共查询到20条相似文献,搜索用时 144 毫秒
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国外粉末冶金减摩材料的现状 总被引:3,自引:0,他引:3
概述了国外烧结减摩材料的研究现状,介绍了铜、铁和铝、轻金属钛以及易熔、高温、难熔金属基烧结减摩材料的性能与应用,简述了烧结减摩材料的新动向。 相似文献
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梯度功能材料的研究与新动向 总被引:1,自引:0,他引:1
介绍了一种新型功能材料一梯度功能材料,并着重介绍了国内外在金属-陶瓷系梯度材料的设计,制备工艺与性能评价方面的研究现状及其发展新动向。 相似文献
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粉末冶金摩擦材料及对偶材料支承钢背镀层的研究 总被引:2,自引:0,他引:2
研究了粉末冶金摩擦材料及对偶材料支承钢背镀层的热疲劳行为。结果表明,在反复急冷急热后,烧结对偶材料,采用镀铜再镀镍的钢背,在镀层处产生穿透性裂纹;采用镀镍的钢背,在镀层处产生非穿透性裂纹,裂纹随镀层厚度的增加增减少。烧结摩擦材料,无论是采用镀镍还是镀铜再镀镍的钢背都没有镀层处发现热疲劳裂纹。 相似文献
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锑在摩擦润滑,半导体材料中的应用 总被引:1,自引:0,他引:1
尚殿英 《有色金属(冶炼部分)》1991,(6):39-41,28
本文重点介绍锑的应用新领域,如用于摩擦材料、润滑材料、半导体材料、玻璃、电子工业用陶瓷等等。 相似文献
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高性能航空铝合金结构材料的动态研究 总被引:3,自引:0,他引:3
随着航空工业的发展,对航空铝合金材料性能的性能提出了更高的要求,本文分析研究了高性能航空铝合金结构材料的动态和发展趋势。调整合金的化学成分、降低杂质元素含量、改进材料制备、加工和热处理工艺是提高航空铝合金性能的主要手段,而发展超高强铝合金、高强高韧铝合金、低密高强高刚Al-Li合金、高强耐热铝合金、高强超塑性性铝合金和铝基复合材料等是发展航空铝合金结构材料的主要目标。 相似文献
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王颖 《Canadian Metallurgical Quarterly》2011,(5)
施工材料的质量是工程质量优劣的关健,因此施工材料的管理也尤为重要.本文从材料的采集、进厂检验等各个环节分析了加强材料管理的措施. 相似文献
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Rare earth compounds as modifiers used widely in modern friction materials can enhance the interracial binding of constituents of materials and improve the comprehensive properties of materials evidently. However, there are still few reports on application of rare earth in automotive friction materials. In order to study the effect mechanism of rare earths in friction materials, a rare earth compound was selected as additive and the effects of materials doped with or without rare earth on friction and wear properties of materials were studied. The microstructure and worn surface morphology were observed by scanning electron microscopy and the macro performance was discussed. Worn surface element constitution of materials was analyzed by energy dispersive spectroscopy. Effect mechanism of rare earths on friction and wear behaviors of friction materials were discussed. The results show that doping rare earths in friction materials can stabilize friction Coefficient, lower the wear rate of materials and increase the impact strength of materials. The flexibility and fracture resistance of materials is greatly improved. Worn surface of materials doped with rare earth is compact and the surface adhesion is greatly enhanced. 相似文献
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The tribological properties of materials were studied under conditions which model the collective and individual effects of outer space factors (vacuum, cryogenic temperatures, solar electromagnetic radiation). The behavior of aerospace materials (structural materials, self-lubricating composite materials, antifrictional solid lubricant coatings, wear-resistant coatings, etc.) were investigated. An approach to the design of materials for friction units is proposed, based on the concept that the materials of a friction pair are a complex self-organizing system. This made it possible to substantially expand the range of application of materials and coatings, and aided in the creation of new antifriction materials with pre-determined properties. 相似文献
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钨基复合材料具有密度高、熔点高、强度高、热膨胀系数小、热导率高、抗辐射能力强、耐腐蚀性强等优点,在电子信息、机械加工、航天航空、国防军工和核工业等领域可广泛用作穿破甲材料、电子封装材料、电极材料以及核辐射屏蔽材料等。采用传统方法制备的钨基复合材料由于晶粒粗大、组织均匀性差、性能低或致密度低等缺陷,已经难以满足尖端技术领域的发展需要。采用纳米复合技术制备的细晶钨基复合材料具有致密度高、组织细小且均匀、性能好等优点,成为钨基复合材料发展的重要方向。概述了高性能细晶钨基复合材料的制备关键技术与开发应用,并对高性能细晶钨基复合材料的应用前景作出了展望。 相似文献
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R Strang CJ Whitters D Brown RL Clarke RV Curtis PV Hatton AJ Ireland CH Lloyd JF McCabe JW Nicholson SN Scrimgeour JC Setcos M Sherriff R van Noort DC Watts D Woods 《Canadian Metallurgical Quarterly》1998,26(4):273-291
This critical review of the published literature on dental materials for the year 1996 has been compiled by the Dental Materials Panel of the UK. It continues the series of annual reviews started in 1973 and published in the Journal of Dentistry. Emphasis has been placed upon publications which report upon the materials science or clinical performance of the materials. The review has been divided by accepted materials classifications (fissure sealants, glass polyalkenoate cements, dentine bonding, dental amalgam, endodontic materials, casting alloys, resin-bonded bridges and ceramo-metallic restorations, ceramics, denture base resins and soft lining materials, impression materials, implants materials, orthodontic materials, biomechanics and image processing, resin composites and casting investment materials and waxes). Three hundred and thirteen articles have been reviewed. 相似文献
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简述了室温磁制冷材料的发展历史和纳米技术,概述了磁制冷材料研究的重点。总结了室温磁制冷工质材料具有优良性能的标准,并且给出了从微观、唯象和纳米方面研究室温磁制冷材料的新思路。介绍了纳米技术在室温磁制冷材料研究中的应用,重点讲述了纳米化对室温磁制冷材料的影响,预测了磁制冷材料的发展趋势。 相似文献
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以石墨烯为代表的二维材料因其厚度尺寸和层状结构特点,表现出许多独特的物理化学性质,比如导电率高、化学性质稳定以及比表面积大等特点,在环境、材料、能源和催化领域具有广泛的应用前景。而二维材料与半导体复合,不仅可以拥有单个组分的优势,而且每种组分之间的相互作用还可能会引起本征性能的协同增强,因此二维材料-半导体复合光催化剂受到广泛的关注。文中首先介绍了二维材料的分类,包括石墨烯基二维材料和类石墨烯二维材料(六方氮化硼、过渡金属硫族化物、石墨相氮化碳、黑磷、第Ⅳ主族类石墨稀材料、金属有机骨架化合物和共价有机骨架化合物、层状双氢氧化物)。其次对二维材料和半导体-二维材料复合光催化剂的制备进行总结,重点介绍二维材料的“自上而下”和“自下而上”制备策略。最后从光催化降解有机污染物和光解水制氢对二维材料的光催化应用进行综述。基于二维材料光催化的研究现状和进展,进而对二维材料在光催化领域的前景进行展望,提高其实际应用价值。 相似文献
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材料研究和发展的瞻望 总被引:6,自引:0,他引:6
徐祖耀 《有色金属材料与工程》1999,20(2):49-50
简介材料研究和应用的原则和趋势。指出,特殊性能水泥、“超级钢”、形状记忆材料、生物材料、高阻尼材料、纳米材料和薄膜材料将是下世纪材料发展的热点 相似文献
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从物质激励的局限性和激励实践等方面分析了非物质激励的意义,在此基础上提出了如何有效处理物质激励与非物质激励关系等问题。 相似文献