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. The micro-hardnesses were also evaluated along the cross-section after various annealings. Key words: FeSi alloy; chemical vapor deposition; diffusion; magnetic properties; micro-hardness 1 Introduction... of difficulty in fabrication of the FeSi alloys with higher Si content. As mentioned above, common electric steel with the silicon content less than 3.5% is unsatisfactory compared to FeSi alloy......
Co,Mn对La(FeSi)13 Bx合金及其氢化物磁热性能的影响刘翠兰1,夏伟1,2,黄焦宏1,程娟1,张英德1,李兆杰11. 包头稀土研究院2. 内蒙古师范大学内蒙古自治区功能材料物理与化学重点实验室摘 要:在La(FeSi)13基合金中加入少量间隙原子B后,分别以Co,Mn原子替代Fe原子,熔炼得到的合金样品再吸氢,利用X射线衍射物相分析(XRD)和振动样品磁强计(VSM)测量合金吸氢前后的相结构和磁性能.研究表明,用Co替代Fe原子后,La(FeSi)13B0.2合金的居里温度Tc提高,用Mn替代Fe原子后,La(FeSi)13B0.1合金的居里温度Tc会降低.两种替代都会使La(FeSi)13Bx合金的等温磁熵变降低,但相对于金属Gd来说,其等温磁熵变还保持在一个相对较大的值.吸氢后添加Co......
球磨时间对FeSi合金吸波性能的影响周影影1,2,谢辉1,陶世平1,周万城21. 西安航空学院材料工程学院2. 西北工业大学材料学院摘 要:采用湿法球磨对FeSi合金粉末进行片状化改性,利用扫描电子显微镜(SEM),激光粒度分析仪,矢量网络分析仪对改性前后的FeSi粉末进行测试分析,研究不同球磨时间对FeSi粉末的形貌,粒径,电磁参数,吸波性能的影响.结果表明,随着球磨时间的延长,FeSi粉末的粒径逐渐减小,且扁平化程度增加.模拟反射率结果表明,当球磨时间为8h时,材料在测试频段内吸收值低于-15dB的频宽为2.8GHz,且在10.5GHz处达到最低吸收峰值-28.3dB.关键词:金属材料;吸波性能;湿法球磨;球磨时间;FeSi合金;......
PP+FeSi复合材料流变性能测试及数值模拟李松柏1,KIRCHBERG Stefan2,谢磊2,蒋炳炎11. 中南大学机电工程学院2. Institute of Polymer Materials and Plastics Engineering,Tu-Clausthal.38678,Clausthal-Zellerfeld,Germany摘 要:为探讨注射成型能否生产复杂外形软磁改性塑料器件,配比了聚丙烯(PP)添加不同体积含量FeSi粉末的八个组成试样,测试了试样在不同温度随剪切速率变化的黏度,导热率和比热容,在注塑机上进行了流动长度测试.同时,运用麦夸特法+通用全局优化算法对黏度数据拟合,构建Cross-WLF黏度模型进行数值计算,其结果与试验结果一致.结果表明,随FeSi含量的增加,试样的黏......
FeSi熔体中SiC晶须的VLS生长 林晶1,吴仁兵1,杨光义1,陈建军1,翟蕊1,潘颐1,吴玲玲1 (1.浙江大学,材料科学与工程系,杭州,310027;2.浙江理工大学,材料工程中心,杭州,310018) 摘要:在1500℃,1600℃,1650℃和1750℃氩气中保温3 h,使Fe-Si在石墨基板上熔化并敷展,分别在熔层表面获得SiC颗粒层,SiC颗粒与晶须混合层,SiC晶须层和SiC腾空薄膜.XRD分析确定所有产物均为3C-SiC;TEM和SAED分析表明,SiC晶须为3C-SiC单晶,生长方向为[111].基于上述结果,提出不同温度下C与熔体中的Si经不同反应路径,生成不同形貌SiC的反应机理:低温时(≤1500℃),Fe提高了熔体中C的饱和溶解度,以液-固(LS)反应生成SiC颗粒;较高温度时(1500~1750 ℃),借助Fe的催化作用,以气-液-固(VLS)机理生成......
Effects of Particle Sizes on the Electromagnetic Property of Flaky FeSi CompositesYonggang XU,Liming YUAN,Jun CAI,Jianlu LV,Deyuan ZHANGBionic and Micro/Nano/Bio Manufacturing Technology Research Center,School of Mechanical Engineering and Automation,Beihang University摘 要:Flaky FeSi absorbents with different size ranges were fabricated by sintering......
FeSi中铝对不锈钢连铸和热轧板表面缺陷影响钱国余1,屈志东1,成国光1,李六一1,2,张建国2,李璟宇11. 北京科技大学钢铁冶金新技术国家重点实验室2. 四川金广集团西南不锈钢有限责任公司摘 要:针对硅脱氧条件下304不锈钢中出现的Al2O3夹杂物和热轧板表面存在分层缺陷的问题,通过对铸坯的大样电解,热轧板取样,扫描电镜检测分析以及Fact Sage软件计算等方法,主要研究了Fe Si合金中残余铝质量分数对Al2O3夹杂物生成的影响,并分析了Al2O3夹杂物对不锈钢连铸和热轧板表面分层缺陷的影响.研究表明,硅脱氧条件下生产的304不锈钢整个冶炼过程中,产生Al2O3夹杂物的主要环节为GOR还原初期含有较高铝质量分数的FeSi合金的脱氧过程.通过Fact Sage软件计算得到了避免Al2O3生成时......
The Strengthening of Cu-15Ni-8Sn Alloy WANG Ming-Pu1,WANG Yan-hui1,HONG Bin1 (1.School of Material Science and Engineering, Central South University, Changsha China) 摘要:The microstructure, property and relation between them of Cu-15Ni-8Sn alloy are studied by means of TEM and the measurement of hardness. The results show that γ '' metastable phase strengthens alloy because of its ordering......
of macrosegregated zones versus undercooling Based on the results displayed in Fig. 1, α-Fe solid solution should be the primary phase of homogeneous liquid Fe35Cu35Si30 alloy. Nevertheless, FeSi... are composed of three phases: (Cu) solid solution, FeSi and Fe5Si3 intermetallic compounds. Fig. 4 XRD patterns (a) and typical cooling curves (b) of ternary Fe35Cu35Si30 alloy 3.2 Dendritic solidification......
The Technological Improvements of Aluminum Alloy Coloring by Electrolysis LI Nai-jun1 (1.Teachers College, Shenyang University, Shenyang 110015, P. R. China) 摘要:The technological process of coloring golden-tawny on aluminum alloy by electrolysis was improved in this paper. The optimum composition of electrolyte was found, the conditions of deposition and anodic oxidation by electrolysis were......
