Spectral Hole Burning and Photo－Stimulated LuminescenceProcesses in BaF（Cl，Br）：Sm~（2＋）

ＳｐｅｃｔｒａｌＨｏｌｅＢｕｒｎｉｎｇａｎｄＰｈｏｔｏ－ＳｔｉｍｕｌａｔｅｄＬｕｍｉｎｅｓｃｅｎｃｅＰｒｏｃｅｓｓｅｓｉｎＢａＦ（Ｃｌ，Ｂｒ）：Ｓｍ~（２＋）ＳｏｎｇＨｏｎｇｗｅｉ（宋宏伟）；ＺｈａｎｇＪｉａｈｕａ（张家骅）；ＬｕＳｈａｏｚｈｅ（吕少?..     

Study on the influence of La_2O_3 on Stress in α－Al_2O_3 Scale by a Novel Two－side Oxidation Bending Method

ＭａＸｉｎ－Ｑｉｎｇ；（马信清）；ＬｉＭｅｉ－Ｓｈｕａｎ；（李美栓）；ＬｉＴｉｅ－Ｆａｎ；（李铁藩）（ＩｎｓｔｉｔｕｌｅｏｆＣｏｒｒｏｓｉｏｎａｎｄＰｒｏｔｅｃｔｉｏｎｏｆＭｅｔａｌｓ，ＣｏｒｒｏｓｉｏｎＳｃｉｅｎｃｅＬａｂｏｒａｔｏｒｙ，Ａｃａｄｅ...     

Synthesis of Y_2O_2S：Eu~（3＋） Phosphor by Microwave Thermal Effectand Its Luminescent Properties

ＳｙｎｔｈｅｓｉｓｏｆＹ_２Ｏ_２Ｓ：Ｅｕ~（３＋）ＰｈｏｓｐｈｏｒｂｙＭｉｃｒｏｗａｖｅＴｈｅｒｍａｌＥｆｆｅｃｔａｎｄＩｔｓＬｕｍｉｎｅｓｃｅｎｔＰｒｏｐｅｒｔｉｅｓＬｉＹｕａｎｙｉｎｇ（李沅英）；ＣａｉＳｈａｏｈｕａ（蔡少华）；ＤａｉＤｅｃｈａｎ?..     

Modification of Corrosion Resistance by Yttrium IonImplantation of 304L Stainlesa Steel

ＭｏｄｉｆｉｃａｔｉｏｎｏｆＣｏｒｒｏｓｉｏｎＲｅｓｉｓｔａｎｃｅｂｙＹｔｔｒｉｕｍＩｏｎＩｍｐｌａｎｔａｔｉｏｎｏｆ３０４ＬＳｔａｉｎｌｅｓａＳｔｅｅｌＷｅｎｇＤｕａｎ（翁端）；ＷａｎｇＭｉｎ（王敏）；ＣｈｅｎＪｉａｆｕ（陈家福）；ＨｕｏＳｈｉｚｈ...     

Influence of CeO_2 on Corrosion Resistance of Laser Alloyed M_（80）S_（20） Alloy Layer

ＩｎｆｌｕｅｎｃｅｏｆＣｅＯ_２ｏｎＣｏｒｒｏｓｉｏｎＲｅｓｉｓｔａｎｃｅｏｆＬａｓｅｒＡｌｌｏｙｅｄＭ_（８０）Ｓ_（２０）ＡｌｌｏｙＬａｙｅｒ￥ＳｕＭｅｉ；ＣｈｅｎＣｈｉｎａｎ；ＷａｎｇＹｏｕ；ＬｉＤｉ；ＺｈｕＬｉｑｕｎ（ＭａｔｅｒｉａｌｓＳｃｉｅ?..     

Flame Pyrolysis Spraying of Alumina-Yttria Ceramic Coating

Ｆｉｇ．１Ｓｃｈｅｍａｔｉｃｄｉａｇｒａｍｏｆｔｈｅｔｅｓｔｅｑｕｉｐｍｅｎｔ（１）ｃｏｍｐｒｅｓｅｄａｉｒ；（２）ｅｔｈａｎｏｌｓｏｌｕｔｉｏｎ；（３）ｆｌｏｗｍｅｔｅｒ；（４）ｐｒｅｓｕｒｅｇａｕｇｅ；（５）ｓｐｒａｙｎｏｚｌｅ；（６）ｓｔａｉｎ...     

Scanning Analysis of REE in Bastnaesite with Synchrotron Radiation X－Ray Fluorescence Microprobe

ＳｃａｎｎｉｎｇＡｎａｌｙｓｉｓｏｆＲＥＥｉｎＢａｓｔｎａｅｓｉｔｅｗｉｔｈＳｙｎｃｈｒｏｔｒｏｎＲａｄｉａｔｉｏｎＸ－ＲａｙＦｌｕｏｒｅｓｃｅｎｃｅＭｉｃｒｏｐｒｏｂｅＡｎＱｉｎｇｘｉａｎｇ（安庆骧）；ＷａｎｇＲｕｉｂｉｎｇ（王锐兵）；ＤｅｎｇＳａ...     

Effects of Rare Earths on the Tempering Transformation Kinetics of High Carbon Steel

ＥｆｆｅｃｔｓｏｆＲａｒｅＥａｒｔｈｓｏｎｔｈｅＴｅｍｐｅｒｉｎｇＴｒａｎｓｆｏｒｍａｔｉｏｎＫｉｎｅｔｉｃｓｏｆＨｉｇｈＣａｒｂｏｎＳｔｅｅｌＬｉｎＱｉｎ（林勤）；ＦｕＴｉｎｇ－Ｌｉｎｇ（付廷灵）；ＤｕＹｕａｎ－Ｓｈｅｎｇ（杜垣胜）ＹｕＺｏｎｇ－Ｓ...     

Synthesis and Crystal Structure of a Heteronuclear Complex［MnSc（DTPA）（H_2O）_2］·2H_2O

ＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆａＨｅｔｅｒｏｎｕｃｌｅａｒＣｏｍｐｌｅｘ［ＭｎＳｃ（ＤＴＰＡ）（Ｈ_２Ｏ）_２］·２Ｈ_２ＯＺｈａｎｇＹｉ；ＬｉＢｉａｏｇｕｏ；ＧａｏＳｏｎｇ；ＪｉｎＴｉａｎｚｈｕ；ＸｕＧｕａｎｇｘｉａｎ（?..     

Studies on the Magnetic Properties of Rare Earth Ions and Binuclear Complexes by ~1H NMR Single Spectrometer

ＳｔｕｄｉｅｓｏｎｔｈｅＭａｇｎｅｔｉｃＰｒｏｐｅｒｔｉｅｓｏｆＲａｒｅＥａｒｔｈＩｏｎｓａｎｄＢｉｎｕｃｌｅａｒＣｏｍｐｌｅｘｅｓｂｙ~１ＨＮＭＲＳｉｎｇｌｅＳｐｅｃｔｒｏｍｅｔｅｒＹａｎｇＺｈｅｎｇｙｉｎ（杨正银）；ＸｉｕＸｉａｏｈｅ（徐晓荷）；?..     

On the microstructure of graphite spherulites in cast irons by TEM and HREM

The microstructure of graphite spherulites (G.S.) in nodular cast irons doped with either Ce or (Mg + Ce) has been extensively studied using transmission electron microscopy (TEM), μ-diffraction and lattice images techniques. The results show that the section of a well-developed G.S. consists of fan-like areas formed from platelets with sizes ranging from several to tens nm radial and hundreds nm circumferential. The [001] direction of the graphite platelets within each fan-like area tends to parallel to the radius of the G.S. but spreads about ± 10° among them. 002 Lattice images of graphite reveal the arrangement of graphite based plane layers, such as branching, bending and stages with intercalary layers besides dislocations and faults. These structural characteristics of G.S. have shown that {001} planes of graphite did grow predominatly through the formation of stages by intercalary layers of ceriumoxide and ceriumoxysulfide, then the G.S. takes its final morphology.     

Mg-Mn-Ce镁合金挤压管材各向异性与织构研究

测定了Mg-Mn-Ce镁合金挤压管材的力学性能,观察了管内侧、中心层和管外侧的金相显微组织及织构特征。结果表明,Mg-Mn-Ce挤压管材存在明显的力学性能各向异性,沿挤压方向的屈服强度和抗拉强度明显小于横向;沿壁厚方向的金相组织有一定差异,管外侧有大量的形变孪晶存在;壁厚方向存在明显的织构梯度现象,外侧面主要织构类型为(0001)基面组分,内侧面和中心层面主要织构类型为大锥面织构和棱柱面组分,这种织构梯度特性直接导致了力学性能各向异性的产生。     

Oxygen Isotope Fractionation of Common RE Fluorocarbonate

ＯｘｙｇｅｎＩｓｏｔｏｐｅＦｒａｃｔｉｏｎａｔｉｏｎｏｆＣｏｍｍｏｎＲＥＦｌｕｏｒｏｃａｒｂｏｎａｔｅＦａｎｇＴａｏ（方涛）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｃｈｅｍｉｓｔｒｙ，ＡｃａｄｅｍｉａＳｉｎｉｃａ，Ｇｕｉｙａｎｇ５５０００２，Ｃｈｉｎａ）Ｒｅ...     

Bulk growth of GaP by halogen vapor transport

A conventional vapor transport system for epitaxial growth of GaP on GaAs was modified to permit cooling of the substrate. As a result of this modification crystals of more than 6 mm thickness have been grown. A number of etchants reveal etch grooves on (111) and (110) faces of halogen transported GaP. In such material both microtwin lamellae and stacking faults have been identified by electron microscopy. It was shown that the density of the etch grooves depends on the surface preparation and that it decreases exponentially with increasing distance from the substrate. Macroscopic defects containing excess dopant have been associated with deep pits visible on the growth face. It is suggested that the excess dopant is incorporated by a facet effect. Diodes having external quantum efficiencies as high as 1.5 pct were made by depositing zinc- and oxygen-doped layers by liquid epitaxy directly on tellurium-doped halogen grown GaP. However, the external quantum efficiencies decreased by a factor of 100 when material grown next to the GaAs substrate was used. It was shown that the decrease in the efficiency was not due to high stacking fault densities. Evidence is submitted that the arsenic content of the first to grow layers is deleterious to diode efficiencies.     

Experimental Investigation of the Ce-Mg-Mn Isothermal Section at 723 K (450 °C) via Diffusion Couples Technique

The isothermal section of the Ce-Mg-Mn phase diagram at 723 K (450 °C) was established experimentally by means of diffusion couples and key alloys. The phase relationships in the complete composition range were determined based on six solid–solid diffusion couples and twelve annealed key alloys. No ternary compounds were found in the Ce-Mg-Mn system at 723 K (450 °C). X-ray diffraction and energy-dispersive X-ray spectroscopy spot analyses were used for phase identification. EDS line-scans, across the diffusion layers, were performed to determine the binary and ternary homogeneity ranges. Mn was observed in the diffusion couples and key alloys microstructures as either a solute element in the Ce-Mg compounds or as a pure element, because it has no tendency to form intermetallic compounds with either Ce or Mg. The fast at. interdiffusion of Ce and Mg produces several binary compounds (Ce _x Mg _y ) during the diffusion process. Thus, the diffusion layers formed in the ternary diffusion couples were similar to those in the Ce-Mg binary diffusion couples, except that the ternary diffusion couples contain layers of Ce-Mg compounds that dissolve certain amount of Mn. Also, the ternary diffusion couples showed layers containing islands of pure Mn distributed in most diffusion zones. As a result, the phase boundary lines were pointing toward Mn-rich corner, which supports the tendency of Mn to be in equilibrium with all the phases in the system.     

圆形堆取料机在铜闪速冶炼中的应用

从圆形堆场堆取料机的基本结构、工作原理入手,对比了仓式存储配料方式与侧堆桥取式的不同。实践证明,圆形穹顶式堆取料机具有场地利用率高,所需要设备少,运行成本低,堆取料作业无需设备的相对移动,工作效率高,料层混合更加均匀,穹顶钢构形式更加节省基建费用等优点,能为闪速吹炼提供了良好的运行条件。     

Micromechanical Modeling of Filament Wound Cement-Based Composites

A theoretical model to predict the response of laminated cement-based composites is developed. The micromechanical model simulates the mechanical response of a multilayer cement-based composite laminate under uniaxial, biaxial, and flexural loading modes. Tsai-Wu Criterion is used for each lamina and the stacking sequence is utilized to obtain the overall stiffness matrix. The effect of distributed cracking on the stiffness degradation of the cross ply layers under tensile loading is measured using a scalar damage parameter that is empirically related to the apparent strain. The model is calibrated by predicting the load versus deformation response of unidirectional, cross ply, and angle ply laminates under tensile and flexural loading. Results are then compared to the experimental results cross ply and angle composites with various stacking sequences.     

国标球墨铸铁管码垛高度的计算方法

根据国家标准GB/T 13295:2008《水及燃气管道用球墨铸铁管、管件和附件》、国际标准ISO10803:1999《球墨铸铁管设计方法》中对球墨铸铁管各项性能指标的要求,利用材料力学的理论,通过建立铸管堆放、受力分析的简化模型,对球墨铸铁管的堆放层数及高度进行了分析计算,提出了一套球墨铸管码垛高度的计算方法,此方法可以很好地解决铸管在仓储、装船运输时的码垛问题。     

Syntactic Intergrowth Structure in the Calcium-Rare Earth Fluorocarbonate Minerals

Ｔｈｅｃａｌｃｉｕｍｒａｒｅｅａｒｔｈｆｌｕｏｒｏｃａｒｂｏｎａｔｅｍｉｎｅｒａｌｓｅｒｉｅｓｉｓａｎｉｍｐｏｒｔａｎｔｍｉｎｅｒａｌｆａｍｉｌｙｉｎｒａｒｅｅａｒｔｈｆｌｕｏｒｏｃａｒｂｏｎａｔｅｓ，ｉｎｃｌｕｄｉｎｇｂａｓｔｎａｅｓｉｔｅ（Ｂ），...     

Investigation of Formation and Inhibition Mechanism of Cerium Conversion Films on Al 2024 Alloy

To study the mechanism of formation and inhibition of Ce conversion films on A1 2024-T3 alloy, scanning microreference electrode technique (SMRE) is used to probe the potential map on A1 2024-T3 in CeC13 solution, the localized corrosion of A1 alloy decreases with immersion time and disappears finally, which results from the competition of Cl^- aggression and Ce^3 inhibition on alloy surface. The results of X-ray photoelectron spectroscopy (XPS) indicate that the Ce conversion films consist of Al2O3, CeO2 and Ce2O3 (Ce(OH)3), and CeO2/Ce2O3 ratio decreases with the immersion time. When a critical pH for Ce(OH)3 formation was reached, Ce(OH)3 will precipitate on the micro cathodic area on alloy surface. Consequently, H2O2, the product of the catholic reaction will oxidize a part of Ce(OH)3 to CeO2, which appears a better corrosion resistance for Al alloys.