Structural Heredity of the Aluminum Alloy Obtained by the Additive Method and Modified Under Severe Thermomechanical Action on Its Final Structure and Properties

Russian Physics Journal - Samples of AA5356 aluminum alloy manufactured by the electron-beam additive method and modified using the friction stir processing method have been investigated....     

Features of the Radiation-Stimulated Hydrogenation of an Aluminum Surface

By the methods of reflection-absorption IR (infrared) spectroscopy, electrical measurement and AFM microscopy, the process of the radiation-stimulated hydrogenation of the aluminum surface in the Al/ads n-hexane system under γ-irradiation at room temperate is studied. On the basis of the dose dependence of the Al surface specific resistance, two stages of the hydrogenation process in the absorbed dose range (0.5?120 kGy) are revealed. It is established that the transition from the first to the second stage is accompanied by a decrease in the electrical conductivity of Al by 35 times and an increase in the hydride-nanolayer thickness by an order of magnitude. AFM studies of the aluminum surface relief showed that radiation-stimulated hydrogenation is accompanied by the formation of carbon-nanotube structures. A possible mechanism for the radiation-stimulated hydrogenation of aluminum is suggested.     

Features of Forming a Structure of the Copper-Zinc Alloy Coating on the Aluminum Alloy Surface by Friction Stir Processing

Russian Physics Journal - The structure of samples of the C27400 copper alloy coatings on the AA5056 aluminum alloy surface, produced by friction stir processing of a rolled sheet package is...     

Transformation of the Surface Structure of Marble under the Action of a Shock Wave

The structure of marble fracture fragments formed after the destruction under the action of a shock wave have been analyzed by Raman, infrared, and luminescence spectroscopic techniques. It has been found that calcite I in the surface layer of fragments with thicknesses of about 2 μm is transformed into high-pressure phase calcite III. At the same time, concentrations of Mn²⁺, Eu³⁺, and other ions decrease to about onefourth of their initial values.     

微弧氧化材料表面陶瓷化机理的探讨

根据大量的实验结果总结了微弧氧化过程中的一些规律.并对铝合金微弧氧化表面陶瓷氧化层形成的机理进行了探讨． With micro arc oxidation, a ceramic oxidizing layer with the fare thickness and the high density is formed on aluminum alloys. In the work, the formation mechanism of surface ceramics on aluminum alloys with micro arc oxidation are suggested, based on the experimental data.     

Dynamic Interaction of Nitrogen Atoms with the Surface of an Aluminum Crystal

Russian Physics Journal - A possibility of reconstructing the ion-atom dynamic interaction potential from the dependence of the rainbow scattering angle of nitrogen atoms under the conditions of...     

冷轧CC5052铝合金板表层至中心层织构变化的X射线衍射分析

为了对铝合金板轧制技术发展提供依据,采用X射线衍射仪测试极图并使用专用软件计算织构的ODF,研究了热轧后经过454℃×4h预先再结晶退火处理的5052双履带连续冷却铸造铝合金板,进行不同变形量冷轧后自表层至心部层的织构分布状况。冷轧制后变形量小于40%的试样,存在织构强度由表层向中心层提高的变化梯度。变形量大于56.1%的试样,β织构的增加主要是来自剩余位向转变量随变形量的增加;主要织构β较强、Goss和剩余位向较弱,各层之间的织构状态接近。     

Dynamic Strength of a Titanium Alloy with an Electron-Beam-Modified Surface

Data are presented of plane-wave experiments aimed at determining the dynamic strength of 3M titanium alloy with a surface processed by a microsecond electron beam. It has been found that the dynamic strength of processed specimens is higher than that of unprocessed specimens. Metallographic examination of test specimens has revealed spallation macrofracture inside the unprocessed specimens and spallation microfracture at the interface between the hardened layer and the substrate in the beam-processed specimens.     

Investigations on Plasma Assisted Surface Cleaning of Aluminum in an Oxygen Glow Discharge

Aluminum plates which are contaminated with hydrocarbon containing compounds (oil, grease) were treated in an Ar-, O₂- and Ar/O₂-plasma generated by a dc-discharge. Besides a variation of the macroscopic discharge parameters (power, pressure) also different modes (anomalous glow regime, hollow cathode regime) have been studied. In most cases the contaminated substrates served as cathodes of an anomalous glow discharge where the combined influence of chemically reactive radicals and energetic ions was very effective. During the plasma process the discharge was monitored by means of power variation and optical emission spectroscopy. The spectral line intensities of several species (etchants and products) have been measured as functions of the process duration. Simultaneously the removal of the contamination layers was observed by means of in-situ ellipsometry. The temporal change of the ellipsometric parameters ψ and δ during the cleaning process was taken as a measure for the state of the surface. The combination of spectroscopic and ellipsometric measurements which indicate the progress of the plasma treatment gave interesting results on the mechanisms at the surface. In addition, surface analysis was used to assess the quality of the substrates treated.     

Effect of Ultrafine-Grained Structure of a Material on the Strength Characteristics of an Aluminum Alloy upon Impact Loads

Physics of the Solid State - An increase in the velocities of automobile and aerospace transport and, simultaneously, the necessary of decreasing their masses increase the requirements to the...     

ICP-AES法测定铝合金中钪元素的方法研究

本方法采用ICP-AES法进行铝合金中Sc元素的测定,系统研究了四十余种元素对Sc三条分析谱线的光谱干扰情况,进行了分析线的选择,分别用酸溶解法和碱溶解法溶解铝合金样品,测定了方法检出限,方法回收率98％-100.3％。该方法准确、可靠、简便、快速。     

XRF法测定锌合金中的铝

建立了XRF法测定锌合金中Al的分析方法.方法简便、快速、准确,在生产分析中发挥了重要作用.     

等离子体发射光谱法测定铝合金中的杂质元素

本文利用高频电感耦合等离子体光谱仪直接测定铝合金中的Fe,Zn,Mg,Mn,Ti,Cr和Cu杂质元素。选择了合适的实验条件,采用背景扣除法进行校正。方法简便、快速,可靠,具有良好的精密度和准确度。相对标准偏差为1．7％－6．3％,回收率为94％－105％。     

催化动力学光度法测定铝合金中痕量钛

本文研究了在硝酸介质中 ,痕量 Ti( )催化过氧化氢氧化甲基橙褪色的指示反应。优选出催化褪色反应的最佳条件 ,建立了测定痕量钛的新方法。方法的检出限为 4 .8× 10 -11g/ m L,测定范围为 0—0 .88μg/ 2 5m L,用于测定铝合金中的痕量 Ti( ) ,获得了满意的结果     

电感耦合等离子体-原子发射光谱法测定铝合金中7种元素含量

采用基体匹配技术,相同牌号的铝合金标准样品绘制校准曲线,用氢氧化钠、过氧化氢和硝酸溶解铝合金试样,电感耦合等离子体-原子发射光谱法直接测定铝合金中Cu、Fe、Mg、Mn、Si、Ti、Zn 7种元素含量.方法简便、快速.回收率95.7%-102.4%,相对标准偏差0.45%-1.21%.     

电感耦合等离子体发射光谱法测定铝合金中痕量锡

本文报道了电感耦合等离子体发射光谱法测定铝合金中痕量锡，通过标准样品分析，加标回收实验以及对铝合金实际样品的不同分析测试手段锡的测定结果的相互对照，分析结果令人满意。该方法简便，快速，灵敏度高，适合于铝合金中低含量锡的分析测定。     

钼掺杂氧化锌薄膜的结构、光学和表面等离子体特性研究

室温下,通过直流磁控反应溅射在石英衬底上制备一系列钼掺杂氧化锌薄膜。分别采用X射线衍射(XRD)、原子力显微镜(AFM)、分光光度计及拉曼光谱仪研究了钼掺杂浓度对氧化锌薄膜结构、表面形貌、光学性能和表面等离子体特性的影响。XRD测试结果表明,零掺杂氧化锌薄膜结晶良好,呈c轴择优取向,掺杂后薄膜缺陷增多,结晶质量下降,当掺杂浓度达到3.93 Wt%时,薄膜由c轴择优取向的晶态转变为非晶态。AFM测试结果表明非晶态掺钼氧化锌薄膜表面光滑,粗糙度最低可达489 pm。透射光谱表明所有薄膜样品在可见光范围(400～760 nm)平均透过率均达到80%,禁带宽度随着掺杂浓度的提高从3.28 eV单调增加至3.60 eV。吸收光谱表明氧化锌薄膜表面等离子体共振吸收峰随钼掺杂量的增大发生蓝移,而拉曼光谱表明Mo重掺杂时ZnO薄膜表面拉曼散射信号强度显著降低。通过Mo掺杂获得非晶态氧化锌薄膜,拓宽了氧化锌薄膜材料的应用领域,同时研究了Mo掺杂浓度对氧化锌薄膜表面等离子体的调控作用,这对制备氧化锌基光子器件具有重要参考价值。