周美玲
金属材料,特别是钨钼、稀土材料和先进功能材料。
个性化签名
- 姓名:周美玲
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
材料科学
- 研究兴趣:金属材料,特别是钨钼、稀土材料和先进功能材料。
周美玲 女,1960年毕业于中南工大金属材料系(本科),留校任教,于1984年、1988年提升副教授、教授。主要从事以金属材料及加工为主的教学科研工作,在难熔金属方面有突出成就,创建国内最早的钨钼材料研究室,担任室主任,兼全国钨协分会副主任。1991年6月作为材料学科的学术带头人调入北京工业大学,历任材料学部主任、学术委员会主任等职至今。1993年由国务院学位委员会评定为博士生导师,并享受有突出贡献专家的待遇。
主要研究方向:金属材料,特别是钨钼、稀土材料和先进功能材料。从“六五”开始,承担国家、省部级科研项目数十项,在稀土、难熔金属材料,高温超导材料,电磁屏蔽材料、磁性材料等的研究方面,承担了多项国家863、973项目,获国家、省部级奖励11项,在她领导下获得了一批重要的科研成果。近五年获教委科技一等奖二项,国家发明二等奖一项(2004年),获第五届中国国际发明展览会金奖二项,发明专利五项。共发表的重要论文120多篇,(被SCI摘引74篇,EI摘引123篇)。
学术任职:1.北工大学位委员会副主任;2.教育部科学技术委员会学部委员;3.中国稀土学会理事;4.中国材料学会理事;5.中国机械学会粉末冶金分会委员;6.钨业协会分会副主任,钨业协会顾问;7.北京市专家顾问团成员。
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主页访问
1060
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成果阅读
320
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成果数
8
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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【期刊论文】Synthesis and thermoelectric properties of CoSb3 compounds by spark plasma sintering
周美玲, J.X. Zhang*, Q.M. Lu, K.G. Liu, L. Zhang, M.L. Zhou
Materials Letters 58(2004)1981-1984,-0001,():
-1年11月30日
Single-phase polycrystalline CoSb3 skutterudite thermoelectric compounds have been synthesized by spark plasma sintering (SPS) and the thermoelectric properties including Seebeck coefficient, electrical resistivity and thermal conductivity are measured from room temperature to 800 K. The CoSb3 compound with relative density of 97.4% and grain size of about 100 nm is achieved under the sintering condition of 873 K for 5 min, and a maximum thermoelectric dimensionless figure of merit value of 0.095 is obtained at about 673 K.
CoSb3, Thermoelectric properties, Spark plasma sintering
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【期刊论文】A study of secondary electron emission properties of the molybdenum cathode doped with RE2O3
周美玲, Jinshu Wanga, *, Hongyi Lia, Juan Liua, Yiman Wanga, Meiling Zhoua, Yujuan Gaob, Siwu Taoa, Jiuxing Zhanga
Applied Surface Science 215(2003)273-279,-0001,():
-1年11月30日
The secondary electron emission properties of rare-earth-doped molybdenum emitter made by aqueous solution-solid doping method, its microstructure and surface behavior are discussed in this paper. The experimental results show that adding rare-earth oxides La2O3,Y2O3 and Gd2O3 into molybdenum raises the maximum secondary electron yield dm from 1.25 of clean Mo to 2.0-3.24 of doped molybdenum when heated to 1100-1600 8C in vacuum. With increasing percentage content of doped rare-earth oxide dm is enhanced in some extent. dm remains nearly constant during 1000h of test period when cathodes are operated at 1100 8C and under primary electron bombardment with bombarding energy of 1000 eVand bombarding power of 300W/cm2. This demonstrates such cathodes have good anti-bombing insensitivity. A work function of about 2.7-2.8 eV is obtained from Richardson lines. SEM observations and EDS analysis show that distribution of rare-earth oxides in the cathode body is inhomogeneous and tends to aggregate at molybdenum grain boundaries. By AES analysis it is found, that atomic concentrations of La and Yon the surface are about 2.5 times higher than in the bulk for a sintered body and further increase after activation.We believe the rare-earth atoms segregated at the grain boundaries diffuse along the grain boundary during the process of cathode activation. Therefore, the surface of the cathode is covered by a certain amount of rare-earth oxide. As a result, the secondary electron yield is improved.
Rare-earth oxides, Doped molybdenum, Secondary emission, Secondary electron yield
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周美玲, 刘伟, 王金淑, 陈以欣, 郑大威
稀有金属材料与工程,2005,34(2):291~294,-0001,():
-1年11月30日
用溶胶-凝胶(Sol-Gel)法制备了RE(RE=La,Y)-Mo复合氧化物粉末,工艺条件:初始溶液pH值=1,于550℃分解胶体,500℃,900℃2次还原粉末。采用XRD,TEM对还原后粉末的相组成、形貌、粒度进行分析。结果表明:500℃还原后,单质Mo衍射峰出现,RE以非晶态RE-O-Mo存在;900℃2次还原后,RE 以氧化物形式存在。红外光谱(FT-IR)分析结果表明,La和Y通过O与Mo键合,削弱Mo=O键,使稀土钼复合氧化物可还原性增强。TEM分析表明,还原后稀土钼粉末粒径在70nm左右。
稀土氧化物, 钼, 溶胶-凝胶, 次级发射阴极
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