HU Benfu University of Science and Technology Beijing
,
Beijing
,
ChinaTAKAHASHI Heishichiro
,
ITOH Hisatoshi
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TAKEYAMA Taro Hokkaido University
,
Sapporo
,
060
,
Japan Associate Professor
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Dept of Materials Science and Engineering
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University of Science and Technology Beijing
,
Beijing 100083
,
China
金属学报(英文版)
The behavior of void swelling and segregation in Fe-15Cr-xMn alloys and an alloy con- taining small amount of W and V was investigated by electron-irradiation.The compositional analysis in the irradiated regions including grain boundaries was performed.The resultdts show that there are many common features of irradiuation tehavior in the Fe-Cr-Mn and Fe-Cr-Ni systems while there are some significant differences,In the Fe-Cr-Mn alloy sys- tems void swelling was rematrkably suppressed and at the same time the radiation-induced segregation was also retarded,furthermore,the segregation was strongly retarded in an Fe-15Cr-15Mn alloy containing small amount of W and V.The results also show that Ni re- placed by Mn does not in general confer immunity from either swelling or phase instabilities. The phase instability is due to the different diffusion behavior of Ni and Mn in reponse to the operation of the inverse-Kirkendall effecr.Fe segregates to the microstructural sinks in the Fe-Cr-Mn alloys.The segregation of Fe often leads to the formation of ferrite.This fact is beneficial to reducing the swelling rate and segregation on the grain boundaries.
关键词:
electron irradiation
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null
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null
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null
黄爱萍
,
何华辉
,
冯则坤
,
汪世雷
,
熊惟皓
无机材料学报
doi:10.3724/SP.J.1077.2007.00474
采用传统氧化物法制备了MnZn铁氧体材料和NiZn铁氧体材料. 分析了贫铁MnZn铁氧体磁导率的频散特性, 在K. Itoh等人二段型频散特性模型的基础上, 提出了与实际测量数据更相符合的三段型频散特性模型, 并用三段型频散特性模型计算模拟了磁导率的频率特性曲线. 同时通过研究Fe2O3、TiO2含量对贫铁MnZn铁氧体磁导率的影响, 得出三段型频散特性模型各参数对磁导率频率特性的不同贡献.
关键词:
MnZn铁氧体
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Fe-poor
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permeability spectra
黄爱萍
,
何华辉
,
冯则坤
,
汪世雷
,
熊惟皓
无机材料学报
doi:10.3321/j.issn:1000-324X.2007.03.020
采用传统氧化物法制备了MnZn铁氧体材料和NiZn铁氧体材料.分析了贫铁MnZn铁氧体磁导率的频散特性,在K.Itoh等人二段型频散特性模型的基础上,提出了与实际测量数据更相符合的三段型频散特性模型,并用三段型频散特性模型计算模拟了磁导率的频率特性曲线.同时通过研究Fe2O3、TiO2含量对贫铁MnZn铁氧体磁导率的影响,得出三段型频散特性模型各参数对磁导率频率特性的不同贡献.
关键词:
MnZn铁氧体
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贫铁
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磁导率频散特性
刘达
,
雷洪
,
王天龙
,
张红伟
材料与冶金学报
doi:10.14186/j.cnki.1671-6620.2015.02.005
基于前人的实验结果和已有的热力学数据,通过热力学计算分析了Fe-Al-O三元系的反应产物、反应平衡常数,以及活度系数对铝脱氧化学平衡的影响.计算结果表明,在炼钢过程中,Fe-Al-O三元系的反应产物为Al2O3;当w[Al]＜0.1％时,已有的热力学数据给出的铝脱氧平衡反应曲线呈现出相似的规律(钢中w[O]随着w[Al]的增加而减少);如果采用日本学术振兴会给出的标准吉布斯自由能,并忽略二阶相互作用系数,在w[Al]接近3.5％时会给出错误解;铝脱氧的标准吉布斯自由能和相互作用系数采取Itoh的建议值,则可给出合理的结果;铝脱氧平衡曲线“上翘”的原因是一阶活度系数影响的结果,二阶相互作用系数仅减小铝氧平衡曲线“上翘”的程度.
关键词:
铝脱氧
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脱氧热力学
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相互作用系数
,
Fe-Al-O三元系
,
活度
