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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Investigation of magnetic properties, phase evolution, and microstructure of melt spun PrFeTiBC nanocomposites
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Investigation of magnetic properties, phase evolution, and microstructure of melt spun PrFeTiBC nanocomposites

机译：熔纺PrFeTiBC纳米复合材料的磁性，相变和微观结构的研究

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摘要

Microstructure, phase evolution, and magnetic properties of Pr-lean and B-excess Pr_9Fe_(bal.)Ti_xB_(11-y)C_y (x = 0 and 2.5; y = 0-11) ribbons have been investigated. Pr_9Fe_(bal.)Ti_xB_(11-y)C_y (Ti free) series ribbons, the effect of slight C addition not only forms the Pr_2Fe_(14)(B,C) phase but also refines the grain size, yielding an increase in the remanent magnetization (B_r), intrinsic coercivity (_iH_c) and energy product ((BH)_(max)). For Pr_9Fe_(bal.)Ti_(2.5)B_(11-y)C_y series ribbons, substitution of Ti suppresses the formation of metastable Pr_2Fe_(23)B_3 phase and ensures the existence of large amount magnetically hard Pr_2Fe_(14)B phase. However, the increase of C substitution in the Pr_9Fe_(bal.)Ti_(2.5)B_(11-y)C_y (y =0-11) ribbons degrades B_r, _iH_C, and (SH)_(max) monotonically. It arises from the increase of volume fraction of Pr_2Fe_(17)C and alpha-Fe phases, and the rapid decrease of 2:14:1 phase. The attractive properties of B_r = 9.7 kG, _iH_c = 7.8 kOe, (SH)_(max) = 13.1 MGOe and alpha = -0.130 percent/deg C, beta = -0.615 percent/deg C are obtained in Pr_9Fe_(bal.)B_(10.5)C_(0.5) nanocomposites, on the other hand, the optimal properties of B_r = 9.5 kG, _iH_C = 10.8kOe, (SH)_(max) = 17.8MGOe and alpha = -0.135 percent/deg C, beta = -0.576 percent/deg C are achieved in Pr_9Fe_(bal.)Ti_(2.5)B_(11) nanocomposites.
机译：研究了Pr-lean和B过量Pr_9Fe_（bal。）Ti_xB_（11-y）C_y（x = 0和2.5; y = 0-11）碳带的微观结构，相演变和磁性能。 Pr_9Fe_（bal。）Ti_xB_（11-y）C_y（无钛）系列碳带，少量添加C的效果不仅形成Pr_2Fe_（14）（B，C）相，而且细化了晶粒尺寸，从而增加了剩余磁化强度（B_r），固有矫顽力（_iH_c）和能量乘积（（BH）_（max））。对于Pr_9Fe_（bal。）Ti_（2.5）B_（11-y）C_y系列碳带，Ti的取代抑制了亚稳态Pr_2Fe_（23）B_3相的形成，并确保了存在大量的磁性硬Pr_2Fe_（14）B相。但是，Pr_9Fe_（bal。）Ti_（2.5）B_（11-y）C_y（y = 0-11）碳带中C取代的增加会单调降低B_r，_iH_C和（SH）_（max）。其起因于Pr_2Fe_（17）C和α-Fe相的体积分数增加，以及2：14：1相的快速减少。在Pr_9Fe_（bal。）中获得B_r = 9.7 kG，_iH_c = 7.8 kOe，（SH）_（max）= 13.1 MGOe和α= -0.130％/℃，β= -0.615％/℃的吸引人的特性。另一方面，B_（10.5）C_（0.5）纳米复合材料的最佳性能为B_r = 9.5 kG，_iH_C = 10.8kOe，（SH）_（max）= 17.8MGOe和alpha = -0.135％/ deg C，beta在Pr_9Fe_（bal。）Ti_（2.5）B_（11）纳米复合材料中可达到-0.576％/℃。

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