聚甲基丙烯酸甲酯-氧化锆复合材料的制备

将氧化锆纳米粉体冷等静压成型,经部分烧结制备成具有多孔网状结构的部分烧结体,然后经真空浸渍,将预聚甲基丙烯酸甲酯渗透入部分烧结体的开孔中,原位聚合,制备出聚甲基丙烯酸甲酯—氧化锆有机—无机复合材料。结果表明:预聚甲基丙烯酸甲酯经真空浸渍能完全浸入部分烧结陶瓷的开孔中并固化。当部分烧结体相对密度为63%~82%时,复合材料的弯曲强度为154~287MPa、断裂韧性为3.68~4.81MPa.m1/2;与部分烧结体比较,有明显提高。该复合材料经牙科CAD/CAM系统切削加工,可制作牙科修复体。     

圆柱形微带天线的复合材料设计

本文介绍了满足微带天线使用温度要求的聚合物基复合材料设计的方法与过程。按照这种方法,设计并制造了一批微带天线产品,经高低温测试,证明都符合设计要求。     

一种新型结构吸波材料的制备

介绍了阻抗匹配设计原理。自制了三种导电纤维,分别织成正交平纹布,通过优化设计,采用简单层式结构,以酚醛为基体,制备出接近实用水平的多层结构吸波材料。该材料厚3.2mm,密度1.38g/cm3,面密度4.42kg/m2;在8.4GHz～18GHz反射率小于-10dB;弯曲强度173MPa,弯曲模量12.5GPa。     

微型计算机在复合材料强度准则研究中的应用

文中论述了运用微型计算机(IBM-PC)进行复合材料强度准则研究的方法,包括强度包络线绘制、双向加载数据采集及实验数据处理等,同时还研究了如何确定双向试验中的破坏载荷值,并在分析实例中提供了较详细的数据。     

球磨时间对纳米SiO_2/Cu复合材料摩擦学性能的影响

采用球磨法与热压烧结工艺制备了添加w（n-SiO2）=1.0%的铜基纳米复合材料。通过球盘式摩擦磨损试验机测试了复合材料的摩擦磨损性能,采用排水法和场发射扫描电镜（FSEM）研究了复合材料的致密度、显微组织和磨损形貌。结果表明：球磨可提高复合材料的致密度,改善n-SiO2在铜基体中的分散均匀性;随球磨时间的增加,复合材料的动摩擦因数和磨损量先减小后增加,球磨10 h复合材料具有较低的摩擦因数和磨损量,磨损机理主要为磨料磨损。     

Reaction characteristic of PTFE/Al/Cu/Pb composites and application in shaped charge liner

In this paper, the reaction characteristic and its application in shaped charge warhead of a novel reactive material, which introduced copper (Cu) and plumbum (Pb) into traditional polytetrafluoroethylene/aluminum (PTFE/Al), are studied. The thermal analysis and chemical reaction behavior of the PTFE/Al/Cu/Pb mixture are investigated by Differential Scanning Calorimetry (DSC),Thermo-gravimetry (TG), and X-ray Diffraction (XRD) techniques. Then, the shaped charge liners with PTFE/Al/Cu/Pb reactive materials are fabricated, and the X-ray experiments show that they could form reactive jets with excellent performance under the detonation effects of the shaped charge. Based on that, the penetration experiments of shaped charge with PTFE/Al/Cu/Pb reactive liner against steel plates are carried out, and the results demonstrate that the PTFE/Al/Cu/Pb reactive jets could produce a deeper penetration depth compared to the traditional PTFE/Al reactive jets. Meanwhile, the PTFE/Al/Cu/Pb reactive jets also show significant inner-blast effects, leading to dramatically cracking or fragmentation behavior of the penetrated steel plates. This new PTFE/Al/Cu/Pb reactive liner shaped charge presents enhanced penetration behavior for steel targets that incorporates the penetration capability of a high-density and ductility jet, and the chemical energy release of PTFE-matrix reactive materials.     

提升装备物资采购保障能力的策略设计

装备物资采购关系到装备保障职能的充分发挥和作战效能发挥能力的积累,其采购保障过程涉及极其复杂的技术问题和管理问题。采购保障策略是开展采购和管理项目所确定的思路和实现途径,完善的采购保障策略设计对于重大的装备物资采购项目的成败具有举足轻重的作用。本文从军队装备物资采购的基本内涵与特点入手,结合工作实践和调查研究,从采购信息运用、流程管控、权责修订、法规约束和需求预测等业务管理层面进行分析,阐述了当前装备物资采购的发展现状,提出了提升装备物资采购保障能力的策略设计,以期实现采购组织、流程和系统的整体优化,为装备物资采购改革中相关措施的修订与完善提供新思路和新方法。     

Dynamic parameters of multi-cabin protective structure subjected to low-impact load – Numerical and experimental investigations

The dynamic response of a multi-cabin protective structure subjected to impact load directly affects the protective performance of materials; thus, studying the dynamic response and communication law of wave effect of the load plays an important role in the prediction of protective performance. In this study, the protection experiments of box-structure under air- and/or water-medium are conducted, the dynamic response of the structure subjected to low-impact load is analyzed, and the corresponding numerical simulations are analyzed using the theory of finite element method (FEM). Combined with experimental and FEM simulations, the shock strain distribution, acceleration attenuation, and signal energy in defensive materials are determined. Based on the results, the metal structure exhibits good absorption characteristics for shock vibration. Using the experimental data, we also show that the attenuation of shock wave in water medium should be significantly better than that in air medium, and the protective structure should be designed for a combination of water and air mediums. Meanwhile, the numerical simulation can provide a quantitative analysis process for dynamic analysis of defensive materials.     

应急物流保障与军地物流一体化研究

应急物流与军事物流都是在特殊条件下发生的物流活动,研究应急物流与军地物流一体化对于促进军事物流的发展具有重要意义.简述了应急物流的基本问题,分析了实现应急物流保障的基本条件:需要完善的应急法律体系、功能健全的应急指挥机构以及高效可靠的应急物流保障平台,阐明了军地物流一体化与应急物流的区别、军地物流一体化的重要作用,并对军地物流一体化下的应急物流保障模式进行了研究.     

Ni-Co-P／导电聚苯胺复合材料电磁和红外性能

采用化学镀对高氯酸掺杂聚苯胺（PANI/HClO4）粉体进行Ni-Co-P合金化改性,改性材料磁损耗因子得到提高。进行红外光谱分析,PANI/HClO4在3-5μm和8-14μm 2个大气窗口没有强吸收峰,具有雷达红外隐身兼容特性。