共查询到16条相似文献,搜索用时 93 毫秒
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应用急冷技术制成非晶态合金薄带的研究工作,目前在国内发展较快。随着产品需求量的增加,新工艺、装备、技术研究必须由实验室走向工业生产。本文介绍50kg级非晶薄带制取装置。该设备设计结构独特,技术先进,是目前我国容易较大、功能较全的非晶薄带制取装置之一。在该装置上已获得Fe基和FeNi基非晶合金宽带,产品性能良好。 相似文献
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根据用原子力显微镜对在不同温度下晶化的Fe基非晶合金薄带三维介观结构的观察,结合X射线衍射、Mssbauer谱等前人已有的实验结果并在目前已有的理论研究基础上,对Fe基非晶合金薄带在不同温度下的晶化过程进行了系统的分析、研究,提出了两种Nb-B框架介观结构、团聚相和单位体积纳米晶粒平均数等新概念,建立了Fe基纳米晶合金的晶化机理假说,提出了描述Fe基非晶合金晶化过程的介观织构模型.这个模型能够演化成二相结构模型和三相互套结构模型,还可以合理地解释现有的实验结果以及500—600℃退火中Fe基纳米晶巨磁阻
关键词:
Fe基纳米晶合金
晶化机理
两种Nb-B框架介观结构
团聚相 相似文献
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具有年产能力10000-25000吨非晶带材的美国联合公司,是当今世界上最大的非晶材料生产企业.1984年生产了100余吨非晶带材,产值达到900万美元,其中磁性材料占90%,用于钎焊的薄带占10稀.两类材料的产值相当,即钎焊薄带的平均价格,相当于非晶态磁性材料平均价格的九倍,具有较大的经济价值,在非晶态材料工厂生产中占有相当重要的经济地位. 焊接工艺广泛应用于微电子工业、机械制造业和宇航工业.除一般使用的熔化焊接外,钎焊随着现代工业的发展也得到迅速的发展.钎焊是将熔点比母材低的钎焊料加热,在母材不熔化的情况下,钎焊料熔化并润湿和填充两… 相似文献
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根据爆炸焊接理论,综合分析了相关爆炸焊接参数的计算方法,利用Visual C++语言编制了爆炸焊接参数计算机辅助设计程序,该程序采用菜单和视图形式对输入、输出命令结果进行操作,方便直观。与有关实验结果的对比表明,计算所给出的焊接窗口及最佳焊接参数具有很高的准确度。爆炸焊接CAD方法对于减少实验次数,摆脱经验设计方法,选择最佳焊接参数将是非常有用的工具。 相似文献
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W.D. Liu K.X. Liu Q.Y. Chen J.T. Wang H.H. Yan X.J. Li 《Applied Surface Science》2009,255(23):9343-9347
Using an adjusted explosive welding technique, an aluminum plate has been coated by a Fe-based metallic glass foil in this work. Scanning electronic micrographs reveal a defect-free metallurgical bonding between the Fe-based metallic glass foil and the aluminum plate. Experimental evidence indicates that the Fe-based metallic glass foil almost retains its amorphous state and mechanical properties after the explosive welding process. Additionally, the detailed explosive welding process has been simulated by a self-developed hydro-code and the bonding mechanism has been investigated by numerical analysis. The successful welding between the Fe-based metallic glass foil and the aluminum plate provides a new way to obtain amorphous coating on general metal substrates. 相似文献
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Atomic diffusion across NisoTiso-Cu explosive welding interface: Diffusion layer thickness and atomic concentration distribution 下载免费PDF全文
Molecular dynamics simulations are carried out to study atomic diffusion in the explosive welding process of NisoTis0-Cu (at.%). By using a hybrid method which combines molecular dynamics simulation and classical diffusion the- ory, the thickness of the diffusion layer and the atomic concentration distribution across the welding interface are obtained. The results indicate that the concentration distribution curves at different times have a geometric similarity. According to the geometric similarity, the atomic concentration distribution at any time in explosive welding can be calculated. NisoTis0- Cu explosive welding and scanning electron microscope experiments are done to verify the results. The simulation results and the experimental results are in good agreement. 相似文献
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M. Laridjani R. Krishnan E. Okoniewska Pszczołkowska M. Dancygier J. F. Sadoc 《Applied Physics A: Materials Science & Processing》1984,34(2):111-115
Ductile amorphous foils of Fe80B20 have been sputter-deposited. We report here the results of structural and magnetic studies on these samples. Structural analysis shows slight differences between amorphous foils and ribbons. From the high-field measurements (H<15 T) the magnetic moment of Fe is estimated as 2.1±0.02 at 4.2 K in agreement with the value reported for ribbons. However, the magnetization is less temperature dependent in the foil, as compared to the ribbon. This result would indicate a lesser fluctuation in the exchange integralJ and hence lesser variations in the local environment of Fe. Finally the thermal stability is shown to be higher in the foils. It is suggested that sputtering technique could be used to prepare amorphous foils of large area for certain applications. 相似文献