多元微合金钢中的应变诱导复合析出

采用透射电子显微镜结合纳米束能谱技术,研究了含Nb,Ti,Mo等多种微合金元素的超低碳贝氏体钢在奥氏体非冉结晶区终轧后弛豫阶段的应变诱导析出行为.实验结果表明:经30%预变形后,在850℃和900℃等温弛豫时,钢中析出开始主要有纯Nb及Nb-Ti复合的两类,以后者为主.随弛豫时间延长,纯Nb型析出物消失,复合夹杂中铌钛比增加.弛豫阶段后期,Mo会以置换原子形式进入(Ti,Nb)(C,N)的面心立方晶格中,其量随弛豫时间的延长而增加.析出物形状以不规则外形为主,其密度及平均尺寸与变形温度和弛豫时间密切相关.     

溶胶凝胶法制备含银Na2O-B2O3-SiO2玻璃

提出以溶胶凝胶法制备含银Na₂O-B₂O₃-SiO₂玻璃的工艺及制备过程,用X射线衍射及红外吸收光谱分析制备过程中结构变化,用光学吸收谱、透射电镜及能谱分析确定银胶体粒子的存在及其分布.结果表明,溶胶凝胶法制备与传统熔融法制备的玻璃有相同的结构,且通过适当的热处理工艺可以获得尺寸有一定分布的银粒子.该方法既可以用于颜色玻璃的制备,其产品也可作为制备其他材料的原料.     

乳化液废水处理方法

针对某钢管公司的乳化液废水,采用\     

Silicon-based inorganic-organic hybrid optoelectronic synaptic devices simulating cross-modal learning

With advances in Si-based technology infrastructures and the rapid integration of Si-based op-toelectronics,Si-based optoelectronic synaptic devices have the po...     

Tuning the pinning direction of giant magnetoresistive sensor by post annealing process

The Internet of Things has created an increasing demand for giant magnetoresistive (GMR)sensor owing to its high sensitivity,low power-consumption and small siz...     

Flash memory based computing-in-memory system to solve partial differential equations

Dear editor, Many emerging non-volatile memories (NVM),such as re-sistive random access memory (RRAM)[1],phase-change memory (PCM)[2],and ferroelectric RAM (FeR...     

OPTIMIZING LAYOUT OF URBAN STREET CANYON USING NUMERICAL SIMULATION COUPLING WITH MATHEMATICAL OPTIMIZATION

1. INTRODUCTION Vehicular emissions have become one of thmain sources of urban atmospheric pollution in Chinwith the development of the urban construction andthe increase in the number of vehicles. There are lots of factors influencing the transport and dispersion of vehicular exhausted pollutants and further influencing the local air quality, among which the gas dynamical effect due to the mechanical turbulence from huge buildings and street canyons is especially remarkable. Previous stu…     

STUDIES ON RETRIEVAL OF THE TURBULIVITY OF ATMOSPHERIC BOUNDARY LAYER

1. INTRODUCTION Human activities mainly occur in the atmospheric boundary layer and turbulent transfer is a key factor for the exchange of substance and energy of the earth-atmosphere system, so atmospheric turbulence must be described accurately for all …     

两种典型山地地形的输电塔受力分析

目的 受典型微地形影响,架空输电线路遭受的风速会增大,因此需要研究微地形对输电塔受力的影响。 方法 比较了中国规范、美国规范和澳洲规范的山峰和山坡两种典型山地地形的地形系数,对地形系数进行了参数计算,分析了地形系数的分布规律。计算了不同规范、不同路径方向和不同位置的输电塔塔身主材内力。 结果 结果表明：中美澳规范的地形系数的分布规律基本一致,受坡度、水平距离和竖向高度影响的程度有差异;线路沿山顶走线时,塔身主材受力最大;地形系数比风速增大10%对铁塔受力影响更大。 结论 建议输电线路尽量垂直跨越山顶,两种典型山地地形处的输电塔需考虑地形系数的影响。     

LiF和CaF2助熔效果的研究

通过抗弯强度测试研究了LiF和CaF₂对陶瓷结合剂性能的影响.结果表明在Al-Si-O系陶瓷结合剂中,CaF₂的析晶现象明显大于LiF.以LiF为助溶剂的陶瓷结合剂比用CaF₂为助溶剂的陶瓷结合剂熔点低、粘接强度大.当以LiF为助熔剂时,可以用摩尔数比值（Al₂O₃+B₂O₃）/（R₂O+RO+0.5LiF）判断陶瓷结合剂自身的强度.