科技论文写作的基本要求与常见问题

列举了科技论文的标题、摘要、正文、图表和和统一规范,为科技期刊的作者和编辑提供借鉴.     

Influence of zinc on electrochemical discharge activity of Mg-6%Al-5%Pb anode

Mg-6%Al-5%Pb (mass fraction) anodes with different contents of zinc were prepared by melting and casting. The electrochemical discharge behavior of these anodes in 3.5% NaCl solutions was investigated by galvanostatic test and electrochemical impedance spectroscopy (EIS). The microstructures and the corroded surfaces of these anodes were studied by scanning electron microscopy (SEM) and emission spectrum analysis (ESA). The phase structures and the corrosion products of the anodes were analyzed by X-ray diffraction (XRD). The results show that zinc promotes the grain refinement of Mg-6%Al-5%Pb anode and makes the average discharge potential of Mg-6%Al-5%Pb anode more negative during galvanostatic test. Mg-6%Al-5%Pb anode with the addition of 1% (mass fraction) zinc has the best electrochemical performance. The activation mechanism of zinc to Mg-6%Al-5%Pb anode is as follows: The hydrolyzation of dissolved Zn²⁺ ions reduces the pH value of the solution near the surface of the anode and accelerates the dissolution of Mg(OH)₂ film; The precipitated Zn(OH)₂ with similar structure as Mg(OH)₂ combines with Mg(OH)₂ film easily and makes it break down.     

Ni-Al系、Fe-Al系和Ti_3Al金属间化合物研究进展

简要介绍了金属间化合物的熔炼与铸造工艺。论述了Ni Al系 (包括NiAl和Ni3 Al)、Fe Al系 (包括Fe3 Al和FeAl)及Ti3 Al基金属间化合物高温结构材料的研究现状和发展动态 ,分析了上述合金存在的问题及解决办法 ,介绍了它们在不同领域的潜在应用。     

氧化锌铝陶瓷(AZO)靶材的制备及其电阻性能的测定

采用二步烧结技术制备AZO陶瓷靶材,并采用XRD、SEM和EDS对AZO陶瓷靶材进行表征,研究AZO靶材的电阻性能。结果表明:当Al的掺杂量w(Al2O3)为0.5%时,AZO靶材出现第二相ZnAl2O4;随Al掺杂浓度增加,ZnAl2O4的衍射峰强度逐渐增强,ZnO晶粒尺寸逐渐减小;随着第二步烧结温度θnd的升高,AZO靶材的晶粒尺寸逐渐增大,相对密度也随之增加。靶材的电阻率随θnd增加而降低,且随掺杂浓度升高而增加;在第一步烧结温度θst=1 400℃,升温速率vst=10℃/min,第二步烧结温度θnd=1 350℃和t nd=16 h烧结条件下,AZO陶瓷靶材(w(Al2O3)=1.5%)的电阻率仅为2.9×10-2Ω·cm。     

Metallographic study of thermoelastic martensite transformation in a Cu-Zn-Al alloy

1INTR0DUCTI0NCu-baseshapememoryalloy(SMA)isalow-priceandhigh-qualityall0y.Itsshapemem-oryeffect(SME)comesfromthetherm0elasticmartensitetransformation.Thestructureofmartensiteandthepr0cedureofmartensitetransf0rmationhavebeenstudiedbymeans0fopticalmicroscopy0bservation,X-raydiffractionandTEMf0rmanyyears.TheearlystudieswhichwereconcentratedonthemonocrystallineCu-ZnalloyandCu-Zn-Gaall0yplayakeyroleintheestablishment0fthemechanismofSME[l'z].D.l..y[3]andC..L4jstudiedthemartensitetransfor…     

TiAl基合金的抗氧化性及其改善

简要介绍了ＴｉＡｌ基合金的应用及目前存在的主要问题。阐述了在ＴｉＡｌ基合金上不易形成连续的Ａｌ２Ｏ３膜的”氮效应”,指出“氮效应”似乎是阻碍ＴｉＡｌ合金空气中形成连续的Ａｌ２Ｏ３膜的主要障碍。     

点阵材料及其3D打印EI北大核心CSCD

点阵材料是由一种或多种结构单元,按照特定方式(如周期、拓扑、分形等)优化组合构筑而成的具有特殊物理性能的一类新材料,在光、电、力、热、声、磁、生物化学等领域均具有巨大的应用潜力。3D打印技术极大地推动了点阵材料的发展,提高了点阵材料的可设计性,使制备具有形状复杂、尺度细小的点阵材料成为现实。本文综述了点阵材料的研究进展:阐述了点阵材料结构单元的类型及特征;归纳了点阵材料的制备方法;总结了点阵材料的性能及应用;最后探讨了点阵材料的发展方向。     

Ce添加对AP65镁合金显微组织及电化学性能的影响

采用熔炼铸造法制备添加不同含量Ce的AP65镁合金。采用X射线衍射(XRD)、扫描电镜(SEM)和电子探针(EPMA)研究Ce对AP65镁合金显微组织的影响。采用恒电流放电、动电位极化扫描、化学浸泡研究不同Ce含量AP65镁合金的腐蚀电化学行为。结果表明:随Ce含量增加,合金中依次出现棒状或簇状的Al4Ce相和块状的Al2Ce相。Ce的添加导致AP65镁合金的电化学性能明显提高,添加0.6%(质量分数)的Ce使AP65镁合金的平均放电电位从-1.648 V(vs SCE)负移到-1.756 V(vs SCE);添加4%的Ce使AP65镁合金具有较小的腐蚀电流密度(19.66μA/cm2)和较高的阳极利用率(84.3%),与未添加Ce的AP65镁合金相比,阳极利用率提高16.6%。     

Fe-Al、Ti-Al和Ni-Al系金属间化合物多孔材料的研究进展

总结Fe-Al、Ti-Al、Ni-Al 3大系金属间化合物的物相结构和基本特性,论述Fe-Al、Ti-Al和Ni-Al 3大类金属间化合物多孔材料的制备方法、孔结构表征以及耐腐蚀性能,并指出孔结构参数的可控性研究、复合材料的制备和焊接性能的提高是金属间化合物多孔材料未来的研究重点.