共查询到20条相似文献,搜索用时 140 毫秒
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概要论述了新型陶瓷材料应用及发展,探讨了传统陶瓷材料向现代功能陶瓷材料转变的过程的同时,还重点讨论了新型陶瓷材料在现代机械工业,特别是在动力机械、热能传递、加工工具及轴承等运动部件上的实际应用及发展趋势。 相似文献
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现代工程陶瓷以其优异的性能在阀门工业中得到了广泛的应用,陶瓷阀门必将产生巨大的社会经济效益。本文介绍了陶瓷材料在阀门中的各种应用形式及技术现状。 相似文献
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陶瓷密封型截止阀的密封性能研究 总被引:1,自引:0,他引:1
针对普通截止阀的密封缺陷,提出了用工程陶瓷材料制成密封件,并从密封机理上叙述了工程隐瓷型密型截止阀的密封特性,认为利用工程陶瓷材料制成阀门类密封件是可行的。 相似文献
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结构陶瓷具有高强度、耐高温和耐磨蚀等优点,作为摩擦学部件已得到广泛的应用。从陶瓷材料的显微结构讨论了陶瓷材料的摩擦磨损行为及机制,以促进正确设计和使用陶瓷材料作为摩擦学部件。 相似文献
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一种新型刀具材料——陶瓷—金属覆层刀具材料 总被引:1,自引:0,他引:1
通过在金属基体上覆层三元硼化物基陶瓷制备出的陶瓷—金属覆层刀具材料同时具有陶瓷材料硬度高、耐磨性好和金属材料强度高、韧性好、导热性好的性能优势 ,是一种极具发展潜力的新型刀具材料 相似文献
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Qingbin Liu Ming C. Leu Von L. Richards Stephen M. Schmitt 《The International Journal of Advanced Manufacturing Technology》2004,24(7-8):485-495
The dimensional accuracy and surface finish of ice patterns generated by rapid freeze prototyping were first investigated. The dimensional accuracy and surface finish of metal parts made by investment casting with ice patterns were then investigated and compared with those made by conventional investment casting with wax patterns. The selection of binder, ceramic powder, and catalyst material for ceramic slurries in the process of investment casting with ice patterns and the need for an interface agent to separate the ice pattern from the ceramic slurry in the mold making process are discussed. The parts used in the investigation included circular cylinders with vertical and slant walls and a turbine impeller. This revised version was published online in October 2004 with a correction to the issue number. 相似文献
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纯水液压元件中陶瓷涂层零件的腐蚀失效机理分析 总被引:7,自引:1,他引:6
陶瓷涂层零件用作纯水液压元件的摩擦副具有良好的耐磨和抗蚀性能,但也存在腐蚀失效问题。本文分析了陶瓷涂层零件在海水中的腐蚀失效现象,指出了其腐蚀失效机理是基体金属表面材料的缝隙腐蚀或者粘结层中特定相的选择性析出,基体金属表面材料的抗蚀特性和表面强化的方法是影响陶瓷涂层金属零件耐蚀性能的两个主要因素。 相似文献
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I. N. Karelin 《Journal of Friction and Wear》2010,31(3):214-227
The paper deals with the solution of a topical problem of selecting protective ceramic materials to improve the service life
of parts of gas-and-oil and other equipment that experience abrasive erosion. The available theoretical and experimental methods
of specifying protective materials are analyzed. The author discusses the potential of the energy concept of the abrasive
erosion process and uses this concept together with system approach methodology to propose new numerical characteristics.
The possibility of determining these characteristics for ceramic materials by the calculation-experimental method involving
a developed technique and device is shown. The availability of adequate numerical characteristics of the abrasive-containing
flow and the ceramic material forms the basis for selecting a ceramic material using the criterion of its minimal wear intensity
in the contaminated flow of a working fluid. 相似文献
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激光熔覆陶瓷涂层研究现状与展望 总被引:1,自引:0,他引:1
陶瓷材料具有高硬度、高熔点、高耐蚀等特性,常被应用于机械装备关键零部件的表面强化改性和再制造修复。随着装备服役工况日益苛刻,传统金属材料所制备的装备运动部件在服役过程中易于发生磨损、腐蚀、变形等失效,进而导致服役性能退化,严重时甚至引发装备恶性故障。激光熔覆作为一种高效的表面强化和再制造技术,在提升基材表面耐磨、耐蚀、耐热、抗高温氧化等性能方面具有重要应用前景。通过激光熔覆技术在零部件表面制备陶瓷涂层,对于延长关键零部件寿命、提高资源利用率、节约稀贵金属材料具有重要意义。首先按照陶瓷涂层的组织结构和成形机理对激光熔覆陶瓷涂层进行了分类介绍;然后结合激光熔覆制备陶瓷涂层的典型缺陷详细阐述了涂层质量优化的常用方法;而后综述了激光熔覆陶瓷涂层在提升零件耐腐蚀、耐磨损、耐高温性能和提高生物相容性等方面的应用情况;最后,总结了激光熔覆陶瓷涂层技术发展现状,并展望了激光熔覆陶瓷涂层技术的发展趋势。 相似文献
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Omotoyosi H. FAMODIMU Mark STANFORD Chike F. ODUOZA Lijuan ZHANG 《Frontiers of Mechanical Engineering》2018,13(4):520-527
Laser melting of aluminium alloy—AlSi10Mg has increasingly been used to create specialised products in various industrial applications, however, research on utilising laser melting of aluminium matrix composites in replacing specialised parts have been slow on the uptake. This has been attributed to the complexity of the laser melting process, metal/ceramic feedstock for the process and the reaction of the feedstock material to the laser. Thus, an understanding of the process, material microstructure and mechanical properties is important for its adoption as a manufacturing route of aluminium metal matrix composites. The effects of several parameters of the laser melting process on the mechanical blended composite were thus investigated in this research. This included single track formations of the matrix alloy and the composite alloyed with 5% and 10% respectively for their reaction to laser melting and the fabrication of density blocks to investigate the relative density and porosity over different scan speeds. The results from these experiments were utilised in determining a process window in fabricating near-fully dense parts. 相似文献
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等离子熔射成形技术在金属陶瓷复合材料的近净成形中具有明显的技术优势。通过金属陶瓷零件熔射近净成形实验,详细分析熔射工艺过程和工艺参数对成形件质量的影响。研究表明等离子熔射成形技术可快速制造金属陶瓷零件,实现成形与加工一体化,且工艺简单、成本低,是金属陶瓷复合材料成形技术中很有发展潜力的方法。 相似文献
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陶瓷磨削残余应力对表面性能的影响 总被引:6,自引:0,他引:6
陶瓷零件的磨削表面必然要附加一层残余压应力 ,其对零件的使用性能影响较大。本文主要针对陶瓷材料磨削表面残余应力对疲劳磨损和表面硬度的影响进行实验研究。试验结果表明 :与金属材料相比 ,Zr O2 陶瓷材料的磨削残余应力对零件的摩擦磨损性能的影响要小得多。磨削、研磨及加热三个试件组的磨损量随摩擦时间呈现一定的变化规律。残余拉应力在一定程度上加速陶瓷零件的磨损 ,残余压应力可适当减缓陶瓷零件的磨损 ,其数值变化对零件性能的影响很小。随着残余压应力值的增加 ,表面硬度值也在逐渐增加 ,当残余压应力增加到一定值后表面硬度值开始下降。 相似文献