NiCrAlY薄膜对Sm<sub>2</sub>Co<sub>17</sub>磁体高温抗氧化性的影响

doi:10.11902/1005.4537.2014.055

中国腐蚀与防护学报

2015, Vol. 35

Issue (2): 183-188 DOI: 10.11902/1005.4537.2014.055

本期目录 | 过刊浏览

NiCrAlY薄膜对Sm₂Co₁₇磁体高温抗氧化性的影响

晏敏胜^1,², 何进^1,², 冒守栋², 杨丽景², 聂霞², 宋振纶²(

), 詹肇麟¹(

)

1. 昆明理工大学材料科学与工程学院昆明 650093
2. 中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室宁波 315201

Effect of NiCrAlY Coating on Oxidation Resistance of Sm₂Co₁₇ Magnets at High Temperatures

YAN Minsheng^1,², HE Jin^1,², MAO Shoudong², YANG Lijing², NIE Xia², SONG Zhenlun²(

), ZHAN Zhaolin¹(

)

1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2. Key Laboratory of Marine New Materials and Related Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

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摘要:

采用直流磁控溅射方法在Sm₂Co₁₇磁体表面制备NiCrAlY薄膜,分别探讨了NiCrAlY薄膜防护的Sm₂Co₁₇ (NiCrAlY/ Sm₂Co₁₇) 磁体在500,600和700 ℃空气中的氧化行为,测试了磁体的氧化增重和磁性能,并用SEM,EDS和XRD对薄膜的微观形貌、化学成分和相组成进行表征。结果表明,NiCrAlY薄膜在600 ℃以下可明显减缓O向Sm₂Co₁₇基体的扩散速率,提高Sm₂Co₁₇磁体的抗氧化性；当氧化温度升高到700 ℃,NiCrAlY薄膜的防护效果有所下降。在高温氧化过程中,NiCrAlY薄膜选择性氧化形成富Al₂O₃的致密氧化膜,可提升薄膜的高温抗氧化性能。

关键词 ： NiCrAlY薄膜, Sm₂Co₁₇磁体, 氧化, 磁性能, 磁控溅射

Abstract：

Air oxidation behavior of Sm₂Co₁₇ magnets coated with magnetron sputtered NiCrAlY coating was studied at 500, 600 and 700 ℃ in terms of variations of mass gains and magnetic properties. Microstructures, chemical composition, and phase constitution of the coating were analyzed by using scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results show that the NiCrAlY coating can improve the oxidation resistance of Sm₂Co₁₇magnets in air at 500 and 600 ℃, and its protectiveness declined with the increase of temperature up to 700 ℃. During the oxidation process, the Al atoms moved to the surface and combined with the oxygen atoms to form an oxide film on the surface of NiCrAlY coating, which can effectively maintain the oxidation resistance of NiCrAlY coating.

Key words： NiCrAlY coating Sm₂Co₁₇ magnet oxidation magnetic property magnetron sputtering

收稿日期: 2014-04-01

ZTFLH:

TB304

基金资助:国家科技支撑计划项目 (2012BAE02B01),浙江省自然科学基金项目 (Q14E010014)和宁波市自然基金项目 (2012A610053) 资助

作者简介: null

晏敏胜，男，1988年生，硕士生

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引用本文:

晏敏胜, 何进, 冒守栋, 杨丽景, 聂霞, 宋振纶, 詹肇麟. NiCrAlY薄膜对Sm₂Co₁₇磁体高温抗氧化性的影响[J]. 中国腐蚀与防护学报, 2015, 35(2): 183-188.
Minsheng YAN, Jin HE, Shoudong MAO, Lijing YANG, Xia NIE, Zhenlun SONG, Zhaolin ZHAN. Effect of NiCrAlY Coating on Oxidation Resistance of Sm₂Co₁₇ Magnets at High Temperatures. Journal of Chinese Society for Corrosion and protection, 2015, 35(2): 183-188.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2014.055 或 https://www.jcscp.org/CN/Y2015/V35/I2/183

图1 沉积在Sm2Co17磁体表面的NiCrAlY薄膜表面形貌的SEM像

图2 沉积NiCrAlY的Sm2Co17磁体断面形貌的SEM像

图3 沉积在Sm2Co17磁体表面的NiCrAlY薄膜的XRD谱

图4 沉积NiCrAlY前后的Sm2Co17磁体在空气中经不同温度氧化192 h后的截面SEM像和EDS结果

图5 沉积在Sm2Co17磁体表面的NiCrAlY薄膜在空气中经不同温度氧化192 h后的XRD谱

图6 沉积在Sm2Co17磁体表面的NiCrAlY薄膜在空气中经不同温度氧化192 h后表面形貌的SEM像

图7 沉积NiCrAlY前后的Sm2Co17磁体在空气中氧化192 h后的增重曲线

图8 沉积NiCrAlY前后Sm2Co17磁体在不同温度空气中氧化192 h后的退磁曲线

表1 经不同温度氧化192 h后未沉积和沉积NiCrAlY的Sm2Co17磁体的磁性能

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