吴玉程
金属基纳米复合材料、纳米功能结构组装、表征和物性研究。
个性化签名
- 姓名:吴玉程
- 目前身份:
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学术头衔:
博士生导师
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学科领域:
材料科学
- 研究兴趣:金属基纳米复合材料、纳米功能结构组装、表征和物性研究。
吴玉程教授1984年6月毕业于合肥工业大学金属材料专业(本科),取得学士学位;1987年6月毕业于合肥工业大学金属材料专业,获得硕士学位,研究方向:金属表面技术强化;2000年7月毕业于中国科学院固体物理研究所凝聚态物理专业,研究方向:纳米材料与功能纳米结构,获得理学博士学位。2001年赴德国斯图加特大学(University of Stuttgart)开展合作研究,承担德国国家自然科学基金研究,研究课题:Free Volumes and Interface Characterization of Nanocrystalline Nd-Fe-B and Pr-Fe-B Magnetic Magnets。现为合肥工业大学材料学院副院长、教授、博士生导师。
自从1990年以来,主讲《金属学与热处理》、《机械工程材料》、《金属物理性能》、《材料设计原理》、《功能材料》和《纳米材料》等多门本科课程, 主讲《固态相变与扩散》、《材料表面与界面》、《功能材料》等多门研究生课程。主持国家自然科学基金、国家机械工业发展基金、安徽省自然科学基金、安徽省"十五"科技攻关和日本NGSF基金项目等10多项,参加国家"纳米材料科学"攀登计划项目、"纳米材料与纳米结构"国家重大基础研究(973)项目和"纳米科学技术:纳米功能材料-主客体组合材料制备、相互作用与应用"中国科学院创新项目等研究。担任中国仪表材料学会常务理事,中国材料研究学会高级会员,德国物理学学会(DPG)会员,中国机械工程学会材料学会青工委常务理事,安徽省材料热处理学会理事,安徽省纳米科技发展委员会委员,《合肥工业大学学报》(自然科学版)、《电镀与涂饰》、《机械工程材料》等编委,中国机械工业青年科技专家,原国家机械工业部和安徽省2000年跨世纪学术骨干和学科带头人。分别获得合肥工业大学青年科技奖、机械工业部科技奖、机械工业部教书育人特等奖和中国机械工业优秀青年科技专家等。
目前,现正指导硕士研究生8人,博士研究生8人,开展金属基纳米复合材料、纳米功能结构组装、表征和物性研究。
取得的学术成就表现在如下方面:在德国斯图加特大学,承担德国国家自然科学基金项目(DFG, Wu 191/4-1),运用正电子湮灭等固体物理实验手段,开展纳米晶(NdFeB, PrFeB)及纳米复合材料晶界结构、缺陷与扩散研究。观察到纳米晶Pr2Fe14B在从非晶态转变过程到晶粒长大过程,晶界结构与缺陷发生显著的变化,存在两种界面结构模式,对于纳米晶组织与性能控制,提高稀土永磁材料磁学性能与纳米复合材料设计具有重要意义(分别提交ITAP-MPI年度报告、Land Baden-Württemberg州政府科技报告,在德国Regensburg 2002 DPG大会上口头报告研究成果,论文发表在《Phys. Stat. Sol. 》等刊物),此前未见过相关研究报道。研究了过渡族金属(Ni, Fe, Co, Pd)与介孔固体(TiO2, SiO2)的组装与物性,对介孔结构与功能进行设计与控制,提出介孔基体与异质相结构互相影响及相互作用规律(承担国家纳米结构与纳米材料973项目(G19990645)、中国科学院创新项目研究:主客体组合材料制备、相互作用与应用研究等,解决了介孔组装过程中主客体尺度、结构形式和分布状态控制,为纳米复合材料的组成、性能控制与在环保等领域的应用提供参考依据。另外在化学沉积合金及复合涂层、纳米涂层技术等方面,也做了大量工作,获得高耐磨表面复合涂层的工艺和组织性能变化控制方法, 对于取代有污染的电镀硬铬镀层, 对我国推广高性能无污染的表面涂层技术具有重要意义, 也有益于扩大化学沉积表面涂层技术的应用领域。
吴玉程教授近年来先后在《Phys. stat. sol. 》、《Advanced Materials》、《Materials Research Bulletin》、《 Z. Metallkund》、《物理学报》等国内外学术刊物发表论文90多篇, 译著有《模具工程》, 参著《超微粉体材料与应用》(超微粉体涂层材料)(中国石化出版社)等。
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吴玉程, WU Yu-cheng, , WU Xia, LI Guang-hai, ZHANG Li-de
Trans. Nonferrous Met. Soc. China Dec. 2003 Vol. 13 No.6,-0001,():
-1年11月30日
In order to investigate the effects of nanosized metallic palladium loading and calcination on the characteristics of composite silica, the silica was prepared by sol-gel technique, leading to an amorphous solid with mesoporosity, and the pore size distribution is narrow, centered at 35nm. The composite silica was formed by impregnating palladium precursor into the porous network with sequel calcination in hydrogen. The results show that the nanosized palladium as guest phase in the composite silica is subjected to the mesoporous structure and calcination, resulting in the changes of optical adsorption that red-shifted to higher wavelength with the palladium loading and the heating temperature. The tailoring of the optical properties can be ascribed to the effect of the nanosized metal particles and interactions occurred between palladium and silica.
nanosized palladium, silica host, nanocomposites, calcinations
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吴玉程, Yucheng Wu, , *, Yong Zhang and Lide Zhang
CHINA PARTICUOLOGY Vol. 2, No.1, 19-24, 2004,-0001,():
-1年11月30日
Nanosized palladium particles were incorporated into mesoporous silica matrix to obtain nanocomposites using the sol-gel technique. Effects of the finely dispersed metallic palladium on the microstructure and properties of the nanocomposites were investigated. By means of X-ray diffraction and optical absorption, it was found that palladium particles were 5~9nm in diameter and their uniform dispersion in the mesoporous silica depended on both the content of the palladium and the structural features of the silica matrix. The results showed that the mixing method of preparation led to wider size distribution of the nanosized particles as compared to the immersion method, but dispersed degree was reduced. Although the incorporation of nanosized palladium particles could not substantially induce significant structural changes of the matrix, the apparent red-shifted optical absorptions for the nanocomposites were observed as compared to the parent monolithic silica, particularly with increase in palladium loading and calcination temperature.
nanosized palladium particle,, sol-gel,, nanocomposite,, optical properties
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【期刊论文】Interfacial defects of hard magnetic Pr2Fe14B phase from amorphous to nanostructures ①
吴玉程, WU Yu-cheng
Trans. Nonferrous Met. Soc. China Aug. 2004 Vol. 4 No.4,-0001,():
-1年11月30日
The interfacial defects of hard magnetic Pr-Fe14B phase from amorphous to nanostructures have been investigated by positron lifetime spectroscopy. The nanostructure was produced by melt-spinning and nanocrystallization route. The two main components can be ascribed to vacancy-like defects in the intergranular layers or the interfaces, and microvoids or large free volumes with size compared to several missing atoms at the interactions of the atomic aggregates or the crystallites. The remarkable changes in the positron lifetimes from the amorphous structure to the nanocrystructure with varied sizes can be interpreted, indicating that the structural transformation and the grain growth induce the defect changes occurring at the interfaces with different shapes and sizes.
Pr-Fe14B, amorphous, nanostructure, interfacial structure
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吴玉程, W. Yucheng, , Z. Lide, L. Guanghai, Z. Yong, and S. Guangmin
Journal of Materials Synthesis and Processing, Vol. 10, No.4, July 2002,-0001,():
-1年11月30日
The preparation and optical characterization of nanocomposites comprised of palladium into mesoporous silica are presented in this paper. Introduction of palladium was conducted through two different routes involving the sol-gel technique. In the first route, monolithic porous silica produced by hydrolysis of alkoxides in advance was then impregnated into the concentrated solution containing palladium precursor, and the nanocomposite was manufactured after a sequent thermal treatment. In the another route, a mixture made with the alkoxides and palladium precursor added in water was stoichiometrically prepared with the hydrolysis and condensation reactions, resulting in a formation of the composite silica gel. The introduced palladium particle was subjected to the matrix, varied with the composition and found to be 5-10nm in scale. The optical absorption measurements show that the edges were red-shifted to a certain extent with an increase in the composition and heated temperature. The changes can be responsible for the interactions between the matrix and the introduced phase. IR characterization for the monolithic silica and the nanocomposites was also performed for the further explanation.
Sol-gel, mesoporous silica, nanocomposite, optical absorption.,
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