摘要
利用铜辊甩带法制备出名义成分为Nd60-xCexFe30Al10(x=0,10,20,30,60)合金条带样品。用X射线衍射仪(XRD)、示差扫描量热仪(DSC)、振动样品磁量计(VSM)测试条带样品的相组成、非晶形成能力和磁性能。XRD结果表明所制备的条带样品基本为非晶结构。DSC研究结果表明,当x=0,10时,样品未出现明显的玻璃转变,而当x=20,30,60时,样品出现了极低的玻璃转变温度Tg,分别为369 K,366 K,365 K,在整个Ce取代Nd的过程中,样品的晶化温度(Tx1,Tx)也随着x的增加而减小。当x≥20时,样品非晶形成能力(ΔTx=Tx1-Tg)随Ce含量增大而减小,其中当x=20时,ΔTx有最大值90 K。VSM结果显示,样品的饱和磁化强度Ms、剩余磁化强度Mr和矫顽力Hc均随Ce含量增加而近似成线性减小,条带样品的铁磁性减弱,Ce60Fe30Al10呈现完全的室温顺磁性。
Nd60-xCexFe30Al10（x = 0, 10, 20, 30, 60） ribbons were prepared from the ingots in argon atmosphere by melting spinning. The amorphous phase, glass forming abilities （GFAs） and magnetic abilities of the alloy samples were examined by X-ray diffraction （XRD）, differential scanning calorimeter.（DSC） and vibrating sample magnetometer （VSM） respectively. XRD results indicated that the ribbons were amorphous. DSC results showed that there was no obvious glass transition in the samples with x = 0, 10, while, the glass transition temperature Tg presented in the sample with x = 20, 30, 60 and decreased with the increase of Ce concentration, especially, the lowest one was 365 K with x = 60. In addition, the crystallization temperature Tx1 and Tx decreased in the whole process that Ce substituted Nd. Thus, the glass forming abilities （△Tx = Tx1 - Tg） decreased as the Ce concentration increased in the samples with x = 20, 30, 60 and the largest one was 90 K. The VSM results revealed that the saturation magnetization Ms, remanence Mr and coervicity Hc linearly declined with Nd substituted by Ce, and ultimately, the Ce60Fe30Al10 presented paramagnetism at room temperature.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第13期16-18,25,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(10874136)
教育部新世纪优秀人才计划(NCET-05-0659)
教育部留学回国人员科研启动基金
