【摘 要】
：
Nd12.3Fe81.7-xGaxB6.0 (x =0-1.8) ribbons were prepared by melt spinning at 22 m/s and subsequent annealing treatment.The influences of Ga addition and annealing
【机 构】
：
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing
论文部分内容阅读
Nd12.3Fe81.7-xGaxB6.0 (x =0-1.8) ribbons were prepared by melt spinning at 22 m/s and subsequent annealing treatment.The influences of Ga addition and annealing conditions on the magnetic properties and microstructure of the nanocrystalline alloys were systematically investigated.After being annealed at 620℃ for 20 min,the Jr and Hci increased from 0.85 T and 582.6 kA/m for Ga-free sample to 0.97 T and 734.6 kA/m for the x =0.9 sample,respectively.The (BH)max for the x =0.9 sample increased by about 40％ from 96.3 to 135.5 kJ/m3 compared with that of the Ga-free one.The significant improvement of magnetic properties originated from the refmement of grains in the samples by introducing Ga,which led to a stronger exchange coupling between the neighboring grains in comparison with that in Ga-free samples.The microstructure and magnetic properties of the samples depended strongly on annealing parameters,while the sensitivity of microstructure to annealing conditions could be significantly suppressed by the addition of Ga element.
其他文献
[目的]筛选适宜在江西省婺源县栽培的水稻品种。[方法]在同一自然条件和栽培条件下栽培20个水稻新品种,对比各种生理性能和产量构成因素,从中发现优势品种。[结果]排名前3的
自古希腊以来,通过“视觉”的观看就作为对真理和知识的追求的一种通达方式,柏拉图的idea原意为“观看”及“认识”,具有视觉的含义,由此奠基的以概念、逻辑为线索的西方哲学
请下载后查看，本文暂不支持在线获取查看简介。
Please download to view, this article does not support online access to view profile.
文化伦理要在文化领域内寻求伦理的正确引导，以期达到一种仁爱和平与文化繁荣的世界文化图景。文化伦理的研究要具备两种视角:从文化与伦理关系的视角来看，文化是伦理的基础，伦
严复在甲午战败，国家、民族危亡之际，以“译著”《天演论》的方式引进了西方进化论学说，试图通过“物竞天择，适者生存”的观念，唤起人们的竞争意识，激发国人爱国保种、救亡图存的精
本文报告用电镜观察108例正常人血小板形态的变化, 其平均值圆型为0.85％,树突型为59.9％,扩大型为25.8％,聚集型为14.13％。正常人血小板聚集型比较恒定。血小板聚集型的正常范围是2
针对火花等离子体放电法制得粉末中的氧含量高的现状,对高温合金粉末的还原过程进行了探索性研究。结果表明:火花等离子体放电法制得的氧含量较高的镍基高温合金粉末使用CaH2
寒地水稻的生育性状、产量构成因素等方面都受栽培因子的影响.扩大穴距, 进行稀植栽培,会减少单位面积穗数,但可显著增加每穗粒数.移栽密度是获得高产的主要因素,其次是施肥
1. 弘一书法的空间意象来历的假设以及影响 近百年来对于弘一法师的关注和研究持续不断，其独特的“佛书”成为了书法中特征性符号。但是，对于这样独特的书法风格到底如何形成？业界似乎并未有确切的定论，大多从他的修佛角度去解释。不容置疑，思想上的转变影响艺术观的转变，艺术观的转变直接影响艺术风格的形成，这一点在下面会具体阐述。但本文着重在空间意象上分析了其特点，也便从空间意象的角度去发现弘一书法独特空间
清代道光年间，陈众喜所撰《众喜宝卷》，不仅完整地记录了长生教创立者汪长生的宗教生涯以及长生教的渊源、宗旨和教义，而且还在文本上栏部分汇集了众多与长生教相关的儒、释、道