超细WC-Co硬质合金的磁性能和金相分析

介绍了超细WC-Co硬质合金的磁性能和金相,对它们之间的关系和作用进行了比较分析,认为磁性能和金相是超细WC-Co硬质合金质量控制的重要检测方法。     

LF炉精炼渣冶金性能的研究现状

主要从精炼渣组分对其发泡性能和脱硫性能的影响二个方面综述了精炼渣的研究现状，展望了精炼渣的发展前景和方向，为今后精炼渣的研究和使用提供依据和参考。     

Modeling the Mechanical Behavior of Lung Tissue at the Microlevel

This paper is concerned with the development of a computational model of pulmonary alveoli against the background of ventilator-induced lung injuries. In order to quantify mechanical stimulation of alveolar tissue during artificial respiration, a detailed constitutive model of alveolar septa and an approach to consider interfacial phenomena is needed. For that purpose, a polyconvex hyperelastic material model formerly developed for arteries is adopted for pulmonary alveoli. Information about tissue morphology is inherently integrated into the constitutive model, therefore, establishing a connection between structure and function of the different septal constituents. Structural and interfacial dynamics are directly coupled at the alveolar surface. In order to take into account the complex behavior of surface active agents covering alveoli, a constitutive model considering dynamical changes of surface energy is employed.     

V含量对TaVCN复合膜微结构、力学性能和摩擦磨损性能的影响

采用多靶磁控溅射技术,制备一系列不同V含量的TaVCN复合膜。利用X射线衍射仪、纳米压痕仪和高温摩擦磨损仪研究该复合膜的微结构、力学性能和摩擦磨损性能。结果表明, TaVCN复合膜为面心立方和底心斜方的双相结构。随V含量增加,复合膜的硬度先升高后降低,当V原子分数为26.85%时,复合膜的硬度达到最大值,为31.7 GPa。室温下随V含量增加,复合膜的摩擦因数和磨损率均先减小后增大,V原子分数为32.60%时,摩擦因数达到最小值,为0.213;V原子分数为26.85%时,磨损率达到最小值,为2.1×10?7 mm2/N。随温度升高,复合膜的摩擦因数逐渐减小,磨损率逐渐增大。并对不同温度下 TaVCN 和 TaCN 复合膜的摩擦磨损性能进行了讨论。     

Review of the historical, empirical, and theoretical status of the von Restorff phenomenon.

The major purpose of the review was to examine theoretical and empirical properties of the von Restorff phenomenon. A selection of studies that preceded the von Restorff article demonstrated that isolating an item by making it more vivid than the rest of the list yielded a positive influence on learning that item. Subsequent studies in a variety of contexts have been quite consistent in confirming that isolation facilitates learning of the isolated item. This review attempts to indicate some of the specific features and influences of the von Restorff effect. The final section of the article presents theoretical discussions and suggested attempts to explain the isolation effect. (2 p. ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

30万,60万千瓦汽轮机紧固件用高温合金的研究

本文研究了GH26合金成分中最佳碳钛含量,抗应力松弛性能、抗蠕变性能和抗应力腐蚀性能,合金组织和在使用温度下长时时效后组织稳定性。合金制作的紧固螺栓和汽封弹簧片等部件已用于国产首台引进60万千瓦汽轮机组上。     

Nd-doped ZnO as a multifunctional nanomaterial

Chemically synthesised ZnO and Nd-doped ZnO nanoparticles were investigated for structural, optical, magnetic properties along with photocatalytic activity. Transmission electron microscopy measurement was performed on the undoped and doped ZnO nanoparticles. Compared to the undoped ZnO, Nd-doped ZnO nanoparticles showed enhanced photoluminescent and ferromagnetic properties. The Nd-doped ZnO nanoparticles also showed improved photocatalytic properties compared with the undoped ZnO nanoparticles. Furthermore, the effect of UV light irradiation was studied with thermoluminescence (TL) and photoluminescence (PL) measurement techniques. It was found that in case of Nd-doped ZnO nanoparticles TL intensity increased while the green emission in PL spectra decreased with UV-light irradiation. This was attributed to the production of more surface defects on UV irradiation on Nd-doping.     

Effect of Nd2O3 doping on the electrical properties of Ba0.96Ca0.04Ti0.90Sn0.10O3 ceramics

The Ba_(0.96)Ca_(0.04)Ti_(0.90)Sn_(0.10)O_3-xNd_2 O_3(x = 0-0.08%) ceramics were prepared via traditional solid-state sintering method. The influences of Nd3+ substitution on the phase structure, dielectric properties,piezoelectric and ferroelectric properties of the ceramics were investigated. All the samples possess pure BaTiO_3-type perovskite structure. MPB with orthorhombic and tetragonal phase coexist at around x = 0.03-0.04. Nd~(3+) doping decreases both Tc and T_(O-T) to lower temperature. All the samples exhibit an intermediate state with the coexistence of ferroelectric and diffuse relaxor ferroelectric behavior with the addition of Nd~(3+). The electric properties of the ceramics were optimized at x = 0.03 with d33, K_p, ε_r and P_r values of 545 pC/N, 51.9%, 24,412 and 10.74 μC/cm~2.     

航空用高强度结构钛合金的研究及应用

对航空领域广泛使用的高强度结构钛合金Ti—15—3(TB5)，β21S(TB8)，Ti—1023(TB6)和BT22(TC18)的研究现状进行了综合评述和对比分析。     

外科植入物用第三代新型医用钛合金研究

为了实现传统医用钛合金的更新换代,我们设计研制了第三代医用TZNT钛合金,本文介绍了该合金的设计思想以及力学、腐蚀、生物学等性能。