表面工程技术在导弹武器装备维修中的应用

本文主要介绍铝/F_(46),协合涂层新技术、复合电刷镀Ni—PTFE新工艺、DJB—823电接触保护剂及三防电子器件绝缘清漆在二炮导弹武器装备维修中的应用。     

Simultaneous removal of copper and zinc ions by low cost natural snail shell/hydroxyapatite/chitosan composite

In this work, the snail shell/hydroxyapatite/chitosan composite was prepared as adsorbent. The adsorption potential of the composite was studied for simultaneous sorption behavior of Zn(Ⅱ) and Cu(Ⅱ) ions in a batch system. Chitosan and hydroxyapatite(HAP) were extracted from shrimp shell and bone ash,respectively, so this is a low cost natural composite. To prepare the composite, chitosan was dissolved in acetic acid, then HAP and snail shell powders were added to the chitosan solution. The morphology and characterization of the composite was studied by SEM and EDX analysis. Atomic adsorption was used to measure the amount of the ions. Experimental parameters were optimized with Design Expert Software and five parameters such as the concentration of ions, p H, adsorbent amount and contact time were studied at room temperature. Optimized value for the parameters of Zn(Ⅱ) and Cu(Ⅱ) concentrations, p H, adsorbent dose, and contact time were 3.01 mg·L~(-1), 5.5, 0.02 g and 95 min, respectively. The adsorption isotherms for Zn(Ⅱ) and Cu(Ⅱ) showed Langmuir and Tempkin, respectively. Kinetic and equilibrium studies showed the experimental data of Zn(Ⅱ) and Cu(Ⅱ) ions were best described by the pseudo-second-order model. Studies on thermodynamic show the adsorption process were physical and spontaneous.     

塑料增韧增强技术现状分析及发展趋势

主要介绍了塑料增韧增强的技术研究现状,并例举了相关增韧增强材料的功能和特性,分析了今后塑料增韧增强发展的方向。     

聚乙烯对油田加热集输工艺的适用性

为明确非金属复合管聚乙烯内衬在油田加热输送工艺的适用性,借助反应釜、扫描电镜研究4731B聚乙烯挂片在温度50℃、压力0.1、4、6 MPa、采出原油与采出水介质中168 h内的渗透行为。研究发现,采出原油、采出水均可渗透进入聚乙烯使其溶胀、增重,采出原油引起的增重率大于采出水,最大为4.52%;聚乙烯表面产生裂纹,介质沿裂纹局部渗透,最大渗透深度达166.7μm;介质渗透使聚乙烯力学性能降低;采出原油引起的溶胀随压力增大而减小,采出水引起的溶胀在压力4 MPa时最严重;光氧老化对聚乙烯力学性能的影响显著高于介质渗透。结果表明,加热输送条件下,聚乙烯耐油田介质性能虽满足ISO 23936-1-2009要求,但裂纹现象与高裂纹扩展速率易导致非金属复合管泄漏失效。     

N,N−二甲基−二硫代甲酰胺丙磺酸钠对THPED体系化学镀铜的影响

研究了N,N?二甲基?二硫代甲酰胺丙磺酸钠(DPS)作为添加剂对以四羟丙基乙二胺(THPED)为单一配位剂的化学镀铜体系的沉积速率、镀层形貌和晶体结构的影响。结果发现,当DPS的质量浓度从0 mg/L增大到1.0 mg/L时,沉积速率从2.91μm/h提高到6.73μm/h,所得镀层结晶均匀、细致。线性扫描伏安测量结果表明,DPS是通过促进甲醛的阳极氧化来加速化学镀过程。本体系的Cu镀层主要呈面心立方多晶取向,DPS的添加会令晶面取向从(220)转变为(111)。     

化学镀镍内应力的研究

用于非金属电镀、电铸、化学镀、化学铸的现行许多化学镀镍工艺,总是在零件尖端部位发生崩裂,在镜面光洁的地方易起泡,这种难题至今未得到很好解决,这大大限制了化学镀镍的应用.针对这种情况,采用正交实验方法开发出一个低温、低内应力化学镀镍工艺,初步探讨了沉积层内应力与各工艺参数之间的关系,以及作为添加剂的糖精在化学沉积层中的作用机理,并对内应力和结合力的关系作了简介.实践证明了该工艺在短时间内能于多种复杂形状或镜面光亮的非金属表面上获得完整的化学镍沉积层.     

化学镀钴-磷基多元合金的研究现状

由于钴－磷基合金膜具有优异的磁性能和较高的耐蚀性，能有效的用于数字存储装置，已引起人们的极大关注。     

Pd／Ag纤维复合材料的制备工艺

用包套拉伸法和挤压法制备Ｐｄ／Ａｇ纤维复合材料，并通过金相和电子显微镜分别观察其微镜分别观察其微观结构，测试其性能，如电阻率，硬度，强度及接触电阻等。通过对比其工艺性及所得材料的微观结构和性能，认为挤压法优于包套拉伸法。此种Ｐｄ／Ａｇ纤维复合材料适合Ｐｄ／Ａｇ型复合铆钉和生产复铜铆钉。     

红外测温技术在离心复合铸造轧辊生产上的应用

本文分析了离心复合铸造轧辊生产过程中离心机停机温度和时间对轧辊质量的影响 ,提出了用先进的红外测温技术来预报停机温度和时间 ,以实现微机监控适时停机 ,保证轧辊内外层熔合良好 ;同时指出了红外测温技术在离心复合铸造轧辊生产上的应用前景