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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2020, Vol. 48 
