【摘 要】
：
本研究乃针对含高硼(≥10%,摩尔分数)之PrFeB纳米晶薄带之磁性能及相变化做一系列探讨.实验发现,以微量耐火元素(钛、锆、铌及钒))置换铁于PrFeB纳米晶薄带中可有效抑制亚稳
论文部分内容阅读
本研究乃针对含高硼(≥10%,摩尔分数)之PrFeB纳米晶薄带之磁性能及相变化做一系列探讨.实验发现,以微量耐火元素(钛、锆、铌及钒))置换铁于PrFeB纳米晶薄带中可有效抑制亚稳定相Pr2Fe23B3及Fe3B,而生成大量且细的Pr2Fe14B及α-Fe晶粒,进而大幅提升其磁性能.当合金成分为(Pr,Nd)9.5Fe78.5Ti2B10时有最佳磁性值,其Br=9.9 kG,iHc=8.0 kOe及(BH)maxx=18.7 MGOe.而最大矫顽磁力值iHc=13.2 kOe时(Br=8.8 kG及(BH)max=16.3 MGOe),则出现成分为Prg.5Fe78.5Ti2B10之合金薄带.此外,并对含碳之Pr2(Fe,Nb)23(B,C)3-(Pr7.14(Fe,Nb)82.14(B,C)10.72)及Pr2(Fe,Zr)23(B,C)3合金薄带作研究.结果显示,碳之添加可提高上述薄带之本质矫顽磁力,但对Pr2(Fe,Ti)23(B,C)而言,碳之置换则无改善薄带磁性的效果.
其他文献
Optimization of mapping rule of bit-interleaved Turbo coded modulation with 16 quadrature amplitude modulation (QAM) is investigated based on different impacts
Existing in-kernel distributed file systems cannot cope with the higher requirements in well-equipped cluster environments, especially when the system becomes l
Orthogonal Frequency Division Multiplexing(OFDM)is a kind of transmission techniques with high frequency efficiency,which will be widely used in next-generation
市场力是电力市场改革中日益令人关注的研究课题,发电商利用市场力抬高电价,牟取超额利润。这样既损害了用户的利益,也使资源不能合理配置,市场不能有效竞争。这有背于电力改
In order to reduce or eliminate the multiple access interference in code division multiple access (CDMA) systems, we need to design a set of spreading sequences
Rigorous modeling could improve the correctness and reduce cost in embedded real-time system development for models could be verified. Tools are needed for rigo
介绍了一种用于丰中子核研究的RIBLL终端大面积中子探测器阵列的研制 .利用Geant4软件包对该探测系统的中子探测效率、时间分辨和位置分布等进行了蒙特卡罗模拟 ,同时对探测
神经网络的数学算法可将样本的输入输出转变为非线性优化算法。工程机械由若干系统组成,其神经网络的故障诊断器由相应的故障分类器构成,利用判决规则进行故障判断。
The ne
A parametric method is developed to quantitatively represent the microstructure of 3D woven structures. Different binding patterns, such as angle interlock and
Based on a new special co-inner-outer factorization, a factorization approach for design fault detection observer for LSFDJ was proposed. It is a simple state-s