国家自然科学基金(51171122)

作品数：6被引量：19H指数：3
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相关作者：李军包小涛郑青刘颖更多>>
相关机构：四川大学更多>>
相关期刊：《Journal of Rare Earths》《磁性材料及器件》《Rare Metals》更多>>
相关主题：MAGNETSHOT_DEFORMATIONDEFORMEDCOMPACTSNDFEB更多>>
相关领域：一般工业技术电气工程化学工程更多>>
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Microstructure and magnetic properties of hot-deformed anisotropic Nd–Fe–B magnets prepared from amorphous precursors with different crystallization proportions被引量：6
《Rare Metals》2017年第4期268-276,共9页Wei Zhao Ying Liu Jun Li Ren-Quan Wang Yu-Chong Qiu 
supported by the National Natural Science Foundation of China (No. 51171122);the Sichuan Province Science and Technology Support Program (Nos. 2014GZ0090 and 2016GZ0262)
Anisotropic magnets were obtained by hot deformation with the partial crystallized precursor prepared via spark-plasma sintering （SPS）. Amorphous powders with the nominal composition of Nd_28.72Fe_balCo_5.66 Ga_0.59...
关键词：Nd-Fe-B magnets Amorphous precursors Pre-crystallized grains Hot deformation MICROSTRUCTURE 
Highly oriented NdFeB nanocrystalline magnets from partially recombined compacts with ultrafine grain size by reactive deformation under low pressure被引量：5
《Journal of Rare Earths》2015年第12期1298-1302,共5页余云萍 李军 刘颖 王仁全 郑青 连利仙 
supported by the National Natural Science Foundation of China(51171122);the Sichuan Province Science and Technology Support Program(2013GZX0164;2013GZ0056)
The partially recombined compacts with ultrafine grain size were taken advantage of preparing anisotropic nanocrystalline magnets with full density and homogenous microstructure and texture by reactive deformation und...
关键词：NdzFe14B NANOCRYSTALLINE HDDR deformation anisotropy rare earths 
Desorption–recombination behavior of as-disproportionated NdFeCoB compacts by reactive deformation被引量：2
《Rare Metals》2015年第2期89-94,共6页Yun-Ping Yu Ying Liu Jun Li Qing Zheng Ren-Quan Wang 
financially supported by the National Natural Science Foundation of China (No. 51171122)
The disproportionated phases of Nd Hx, Fe2B,and a-Fe from Nd2Fe14B were applied to prepare Nd Fe B magnets by two different routes. The results show that the route of annealing in horizontal vacuum sintering furnace c...
关键词：NdFeB magnets Hydrogenation-disproportionation-desorption-recombination Hotdeformation ANISOTROPY 
Structural and magnetic properties of single-stage hot deformed NdFeB magnets prepared by different initial densities被引量：2
《Rare Metals》2014年第4期448-451,共4页Biao Chen Jun Li Ying Liu Ren-Quan Wang Li-Xian Lian 
financially supported by the National High Technology Research and Development Program of China(No.2011AA03A403);the National Natural Science Foundation of China(No.51171122);the Sichuan Province Science and Technology Support Program(Nos.2011GZ0117 and 2013GZ0056)
The effects of initial density on the magnetic properties of NdFeB magnets prepared by single-stage hot deformation were investigated in this work. The results show that the values of maximum energy product （BH）m an...
关键词：Hot deformation Magnetic properties NDFEB Initial density 
Structural and magnetic properties of backward extruded Nd–Fe–B ring magnets made by different punch chamfer radius被引量：4
《Rare Metals》2014年第3期304-308,共5页Ren-Quan Wang Biao Chen Jun Li Ying Liu Qing Zheng 
financially supported by the National High Technology Research and Development Program of China (No. 2011AA03A403);the National Natural Science Foundation of China (No. 51171122);the Sichuan Provence Science and Technology Support Program (Nos. 2011GZ0117 and 2013GZ0056)
Radially oriented Nd-Fe-B ring magnets were prepared by backward extrusion of MQ-C powder. The punch chamfer radius has a great impact on the microstructure and magnetic properties of the ring magnet. With the chamfer...
关键词：Backward extrusion Nd-Fe-B ring magnet Microstructure Alignment 
反应球磨与脱氢-再结合制备的Sm_2Fe_(17)N_x永磁粉
《磁性材料及器件》2013年第3期1-3,7,共4页包小涛 刘颖 李军 郑青 
国家自然科学基金资助项目(51171122)
采用机械球磨的方法使氢化后的Sm-Fe合金实现歧化,再利用脱氢-再结合和氮化反应两步热处理制备出Sm2Fe17Nx永磁粉。研究了球磨时间对颗粒形貌、歧化产物、再结合产物和磁性能的影响。结果表明,球磨促使Sm-Fe合金发生歧化,到40h时基本歧...
关键词：Sm2Fe17Nx永磁粉 机械球磨(MG) 氢化 岐化 脱氢 再结合(HDDR) 氮化 矫顽力 
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