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周美玲, Hong-Li Suo, Mei-Ling Zhou, Le-Heng Zhai, Zhuo Sun, Xin-Fu Xu, Wei Han, Tie-Yong Zuo
Physica C 282-287(1997)567-568,-0001,():
-1年11月30日
By selecting polycrystalline Ag as the substrates, highly c-axis(O01) textured YBCO films have been fabricated by using a modified magnetron sputtering equipment. Research on the textures of cold rolling Ag at different deformation degree and recrystallization textures of cold-rolling Ag at different temperature shows that in-plane alignment of YBCO film is difficult to obtain directly on cold rolling Ag substrates because of a series of change of textures in Ag during heating. The sharp recrystallization textures with cube (001)[010] and rotated cube(001)[012] in Ag have been developed. Experiments offer a possible prospect for the further study of fabricating sharp biaxially texture in Ag and the following deposition of high J YBCO films directly on it.
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【期刊论文】A study on textured silver tapes used as substrates for YBCO high temperature superconductors
周美玲, Danmin Liu), Meiling Zhou, Yancao Hu, Tieyong Zuo
Physica C 333 (2000) 235-241,-0001,():
-1年11月30日
A single-component, 1104 211:, biaxially textured silver tape was obtained by cold-rolling and annealing. The cold-rolling textures and recrystallization textures of silver were studied systematically. It is shown that a sharp biaxial 1104 texture can be obtained by using higher total rolling reduction, lower reduction per pass and higher annealing temperature. In-plane aligned YBCO film was deposited directly by pulsed laserdeposition PLD. on a textured silver foil having 1104 211: orientation. The critical current density Jc value of 5=105 Arcm2 was obtained at 77 K, 0 T.
Silver, Biaxial 1104 texture, Deformation textures, Recrystallization textures, Coated conductors
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【期刊论文】A study of diffusion behavior of elements lanthanum and oxygen in
周美玲, Mo–La O cathode Wang Jinshu*, Zhou Meiling, Nie Zuoren, Zhang Jiuxing, Zuo Tieyong, Wang Yiman
Journal of Alloys and Compounds 311(2000)82-85,-0001,():
-1年11月30日
The diffusion behavior of elements lanthanum and oxygen in Mo–La O cathode has been carried out by using Auger Electron 2 3 31 21 Spectroscopy. Lanthanum and oxygen ions (La and O) diffuse from the grain boundaries to the surface. The experimental results 31 were analyzed by kinetics of grain boundary diffusion. In the temperature range 1123 K-1423 K, the diffusion coefficients of La and21 O ions were found to fit with the following expression: 216 5 2 21 D 53.6703310 exp(21.01639310 /RT) m s La 216 4 2 21 D 51.5122310 exp(28.13066310 /RT) m s O
Diffusion, Lanthanum, Oxygen, Cathode, Kinetics, Mo–La O 2 3
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周美玲, 王金淑, 左铁镛, 聂祚仁, 张久兴, 张国珍
金属学报,2001,37(6):668~672,-0001,():
-1年11月30日
采用热分析,原位XPS等方法对Mo-La203阴极中La的价态进行了研究,探讨了陔阴极的发射机理实验结果表明,在高温下La203可以被M02C还原成单质La。La2O3-Mo阴极的发射可用原子膜机理解释:住阴极工作过程中,还原得到的La覆盖在Mo基体表面,降低了基体Mo的逸出功,促进了阴极的发射。根据此机理提出r La203-Mo电于管制备和运行工艺,使电子管的工作寿命提高到了满足实际应用要求的水平。
La203-Mo,, 热阴极,, 发射机理,, 价态
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【期刊论文】Chemical stabilityand microstructure of Nd-Fe-B magnet prepared byspark plasma sintering
周美玲, M. Yue*, J.X. Zhang, W.Q. Liu, G.P. Wang
Journal of Magnetism and Magnetic Materials 271(2004)364-368,-0001,():
-1年11月30日
The corrosion resistance and microstructure of anisotropic Nd-Fe-B magnet prepared byspark plasma sintering (SPS) technique were studied. The SPS Nd-Fe-B has displayed more positive corrosion potential Ecorr and lower corrosion current density Icorr than those of the conventional sintered Nd-Fe-B with the same composition in several electrolytes, indicating better anti-corrosion properties. It also shows good stability in an oxidized atmosphere. The microstructure of SPS Nd-Fe-B magnet indicates that the grain size of Nd2Fe14B is fine (about 6 mm) and uniform, and the Nd-rich phase does not form along the grain boundaries of Nd2Fe14B, but agglomerates into the triple junctions. Therefore, the pathways for corrosion propagation are restricted and the inter-granular corrosion process through Ndrich phase in the magnet is suppressed effectively. As a result, the SPS Nd-Fe-B magnet possesses excellent corrosion resistance.
Corrosion resistance, Microstructure, Spark plasma sintering, Nd2Fe14B, Nd-rich phase
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