国家自然科学基金(50025412)

作品数:7被引量:25H指数:3
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相关作者:曲选辉段柏华徐征宙关璐王石钟更多>>
相关机构:北京科技大学中南大学更多>>
相关期刊:《Journal of Rare Earths》《功能材料》《中国有色金属学报》《Rare Metals》更多>>
相关主题:表面改性注射成形粘结钕铁硼磁体粘结NDFEB磁体MOSI更多>>
相关领域:一般工业技术电气工程金属学及工艺理学更多>>
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Low-temperature oxidation behavior of MoSi_2 powders被引量:2
《Journal of University of Science and Technology Beijing》2007年第6期558-561,共4页Peizhong Feng Xuanhui Qu Islam S. Humail Xueli Du 
This work was financially supported by the National Natural Science Foundation of China (No.50025412)
The oxidation behavior of molybdenum disilicide (MoSi2) powders at 400, 500, and 600℃ for 12 h in air were investigated by using X-ray diffraction (XRD) and transmission electron microscopic (TEM) techniques. S...
关键词:molybdenum disilicide low-temperature oxidation accelerated oxidation volume expansion 
Self-propagating high temperature synthesis of MoSi_2 matrix composites被引量:3
《Rare Metals》2006年第3期225-230,共6页Akhtar Farid S.H. Islam 
This project was financially supported by the National Natural Science Foundation of China (No. 50025412)
MoSi2 is presently regarded as the most important material for electrical heating and as one with huge potential for high temperature structural uses. MoSi2 and MoSi2 matrix composites were prepared by self-propagatin...
关键词:powder metallurgy MoSi2 matrix composites self-propagating high temperature synthesis molybdenumtungsten disilicide molybdenum aluminosilicide 
用机械合金化法制备含氮不锈钢粉末被引量:11
《北京科技大学学报》2005年第6期692-694,共3页关璐 曲选辉 贾成厂 王石钟 
国家自然科学基金(No.50025412)
采用机械合金化法(MA)分别在N_2气氛和氨水介质中利用高能球磨进行了含氮不锈钢粉末的制备,探讨了MA法对含氮不锈钢粉末性能的影响.结果表明,随球磨时间延长,粉末含氮量升高,接近高氮不锈钢氮含量,且颗粒不断细化,球磨10h的粉末...
关键词:不锈钢 机械合金化 氮含量 高能球磨 
磁粉表面改性及粒度对注射成形粘结NdFeB磁体性能的影响被引量:3
《功能材料》2005年第1期29-31,共3页段柏华 曲选辉 叶斌 邹黎明 徐征宙 
国家高新技术研究发展计划(863计划)资助项目(2001AA337050);国家自然科学基金资助项目(50025412)
注射成形粘结NdFeB磁体满足了市场对磁体小型化、轻型化及高性能化的要求,因而有着广泛的应用前景.本文研究了磁粉特性对注射成形粘结磁体性能的影响,结果表明:采用硅烷对磁粉进行表面改性,能有效提高NdFeB磁粉的抗氧化性及相应粘结磁...
关键词:注射成形 粘结钕铁硼磁体 表面改性 粉末粒度 磁性能 
Rheologic behavior and PIM processing of WC-TiC-Co powder feedstock
《Journal of University of Science and Technology Beijing》2004年第4期334-337,共4页XuanhuiQu JianxiangGao MingliQin ChangmingLei 
This work was financially supported by the National Natural Science Foundation of China (No.50025412, 50274014), National 863 Program (No.2001AA337050) and National 973 Program (No.TG200067203)
An improved wax-based binder was developed for the powder injection molding(PIM) of WC-TiC-Co cemented carbides. The critical powder loading and the rheologic behavior of thefeedstock were determined. It was found tha...
关键词:powder injection molding (PIM) cemented carbides BINDER RHEOLOGY mechanical properties 
注射成形法制备高性能粘结NdFeB磁体被引量:6
《中国有色金属学报》2004年第10期1653-1657,共5页段柏华 曲选辉 徐征宙 郭世柏 秦明礼 
国家"八六三"计划资助项目(2001AA337050);国家自然科学基金资助项目(50025412)
利用新研制的磁场注射成形机,研究了磁粉表面改性处理、取向磁场强度及装载量对注射成形各向异性粘结NdFeB磁体性能的影响。结果表明:磁粉经硅烷改性后,可在其表面形成一层抗氧化膜,其氧化质量增加率由2.3%下降至0.35%,相应制得的粘结...
关键词:注射成形 粘结钕铁硼磁体 表面改性 取向磁场 
Manufacturing of Injection-Molded NdFeB Magnet with (BH)max111 kJ · m-3
《Journal of Rare Earths》2004年第z1期69-72,共4页Duan Bohua Qu Xuanhui Xu Zhengzhou Guo Shibo Qin Mingli 
Project supported by the National Natural Science Foundation of China (50025412); National 863 Program( 2001 AA337050 )
The bonded NdFeB magnets prepared by injection molding meet with the development tendency of the magnet in small volume, light weight and high performance ,and have a good prospect.In this paper, a modified nylonbased...
关键词:INJECTION molding bonded NDFEB magnet surface treatment alignment MAGNETIC field MAGNETIC material rare earths 
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