface emission barrier due to the hydrogen termination. Key words:field emission; amorphous carbon...THE IMPROVEMENT OF ELECTRON FIELD EMISSION FROM AMORPHOUS CARBON FILMS DUE TO HYDROGEN PLASMA CHEMICAL ANNEALING EFFECT J.B.Xu1,J.Xu1,W.Li1,K.J.Chen1,L.Wang1,X.H.Huang1 (1.National Laboratory......
573 K,623 K和673 K,再次测量渗透通过样品的渗氢流量,最后将测量的渗氢流量带入式(1)并经过线性拟合得出各实验条件下的氢渗透系数Ф. 图1 氢渗透实验装置示意图 (V1~V6: 世伟洛克阀门) Fig. 1 Schematic illustration of hydrogen permeation measuring apparatus used.../(m·s·Pa1/2),渗氢流量为3.52 mL/min,且能持续渗氢高达40 h. 图4 渗氢区域内(III')5种合金(18#, 17#, 25#, 24#和33#)氢渗透流量J随着时间t变化曲线(插图为渗氢后合金膜的表面形貌) Fig. 4 Curve of hydrogen permeation flux with change of time......
Cr5钢锭去氢退火过程的数学模拟游佳迪1,杨弋涛1,张洪奎2,邵光杰1(1.上海市上海大学材料科学与工程学院2.宝钢钢铁股份有限公司 特殊钢分公司)摘 要:对氢在Cr5钢锭退火过程中的扩散建立了数学模型,以matlab软件对该模型进行求解,模型估计与实测值较相吻.该模型可用于指导和优化去氢退火工艺,对减少白点报废率具有一定的意义.关键词:Cr5钢； 去氢退火； 数值模拟； 电化学渗氢......
Activation energy is regarded as an important parameter for evaluating the gas-solid reaction kinetics. As to gaseous hydrogen desorption, it is usually considered to be associated with total energy barrier...J. Cent. South Univ. (2017) 24: 773-781 DOI: 10.1007/s11771-017-3479-8 Gaseous hydrogen storage thermodynamics and kinetics of RE–Mg–Ni-based alloys prepared by mechanical milling ZHANG Yang-huan(张羊......
J. Cent. South Univ. (2021) 28: 699-711 DOI: https://doi.org/10.1007/s11771-021-4639-4 Relationship between hydrogen concentration and mechanical properties of 5Ni-16Cr-Mo steel SUN Yong-wei(孙永伟)1... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: The qualitative relationship between hydrogen concentration and notch tensile strength has been investigated......
. The hydrogen diffusion coefficient in weld metal, the heat affected zone (HAZ), and the base metal of the 16MnR steel weldment were measured using the electrochemical permeation technique...3-D FINITE ELEMENT ANALYSIS OF THE EFFECT OF WELDING RESIDUAL STRESS ON HYDROGEN DIFFUSION IN HYDROGEN CONTAINED ENVIRONMENT H. Chen1,S.T. Tu1,W.C. Jiang1,J.Q. Tang1,J.M. Gong1 (1.College......
was analyzed by laser particle size measurement. The results indicate that the particle size is in nano-scale and the diameter of particles deceases with increasing dilution times. Gel permeation... of the self-assembled coating. Key words: self-assembled coating; particle size; gel permeation chromatography; silane; corrosion resistance 1 Introduction Due to the unique chemical......
Hydrogen storage behaviors and microstructure of MF3 (M=Ti, Fe)-doped magnesium hydride PENG Shu-ke(彭书科), XIAO Xue-zhang(肖学章), XU Rui-juan(许瑞娟), LI Luo(李 骆), WU Fan(吴 凡), LI Shou-quan...: MgH2+10%MF3 (M=Ti, Fe) (mass fraction) composites were prepared by ball-milling in hydrogen atmosphere, and their hydrogen storage behaviors and microstructure were investigated systematically......
, construction and performance of the amperometric and potentiometric sensors for measuring the permeation rate of hydrogen through the wall of metal equipment were investigated in order to develop a new type of hydrogen sensor with high accuracy. The transient curves of hydrogen permeation under a given charging condition were employed to evaluate the performance of two types of hydrogen sensors......
the bonding force reduction [37], local plastic deformation [38], surface energy reduction [39], and hydrogen pressure theories [40]. A commonality among all of the proposed mechanisms is the permeation... J. Cent. South Univ. (2020) 27: 2408-2423 DOI: https://doi.org/10.1007/s11771-020-4458-z Control of repair effect and hydrogen embrittlement risk by parameters optimization for BIEM ZHANG Jun(张军)1......
