Abstract:通过淬火工艺制备了 4Ag I· Ag2 WO4材料 ,并使用 X射线衍射、热示差等分析方法研究了该种材料的结构和导电性。结果表明 ,4Ag I·Ag2 WO4材料是非晶态的玻璃 ,并具有很高的离子导电率。

Abstract:A criterion on the evaluation of thermodynamic data of binary and ternary intermetallic compounds is derived on the basis of the minimum free energy principle and the nature of convex downward surface. As an example, the Gibbs free energy of formation of ternary phase T (Mo 5Si 3C) in the system Mo Si C is estimated.

Abstract:The electrochemical properties of new type Ti 3Ni 2 hydrogen storage electrode have been studied in detail. It is shown that the largest discharge capacity of Ti 3Ni 2 electrode reaches 384 5 mAh/g at 353K and 145 5 mAh/g at 278 K (corresponding to Ti 3Ni 2H 3 7 and Ti 3Ni 2H 1 47 hydride respectively). At high temperature (353K) two plateaus of discharge curve appear, but at low temperature only one plateau. Compared with Ml (NiCoA1Mn) 5 electrode, the dynamics of Ti 3Ni 2 electrode is poor. The discharge capacity, dynamics and charge retentivity of Ti 3Ni 2 electrode are improved greatly at high temperature.

Abstract:利用挤压铸造法制备了 Al2 O3纤维增强 Al合金复合材料 ,对其界面孔隙率进行了测定 ,结合拉伸强度数据 ,讨论孔隙率对复合材料强度的影响 ;并通过有限元计算 ,分析了与拉伸轴平行、成 45°及与拉伸轴垂直的 3种纤维模型 ,得出纤维、基体、界面处应力分布。

Abstract:Mm (NiCoMnAl) 5 alloy has been treated by buffer solution at room temperature, and the electrochemical performances of the alloy have been investigated. The results show that the activation behavior, initial discharge capacity and cycling stability of the alloy treated by buffer solution (pH=4 5) for 2 h are improved.

Abstract:Effect of additive CeO 2 on thermal shock resistance of plasma sprayed ZrO 2 coating has been investigated using SEM, EPMA and thermal shock tests. As mass fraction of additive CeO 2 increases 0 to 9 0%, the lifetimes of fracture initiation and fracture failure increase 32 and 46 cycles to 76 and 105 cycles respectively. Net shaped microcracks well distributed in ZrO 2+9 0% CeO 2 coating resulted in decreasing stress and critical temperature of fracture initiation in coating, so the thermal shock resistance increases.

Abstract:Nanocrystalline Yb 2O 3 of various particle sizes was prepared using sol gel method. XRD analysis shows that the prepared nanocrystalline Yb 2O 3 is cubic in structure with space group Ia3. TEM photographs indicate that Yb 2O 3 nanoparticles are basically spherical in shape. Calculation of crystallite size indicates that the average crystallite size of Yb 2O 3 increases with increasing calcination temperature, but the average crystal lattice distortion rate decreases with increasing calcination temperature and crystallite size. This reault shows that the smaller the crystallite size, the bigger the crystal lattice distortion, and the worse crystal growth. Solubility test of Yb 2O 3 in nitric acid shows that the surface activity of Yb 2O 3 increases with decreasing crystallite size. Fourier Transform Infrared Spectrometer (FTIR) spectra reveal that nanocrystalline Yb 2O 3 has higher surface activity than that of ordinary Yb 2O 3. Absorbance intensity of Yb O bond of nanocrystalline Yb 2O 3 is weaker than that of ordinary Yb 2O 3, and the absorbance of Yb O bond of nanocrystalline Yb 2O 3 is small blue shifted.

Abstract:The rare earth solid superacid SO 2- 4/TiO 2/La 3+ was prepared. The synthesis of diethyl sebacate has been studied using ethanol absolute and sebacic acid as reactants, and rare earth solid superacid SO 2- 4/TiO 2/La 3+ as catalyst. The influence factors of reaction were investigated. The results show that it is a good catalyst for esterifications.

Abstract:The developmental history and fields of application of magnetostrictive materials are presented. The various characteristics of the materials are compared with that of piezoelectric(PZT) material P b(Zr, Ti)O 3. Some research works on ultraprecise micromoving actuator and optic fiber magnetoelastic sensor in Wuhan University of Technology are reported. The application situation of the materials in the future is also discussed.

Abstract:通过淬火工艺制备了4AgI

Abstract:根据最小自由能原理和向下凸曲面性质推导出估算三元系和二元系金属间化合物热力学数据的判断式，并以Mo-Si-C三元系为例，估算了三元相T（Mo5Si3C）的Gibbs生成自由能。

Abstract:The kinematics of particulate drop in plasma is studied, and the velocity equations of particulate drop are provided. The experimental study of kinematics of SiGe alloy particulates has been carried out. The results indicate that for increasing the purity effect, the drop time of the particulates must increase, and the particulate velocity must decrease. This study could be applied to fabrication of high purity materials by cold plasma.

Abstract:The fracture mechanism of fully lamellar Ti 49at% Al alloy has been investigated by studying the interactions between crack and lamellae or grain boundary. The results indicate that the nucleation and propagation mechanism of crack depend on not only lamellar orientation in grain but also the type of grain boundary. As the angle between tensile axis and lamellae is relatively large, main cracks propagate by nucleation, growth and linkage with interfacial microcracks. As the tensile axis is nearly parallel to the lamellae, translamellar cracks propagate by nucleation, growth and linkage with two types of microcracks, e g interface delamination and translamellar microcracks. Different types of grain boundary have different toughening effects on TiAl alloy, that is, interlock grain boundary nearly parallel to the tensile axis is beneficial to fracture toughness, and the grain boundary nearly perpendicular to the tensile axis is not beneficial.

Abstract:研究了Ti-48Al (0.2～0.8)at%B合金中硼化物的生长机理。结果显示：合金中的硼化物均为C32结构的TiB2相；在加入0.2at%和0.5at%B的合金中只存在带状TiB2相；而加入0.8at%B的合金中除带状TiB2相外，还出现了少量六方形貌的块状TiB2相，块状硼化物是从液相中自由生长的初生TiB2相，其惯习面为（0001）基面和｛10∧-10｝柱面；而带状硼化物则是次生TiB2相，是通过L→β TiB2和L β→α TiB2反应与基体耦合生长的非规则共晶反应产物。两种形貌的TiB2颗粒均以台阶方式生长。

Abstract:研究了新型储氢合金电极Ti3Ni2的电化学性能。实验结果表明：Ti3Ni2合金电极的最大放电容量达到384.4mAh/g(353K),相当于Ti3Ni2H3.7。在278K，最大容量为145.5mAh/g，相当于Ti3dNi2H1.47。高温条件下（353K）放电曲线有2个平台，在温度比较低时，放电曲线只有1个平台，与Mι（NidCoMnAl）5合金相比，Ti3Ni2合金电极的动力学性能不好， 此外，温度对Ti3Ni2合金电极的电化学性能影响明显。在温度比较高的条件下，合金的放电容量，动力学特性、荷电保持能力均有大幅改善。

Abstract:The crevice corrosion of the benzotriazole(BTA) passive specimens of the shape memory alloy Cu Zn Al in Hank's artificial body fluid has been studied using electrochemical tests. The results show that the shape memory alloy Cu Zn Al exhibits better property than the annealed alloy Cu Zn Al. The reason is that the martensite single phase in the alloy Cu Zn Al improves electrochemical property and inhibits active solution. The occurring of crevice corrosion is attributed to the metal ions concentration cell. BTA passivation improves the crevice corrosion resistance of the alloy.

Abstract:研究了Ti0.8Zr0.2Mn2-xCrx(x=0.2,0.4,0.6,0.8和1.0）系、Ti0.9Zr0.2Mn1.8V0.2和Ti0.9ZrxMn1.8-yCryV0.2(x=0.1,0.15和0.2);y=0.2和0.4）系AB2型Ti-Mn基合金的储氢性能和晶体结构。结果表明：Zr元素对A侧Ti的部分置换和A侧过化学计量可显著提高合金的活性性能及吸放氢量。这些合金的主相均为C14型Laves相，其储氢量随点阵参数a,c和晶胞体积V的增加而提高，当a≥0.4894nm,c≥0.8040nm或V≥0.1668nm∧3时，储氢量可达到235ml/g以上。

Abstract:对高度稳定化β型阻燃钛合金Ti40的氧化机理和氧化层剥落机理进行研究表明：合金氧化增重随温度升高明显增加，至1050℃反而降低；600℃的氧化膜主要为TiO2和V2O5，高于700℃氧化，因V2O5的挥发，氧化膜主要为TiO2，随温度升高，氧化物晶粒粗化，氧化膜疏松多孔，与基体黏附性降低，不低于900℃时开裂和剥落，不低于800℃氧化，氧化层疏松还存在SiO化合物，温度升高，SiO数量增多，由圆形球变为星形，至1050℃随氧化层剥落而消失；剥落后的基体氧化层仍为疏松状，有不连续分布的Cr2O3膜存在，同时还分析了Ti40合金不抗氧化的原因及氧化机理，提出了氧化机理模型。在分析氧化膜内应力产生及内应力释放机制基础上，提出了Ti40合金氧化层开裂、剥落机理。

Abstract:利用挤压铸造法制备了Al

Abstract:对 Cu- Al合金的内氧化工艺及其动力学进行了系统研究。结果表明 :本实验条件下以 12 2 3K,0 .5 h内氧化工艺所得材料的性能最佳 ,其显微组织特征是 Cu基体上均匀弥散分布着纳米级 γ- Al2 O3粒子。理想条件的内氧化初期和实际条件下的内氧化动力学曲线服从抛物线规律。温度、时间、Cu- Al合金粉颗粒半径和 Al浓度是实际内氧化控制的 4要素 ,它们间的函数关系近似满足下式 :t=6 .79R2 CBexp(2 32 5 1/T)。实际内氧化时间不宜过长 ,内氧化温度应该 :112 3K

Abstract:A Ni B coating was prepared using chemical plating. XRD analysis shows that the microstructure of as coating is a mixture of amorphous and supersaturated solid solution. The microstructural transformation and properties of the coating for different heat treatment conditions are discussed in details. Ni 2B formed during high temperature ageing. Room temperature ageing was also observed. The age hardenability depends on existence and quantity of Ni 2B, and the transformation mode from Ni 2B to Ni 3B.

Abstract:Effect of cerium content on phase structure, electrochemical properties and pressure concentration temperature ( P C T ) characteristics of Ml (NiCoAlMn) 5 alloy ( Ml =Michmetal) has been investigated. Experimental results indicate that as cerium content increases, the lattice constants ( a,c ), cell volume ( V ) and axis ration ( c/a ) of the alloy decrease; the elemental segregation in dendrite increases; the discharge capacity decreases; the cycling stability increases; the plateau pressure of P C T curve increases. The alloy with 15 at% Ce has optimum comprehensive electrochemical properties.

Abstract:采用室温下缓冲溶液的浸渍处理方法对Mm(NiCoMnAl）5 合金进行表面改性，研究了缓冲溶液pH值和浸渍处理时间对合金电化学性能的影响。试验结果表明：采用pH值为4.5的缓冲溶液浸渍处理2h可以改善Mm(NiCoMnAl）5合金的活化性能，初始放电容量和循环稳定性，但对高倍率放电性能的改善作用并不明显。

Abstract:CaCuO 2 content has been optimized for two powder process. The experimental results indicate that as precursor powders have 5% excessive CaCuO 2, the critical current density of tape increases about 10%. During the reaction process, excessive CaCuO 2 afford enough liquid phase which accelerate the 2223 phase formation, but too much CaCuO 2 (>15%) will produce impure phases at grain boundary. Large impurity particles decrease the texture degree of the 2223 phase and critical current density of the tape.

Abstract:The effects of bonding materials on electrochemical characteristics of amorphous Mg Ni alloy electrodes have been investigated. The experimental results show that there are a little differences between the electrodes used Cu and/or Ni as bonding materials due to comprehensive effects of corrison resistence, internal electrical resistance and catalytic properties of the materials. As Co is used as bonding material, the electrochemical capacity and degradation of the electrode are improved greatly.

Abstract:采用SEM，EPMA和热震方法，研究了CeO2添加剂对等离子喷涂ZrO2i涂层抗热震性能的影响。结果表明：当CeO2由0增加到9.0%（质量分数，下同）时，涂层的抗热震起裂次数和失效次数分别由32次和46次增加到76次和105次；继续增加CeO2，涂层的抗热震性能急剧下降。ZrO2 9.0?O2涂层在热循环中形成的网状微裂纹，不仅可降低涂层中的应力，也可提高涂层开裂的临界温差，从而可改善其抗热震性能。

Abstract:用溶胶-凝胶法制备了不同粒径的Yb2O3纳米晶。XRD分析表明：所合成的Yb2O3纳米晶属于立方晶系，空间群为Ia3。TEM分析表明：所合成的Yb2O3粒子基本呈球形。计算表明:Yb2O3的平均晶粒度随焙烧温度的升高而增大，而平均晶格畸变随焙烧温度的升高和晶粒度的增大而减小，表明晶粒越大，晶格畸变越大，微晶发育越不完整。溶解性试验表明：Yb2O3晶粒度减小，表面活性增加。FTIR光谱分析表明：纳米Yb2O3比普通的Yb2O3具有更高的表面活性，Yb-O键的吸收强度减弱，有微小的蓝移。

Abstract:制备了稀土固体超强酸SO∧2-4/TiO2/La∧3 ，研究了以其为催化剂，葵二酸和无水乙醇为原料合成葵二酸二乙酯，并考察了影响反应的因素。结果表明，它是一种良好的酯化催化剂。