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
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.
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.
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