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材料工程  2020, Vol. 48 Issue (8): 119-125    DOI: 10.11868/j.issn.1001-4381.2019.000402
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
Mo元素对LaFe11.5Si1.5磁制冷材料耐腐蚀性能及磁性能的影响
胡洁1, 董中奇2, 沈英明1, 王杨2, 杨俊雅1
1. 石家庄铁道大学 材料科学与工程学院, 石家庄 050043;
2. 河北工业职业技术学院 材料工程系, 石家庄 050091
Effect of Mo on corrosion resistance and magnetic property of LaFe11.5Si1.5 magnetic refrigeration materials
HU Jie1, DONG Zhong-qi2, SHEN Ying-ming1, WANG Yang2, YANG Jun-ya1
1. School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2. Department of Materials Engineering, Hebei College of Industry and Technology, Shijiazhuang 050091, China
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摘要 采用X射线衍射(XRD)、扫描电子显微镜(SEM)、电化学工作站、振动样品磁强计(VSM)研究Mo元素掺杂对LaFe11.5Si1.5磁制冷材料相组成、耐腐蚀性能和磁性能的影响。结果表明:随着Mo元素的加入,α-Fe相及富La相不断增多。Mo原子分布在NaZn13型结构的相(简称1:13相)及α-Fe相中,并未出现在富La相中。对耐腐蚀性能的研究表明,当Mo含量从x=0提高至x=0.2,LaFe11.5-xMoxSi1.5合金的腐蚀电位升高,腐蚀电流密度降低,说明热力学稳定性以及耐腐蚀性均提高。但是当Mo含量增加到x=0.3时,耐腐蚀性能下降。对磁性能的研究表明,LaFe11.5-xMoxSi1.5在0~3 T磁场变化下的最大磁熵变分别为18.51 J/(kg·K)(x=0),16.24 J/(kg·K)(x=0.1)和5.68 J/(kg·K)(x=0.2)。
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胡洁
董中奇
沈英明
王杨
杨俊雅
关键词 磁制冷材料La(Fe,Si)13耐腐蚀性能磁性能    
Abstract:The effect of Mo on phase formation, corrosion resistance and magnetic property of LaFe11.5Si1.5 magnetic refrigeration materials were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), electrochemical workstation and vibrating sample magnetometer (VSM). The results show that the amount of α-Fe phase and La-rich phase increases with the increase of Mo content. Mo is distributed in both NaZn13-type structure phase (1:13 phase for short) and α-Fe phase, but it does not appear in the La-rich phase. The studies on the corrosion resistance show that the corrosion potential increases and corrosion current density decreases with the increase of Mo content from x=0 to x=0.2, which indicate that the thermodynamic stability and corrosion resistance are improved. However, the corrosion resistance decreases while x increases to 0.3. The maximum magnetic entropy changes of LaFe11.5-xMoxSi1.5 under a magnetic field change of 0-3 T are about 18.51 J/(kg·K)(x=0),16.24 J/(kg·K)(x=0.1) and 5.68 J/(kg·K)(x=0.2), respectively.
Key wordsmagnetic refrigeration material    La(Fe,Si)13    corrosion resistance    magnetic property
收稿日期: 2019-04-27      出版日期: 2020-08-15
中图分类号:  TG146.4  
通讯作者: 胡洁(1985-),女,讲师,博士,研究方向为室温磁制冷材料,联系地址:河北省石家庄市北二环东路17号石家庄铁道大学春晖楼B座305(050043),E-mail:hujiecactus@163.com     E-mail: hujiecactus@163.com
引用本文:   
胡洁, 董中奇, 沈英明, 王杨, 杨俊雅. Mo元素对LaFe11.5Si1.5磁制冷材料耐腐蚀性能及磁性能的影响[J]. 材料工程, 2020, 48(8): 119-125.
HU Jie, DONG Zhong-qi, SHEN Ying-ming, WANG Yang, YANG Jun-ya. Effect of Mo on corrosion resistance and magnetic property of LaFe11.5Si1.5 magnetic refrigeration materials. Journal of Materials Engineering, 2020, 48(8): 119-125.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2019.000402      或      http://jme.biam.ac.cn/CN/Y2020/V48/I8/119
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