铅基板栅合金综合性能探析

在Pb-Ca-Sn-Al合金的基础上尝试添加第五种合金元素，测试其电化学性能，并在理论上讨论了其性能提高的原因。     

在严寒季节施工时砼的防冻与裂缝控制

在-26．5℃～-18℃的低温条件下进行砼工程施工时，依据经验及保温能力预先对砼的出机温度及入模温度进行了假定性计算，而后据此对砼施工的全过程进行了温度控制，确保了砼工程的施工质量，总结出了一套操作性强的技术措施。     

三元硼化物金属陶瓷覆层材料耐腐蚀性能研究

以Mo粉、FeB合金粉和Fe粉为基本原料，分别加入Cr、Ni、C或同时加入Cr、Ni、C合金元素成分，采用原位反应真空液相烧结工艺，在Q235钢基体上制备三元硼化物金属陶瓷覆层材料。研究了合金组分对覆层材料耐腐蚀性的影响。结果表明，三元硼化物金属陶瓷覆层材料的覆层具有远比钢基体优越的耐蚀性，C组分的单独加入降低了覆层的耐蚀性，Cr、Ni组分的加入显著提高了覆层的耐蚀性，同时加入Cr、Ni、C作为合金组分使覆层具有最佳的耐蚀性。     

Thermal characterization of gallium arsenic nitride epilayer on gallium arsenide substrate using pulsed photothermal reflectance technique

Thermal conductivity of gallium arsenic nitride (GaAsN) epilayer on gallium arsenide (GaAs) substrate prepared by molecular beam epitaxy technique was measured using pulsed photothermal reflectance technique. Three-layer model incorporated thermal boundary resistance was applied to extract the thermal properties from the sample's photothermal response. Within the thickness ranging from 20 to 80 nm, no thickness dependent relationship with thermal conductivity of GaAsN epilayer was found, and the average thermal conductivity is approximately 27 W/mK at room temperature. The thermal boundary resistance at the Au/GaAsN interface is in the order of 10⁻⁸ m²K/W.     

Research on Processes and Adhesion of Electroless Plating Ni-Cu-P Coating

In order to improve the corrosion and wear resistance of the coatings of electroless plating Ni-Cu-P and broaden its application, an optimizing mathematical theory test has been applied in this research. The processing parameters have been optimized and some Ni-Cu-P coatings have been obtained with smooth and glittering appearance. At the same time,the composite complexants can prevent copper from depositing first and obtain coatings with strong adhesion. The porosity of Ni-Cu-P coating (20 μm) ranked class 9. The changing color time of the coating is more than 800 seconds with HNO3 dropthan 0.5 g/L. The surface appearance of deposition is typical cystiform cells by SEM,which rank close and neatly.     

全钒液流电池隔膜在钒溶液中的性能

考察了Nafion、日-160、日-80、FYM(日本产Nafion膜)和均相膜5种离子交换膜的两个关键性能(渗透性和面电阻)及其影响因素,对均相膜的化学稳定性进行了初步研究,并对两种膜进行了改性。实验发现:均相膜的钒扩散系数最小,但面电阻较大,化学稳定性不好;用二乙烯苯(DVB)对均相膜改性,综合性能较好;减小电场可降低钒离子扩散,提高钒溶液中氢离子浓度可减小面电阻。     

Effect of Rare Earths on Corrosion Resisting Properties of Carbon-Manganese Clean Steels

Rareearthelementshavesignificantactionsinsteels ,includingwipingoffimpurityelements ,trans modifyinginclusions ,andimprovingmicrostructureetal,soaddingappropriaterareearthsintosteelscanef fectivelyimprovetheircorrosionresistingproper ties[1,2 ] .Todaypuri…     

新一代顺序式X射线荧光光谱仪——飞利浦PW2400型X射线荧光光谱仪

介绍了飞利浦ＰＷ２４００型新的Ｘ射线荧光光谱仪，它采用了多种新技术，包括脱Ｘ射线管（ＳＳＴ），直读光学定位传感器（ＤＯＰＳ）多道分析器（ＭＣＡ）及新的窗式软件。     

ZVF型调节阀中不同阀瓣型线对局部流阻的影响

调节阀中不同阀瓣型线构成的通道，其局部流阻是不一样的。通过应用ANSYS2软件对DN50mmZVF型调节阀几种阀瓣型线在不同开度下构成的通道结构模型进行计算，从而得出流阻系数与开度的关系，并通过比较得到最佳阀瓣型线。该方法有很好的工程应用价值。     

聚脲改性聚酰胺多胺环氧氯丙烷涂布抗水剂的研究

制备了高含固量，稳定性好的聚脲改性聚酰胺多胺环氧氯丙烷，通过实验研究了其作为涂布抗水剂的应用工艺及作用机理，分析了多种因素对产品性能和贮存稳定性的影响。