通过熔体快淬方法制备了LaFe11.5Si1.Cx(x=0,0.1,0.2,0.3)系合金的快淬条带.采用X射线衍射分析仪、振动样品磁强计研究了C掺杂对La-Fe-Si合金在凝固过程以及随后热处理过程中的NaZn13型相形成及磁热性能的影响.结果表明:适量的C掺杂有利于凝固过程中NaZn13立方结构型的La(Fe,Si)13相的形成;C掺杂能有效地提高La(Fe,Si)13相的居里温度,当C含量由0增加到0.3时,合金的居里温度由210 K升高到262K.合金居里温度的升高是由于掺杂的C原子占据了La(Fe,Si)13相中的间隙位置,使La(Fe,Si)13相晶格膨胀,Fe-Fe原子间铁磁交互作用增强.当C掺杂含量为0.2时,La-Fe-Si-C合金在1273K热处理2h时获得了最佳综合磁热性能,其居里温度(Tc)为255 K,最大等温磁熵变(ASM)为9.45 J/(kg·K)(1.5 T).
参考文献
| [1] | Jian Liu;Maria Krautz;Konstantin Skokov.Systematic study of the microstructure, entropy change and adiabatic temperature change in optimized La-Fe-Si alloys[J].Acta materialia,20119(9):3602-3611. |
| [2] | Prabahar, K.;Raj Kumar, D.M.;Manivel Raja, M.;Chandrasekaran, V..Phase analysis and magnetocaloric properties of Zr substituted Gd-Si-Ge alloys[J].Journal of Magnetism and Magnetic Materials,201113(13):1755-1759. |
| [3] | H. Wada;Y. Tanabe.Giant magnetocaloric effect of MnAs_(1-x)Sb_(x)[J].Applied physics letters,200120(20):3302-3304. |
| [4] | 肖素芬;陈云贵;管登高;杨涛;涂铭旌.Thermodynamical Evaluation on Magnetocaloric Effect of Magnetic Refrigerating Materials Near Room Temperature[J].稀土学报(英文版),2003(6):648-653. |
| [5] | Zhou, Chen;Pinkerton, Frederick E.;Herbst, J. F..High Curie temperature of Ce-Fe-Si compounds with ThMn12 structure[J].Scripta materialia,2015:66-69. |
| [6] | 谢鲲;宋晓平;吕伟鹏;祝要民;孙占波.熔体快淬LaFe11.5Si1.5的巨大磁熵变[J].稀有金属材料与工程,2005(12):1909-1912. |
| [7] | Zhang, Zhongtian;He, Chun;Zhang, Mingxiao;Liu, Jian.Influence of extra La and annealing temperature on microstructure and magnetocaloric properties of La-Fe-Co-Si alloys[J].Physica, B. Condensed Matter,2015:167-170. |
| [8] | Chen, X.;Chen, Y.;Tang, Y..The effect of different temperature annealing on phase relation of LaFe_(11.5)Si_(1.5) and the magnetocaloric effects of La_(0.8)Ce_(0.2)Fe_(11.5-x)Co_xSi_(1.5) alloys[J].Journal of Magnetism and Magnetic Materials,201124(24):3177-3183. |
| [9] | Hu FX;Gao J;Qian XL;Ilyn M;Tishin AM;Sun JR;Shen BG.Magnetocaloric effect in itinerant electron metamagnetic systems La(Fe1-xCox)(11.9)Si-1.1 - art. no. 10M303[J].Journal of Applied Physics,200510(10):M303-0. |
| [10] | Chen YF.;Wang F.;Shen BG.;Sun JR.;Wang GJ.;Hu FX.;Cheng ZH.;Zhu T..Effects of carbon on magnetic properties and magnetic entropy change of the LaFe11.5Si1.5 compound[J].Journal of Applied Physics,200310 Pt.2(10 Pt.2):6981-6983. |
| [11] | LI Junqin;LIU Fusheng;AO Weiqin;ZHUANG Yinghong;ZHOU Kaiwen.Influence of carbon on the giant magnetocaloric effect of LaFe11.7Si1.3[J].稀有金属（英文版）,2006(05):556-561. |
| [12] | FU Song;LONG Yi;SUN Wei;YI Xueping;CHANG Yongqin;YE Rongchang;YANG Kang.Influence of silicon and carbon elements on formation of 1∶13 phase and microstructure in LaFe13-ySiy compounds[J].稀土学报（英文版）,2012(12):1225-1227. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%