PTFE复合材料的研究进展

概述了聚四氟乙烯基(PTFE)复合材料的发展现状,针对过滤和耐磨材料两大应用领域,重点介绍了纤维复合、无机粒子填充、织物增强及聚合物共混等复合材料的实现形式。指出了制约复合材料发展的共性关键问题-界面相容性,并对PTFE复合材料的发展前景作了展望。     

聚合物纳米复合材料的研究进展

综述了聚合物基纳米复合材料的概念、产生、分类、制备方法以及聚合物基纳米复合材料的性能及应用,对聚合物基纳米复合材料的应用前景作了简要地分析,并提出了发展方向。     

金属基混杂复合材料的研究进展

本文综述了金属基混杂复合材料的研究进展。着重介绍了各种金属基混杂复合材料的发展背景、组成、工艺方法和性能特点,并对其发展前景作了分析,认为纤维与颗粒混杂增强的金属基复合材料和树脂基复合材料与铝合金的超混杂复合材料是最具活力的品种。     

有机／无机纳米复合材料的研究进展

有机／无机纳米复合材料是一种集有机、无机纳米材料的诸多特性于一身的新型复合材料,正在成为一个新兴的极富生命力的研究领域,本文对有机／无机纳米复合材料的发展历程、制备方法及应用进行了综述,并对其今后的发展作了展望。     

碳/环氧复合材料缺口层合板拉-拉疲劳特性研究

一、前 言 复合材料结构和工艺的复杂性,使它对疲劳载荷的响应在本质上不同于金属材料。复合材料可能发生脱胶、分层、基体开裂、空隙增长、纤维断裂以及整体断裂等多种疲劳损伤形式,而且复合材料的损伤是由几种形式的损伤共同相互作用的综合结果,其疲劳损伤的发展缺乏规律性。 为了了解复合材料的疲劳特性,我们做了碳/环氧复合材料层合板的拉-拉疲劳试验研究,对多向复合材料层合板在循环拉-拉载荷作     

碳纤维复合材料与金属连接及接头力学性能测试

碳纤维复合材料因其强度高、质量轻、导热性能出众,在外空间和核工业等领域中的关键部件中得以应用.碳纤维复合材料与金属主要是通过螺栓、胶结、钎焊或扩散焊连接在一起.其中,在钎焊过程中,多数钎料在这类复合材料表面并不润湿,通常采用活性钎料,在高温和高真空的条件下进行;钎料的种类不同,钎焊接头的强度差异也很大.本文对碳纤维复合材料与金属铜、钛、铌、铝等金属的连接方法和相关研究进展作了总结,对其接头的力学性能测试方法作了介绍,并对该领域的研究方向发展做了展望.     

纳米颗粒及其聚合物复合材料的研究与应用

本文主要介绍了纳米颗粒的性能及其在聚合物纳米复合材料方面的应用,先后列举纳米二氧化硅、纳米碳酸钙、纳米蒙脱土、纳米二氧化钛和碳纳米管五种常用纳米颗粒,就其种类、性能、制备方法以及其在聚合物复合材料上的应用作了综述,并对纳米颗粒及其聚合物复合材料的发展作了展望。     

树脂基复合材料原位固化制造技术概述

随着树脂基复合材料应用领域的扩大和使用量的增加,发展树脂基复合材料自动化、低成本制造技术成为先进制造技术领域的研究热点.本文详细介绍了树脂基复合材料原位固化制造技术的概念、产生与意义,对目前国内外各种树脂基复合材料原位固化制造技术的研究作了综述；对比分析了用γ射线、X射线、热、微波、紫外光和电子束等固化方式进行原位固化...     

颗粒复合材料颗粒相／基体相界面结合强度

就颗粒复合材料相界面结合强度的定义、影响因素及其对颗粒复合材料力学性能的影响等方面作了综述,指出了目前研究中存在的问题,提出了颗粒复合材料相界面结合强度研究的方案。     

高强度高导电性形变铜基原位复合材料的研究进展

形变铜基原位复合材料是高强度高导电性铜合金的研究热点和发展方向之一,其突出的特点是具有超高的强度和良好的电导率。综述了铜基原位复合材料的研究现状,介绍了该类材料的制备工艺、组织演变、强化导电机理和性能特点,重点对其强化机理作了论述,并对该类材料的发展方向作了展望。     

An overview of mechanical properties and durability of glass-fibre reinforced recycled mixed plastic waste composites

In recent years, there has been an increasing interest in seeking the potential applications of recycled mixed plastic wastes in building and construction sectors to relieve the pressure on landfills. This paper presents the recent developments and applications of composite materials made from recycled mixed plastics and glass fibre. Some of the first uses for such composites are as an alternative to non-load bearing applications like park benches and picnic tables. With its inherent resistance to rot and insect attack, these composites can in fact be used as a replacement for chemically treated woods in various larger-scale outdoor applications such as railroad crossties and bridges. However, the properties of the structural components made from recycled mixed plastics are not well understood. Information on the behaviour of such composites under applied loading and at different environmental conditions such as elevated temperature and ultraviolet rays are crucial for the utilisation of recycled mixed plastic materials in construction. This paper presents an overview of the mechanical properties and durability of recycled mixed plastic waste composites. The paper identifies research needs critical in the effective design and utilisation of these composite materials in civil engineering and construction.     

Mechanical and thermal characteristics of high density polyethylene–fly ash Cenospheres composites

Fly ash Cenospheres was used as reinforcing filler in High density polyethylene (HDPE) to develop lightweight composites. Cenospheres are inert hollow silicate spheres. Cenospheres are a naturally occurring by-product of the burning process at coal-fired power plants, and they have most of the same properties as manufactured hollow-sphere products. Cenospheres are primarily used to reduce the weight of plastics, rubbers, resins, cements, etc. used extensively as filler lubricants in oil drilling operations under high heat and high stress conditions down the hole. Also used as oil well cementing, mud putty and similar applications. Cenospheres were first used in the United States as an extender for plastic compounds, as they are compatible with plastisols thermoplastics, Latex, Polyesters, Epoxies, Phenolic resins and urethanes. The compatibility of Cenospheres with special cements and adhesives coating and composites have been well identified. Cenospheres are widely used in a variety of products, including sports equipments, insulation, automobile bodies, marine craft bodies, paints, and fire and heat protection devices. Typically applied in gypsum board jointing compounds, veneering plasters, stuccos, sealants, coating and cast resins. Providing the advantages of reduces weight, increased filler loadings, better flow characteristics, less shrinkage and warping and reduces water absorption. In order to improve the interaction between the inorganic filler and the organic matrix, the Cenospheres were surface treated with silane coupling agent and HDPE-g-dibutyl maleate was used as compatibilizer. The tensile and thermal properties of the composites were measured according to ASTM methods. The results reveal that, both surface modification of Cenospheres accompanied by compatibilization led to the substantial improvement to mechanical properties and thermal stability of the composites.     

Investigation of flax fibre reinforced epoxy friction composites

The use of eco‐materials on the basis of natural fibre reinforced polymer composites has found its way to many applications. In the automobile sector, the use of such composites has long been established for applications in the car interior. The use of natural fibre reinforced composites for braking applications has however not been confirmed yet. In this study the use of flax fibres as a candidate reinforcement substitution for glass or even the carcinogenic asbestos fibres has been investigated. Typical frictional materials such as alumina, iron and brass particulates have been used together with graphite as a lubricant. Epoxy resin was used as the binding matrix. Results show frictional behaviours comparable with commercially available brake linings at acceptable wear rates.     

塑料对0－3型锆钛酸铅压电复合材料性能的影响

研究了不同塑料尼龙１０１０和Ｅ－２０环氧树脂与锆钛酸铅（ＰＺＴ）复合而成的压电复合材料的压电性能，结果表明，尼龙１０１０－ＰＺＴ压电复合材料比Ｅ－２０环氧树脂－ＰＺＴ具有较低的饱和极化电场和较短的饱和极化时间，而且前者比后者具有更高的压电常数。     

无机/有机纳米复合聚酯材料——技术开发和应用市场

层状硅酸盐经过有机化相容处理后,通过聚合插层法或熔体插层法将无机层状硅酸盐与聚酯复合,形成新的层状硅酸盐聚酯纳米复合材料。纳米聚酯的种类包括属于饱和聚酯的PET、PBT、PTT、PCT、PC、PLA及属于不饱和聚酯的各种配方。纳米聚酯材料在塑料、包装、纤维、农业等领域的诸多应用,如塑料啤酒瓶、PET工程塑料、抗茵纤维、回收再生料、纳米PC塑料、抗菌不饱和树脂制品等,使其具有巨大的开发应用价值。     

Mechanical property evaluation of natural fiber coir composite

The fiber which serves as a reinforcement in reinforced plastics may be synthetic or natural. Past studies show that only artificial fibers such as glass, carbon etc., have been used in fiber-reinforced plastics. Although glass and other synthetic fiber-reinforced plastics possess high specific strength, their fields of application are very limited because of their inherent higher cost of production. In this connection, an investigation has been carried out to make use of coir, a natural fiber abundantly available in India. Natural fibers are not only strong and lightweight but also relatively very cheap. In the present work, coir composites are developed and their mechanical properties are evaluated. Scanning electron micrographs obtained from fractured surfaces were used for a qualitative evaluation of the interfacial properties of coir/epoxy and compared with glass fiber/epoxy. These results indicate that coir can be used as a potential reinforcing material for making low load bearing thermoplastic composites.     

汽车轻量化技术的研究现状综述

近年来汽车行业的科技水平发展程度逐渐提高,汽车行业进入高速发展阶段,然而随之而来的环境和能源问题也日趋加重。轻量化技术变成了各个汽车企业提升市场竞争力的关键,作者根据近些年来汽车轻量化技术现状进行综述,主要介绍了包括轻量化材料(高强度钢、镁合金、铝合金、钛合金、塑料及复合材料)、现阶段应用于汽车制造的先进加工工艺(激光焊接技术、液压成形技术)以及发展逐步成熟、显著提高轻量化成果的结构优化(尺寸优化、形状优化、形貌优化、拓扑优化、多目标多学科优化)的使用现状以及对其发展趋势的探讨。     

工程塑料在汽车轻量化中的应用进展

结合工程塑料的广阔应用前景及在汽车轻量化方面的发展趋势,综述了工程塑料在汽车动力系统、汽车照明技术、汽车装饰件、汽车安全化方面的发展状况,并分析工程塑料对汽车未来轻量化发展的推动作用.     

Effect of heat treatment on strength and abrasive wear behaviour of Al6061-SiC<Subscript>p</Subscript> composites

In recent years, aluminum alloy based metal matrix composites (MMC) are gaining importance in several aerospace and automobile applications. Aluminum 6061 has been used as matrix material owing to its excellent mechanical properties coupled with good formability and its wide applications in industrial sector. Addition of SiC_p as reinforcement in Al6061 alloy system improves its hardness, tensile strength and wear resistance. In the present investigation Al6061-SiC_p composites was fabricated by liquid metallurgy route with percentages of SiC_p varying from 4 wt% to 10 wt% in steps of 2 wt%. The cast matrix alloy and its composites have been subjected to solutionizing treatment at a temperature of 530°C for 1 h followed by quenching in different media such as air, water and ice. The quenched samples are then subjected to both natural and artificial ageing. Microstructural studies have been carried out to understand the nature of structure. Mechanical properties such as microhardness, tensile strength, and abrasive wear tests have been conducted both on matrix Al6061 and Al6061-SiC_p composites before and after heat treatment. However, under identical heat treatment conditions, adopted Al6061-SiC_p composites exhibited better microhardness and tensile strength reduced wear loss when compared with Al matrix alloy.