检索结果-南通市图书馆

Synthesis and electromagnetic wave absorption properties of gd-Co ferrite@carbon core-shell structure composites

rare Metals 2023年第1期42卷 254-262页

作者： Jing Gao Zhi-Jun Ma Fu-Li Liu Xing-Yuan Weng School of Mining Liaoning Technical UniversityFuxin123000China

Developing high-performance electromagnetic absorbing materials remains a *** this work,gd-Co ferrite@carbon core-shell structure composites were synthesized by a two-step hydrothermal *** effects of rare earth gd doping amount on the microstructure and electromagnetic wave absorption properties of cobalt ferrite@carbon composites were mainly *** results show that an appropriate amount of gd doping can refine the crystal grain size of cobalt ferrite@carbon ***,when the doping amount of gd exceeds the solid solubility threshold,the secondary phase gdFeO_(3)will be generated and the grain size will *** the doping amount of gd is x=0.04,the reflection loss(RL) of the CoFe_(1.96)gd_(0.04)O_(4)@C composites reaches the minimum value of -9.26 dB at the absorption layer thickness of 2.0 mm and a frequency of 13.67 GHz,and the effective absorption band(EAB) is 5.01 GHz(10.95-15.96 GHz).Compared with the CoFe_(2)O_(4)@C composites,the RL of the CoFe_(1.96)gd_(0.04)O_(4)@C composites is increased by 79.35%,and the EAB is broadened by 3.51%.gd ions enhance the dielectric loss through the grain size effect,and the increase of magnetocrystalline anisotropy enhances the magnetic *** CoFe_(1.96)gd_(0.04)O_(4)@C composites have excellent impedance matching,which relies on the strong magnetic loss of ferrite,the interface polarization,and dipole polarization formed by the carbon shell to attenuate electromagnetic waves.

关键词： rare earth gd Cobalt ferrite Core-shell structure composites Electromagnetic wave absorption

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of gd on microstructure, mechanical properties, and corrosion behavior of as-homogenized Mg-8Li-3Al-2Zn-0.2Zr alloy

引用

Transactions of Nonferrous Metals Society of China 2022年第8期32卷 2494-2509页

作者： Yue-hua SUN Ri-chu WANG Chao-qun PENG Xiao-feng WANG School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China School of Materials Science and Engineering Central South UniversityChangsha 410083China

The microstructure observation,tensile test,electrochemical measurement,and corrosion morphology characterization were conducted to study the effect of gd on the microstructure,mechanical properties,and corrosion behavior of as-homogenized Mg−8Li−3Al−2Zn−0.2Zr(LAZ832−0.2Zr)*** addition of trace gd can improve the mechanical properties of as-homogenized LAZ832−0.2Zr alloy by refining the microstructure,reducing the content of AlLi softening phase,and forming Al_(2)gd strengthening ***,the addition of trace gd can weaken the microgalvanic corrosion between matrix phase and AlLi phase,inhibit the galvanic corrosion betweenα-Mg phase andβ-Li phase,and result in the formation of dense oxide film containing gd_(2)O_(3),thereby improving the corrosion resistance of the *** the gd content is 1.0 wt.%,the alloy shows the best comprehensive properties with the ultimate tensile strength of 189.8 MPa,elongation of 42.3%,and corrosion rate(determined by hydrogen evolution)of 0.86 mm·a^(−1).

关键词： Mg-Li alloy rare earth gd microstructure mechanical properties corrosion behavior

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of gd on microstructure and refinement performance of Al-5Ti-B alloy

引用

China Foundry 2021年第3期18卷 223-228页

作者： Dong-song Yin Ning Zhang Ke-ju Chen Yun-long Zhang School of Materials Science and Engineering Heilongjiang University of Science and TechnologyHaerbin 150022China School of Materials Science and Engineering Jiamusi UniversityJiamusi 154007China

Al-5Ti-B and Al-5Ti-B-gd master alloy refiners were fabricated by fluorine salt casting *** microstructure and phase constitution of the master alloys were investigated by scanning electron microscopy (SEM),transmission electron microscopy (TEM) and X-ray diffraction (XRD).The results show that Al-Ti-B alloy refiner consists of Al_(3)Ti phase and TiB2 *** gd is introduced into the intermediate alloy,Ti_(2)Al_(20)gd phase appears in the alloy,the size of Al_(3)Ti is significantly reduced,and Ti-Al-gd phase is found in the edge of Al_(3)Ti *** the same time,some independent Ti-Al-gd phases appear in local areas,which are Ti_(2)Al_(20)gd phase determined by micro-area electron diffraction *** and calculation results of the high-resolution images of the Ti_(2)Al_(20)gd/Al structure show that there is no other compound at the junction between the Ti_(2)Al_(20)gd phase and Al,and Ti_(2)Al_(20)gd phase has a great difference in atomic space with the α-Al,which cannot be directly used as heterogeneous ***,after being decomposed in the aluminum melt,the Ti_(2)Al_(20)gd phase can promote the refinement effect of the *** the Al-Ti-B-gd master alloy,there are many dispersed Al_(3)Ti particles with a size of less than 1 μm,which can promote the Al-5Ti-B refining effect.

关键词： Al-5Ti-B alloy refiner Al_(3)Ti rare earth gd Ti_(2)Al_(20)gd

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：