王铀
博士研究生 教授
哈尔滨工业大学 材料科学与工程学院
纳米材料热喷涂
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- 姓名:王铀
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:高级-教授
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学科领域:
材料科学
- 研究兴趣:纳米材料热喷涂
王铀教授,国际知名摩擦学家和表面工程专家,是纳米材料热喷涂领域的开拓者之一,是稀土元素用于热喷涂和激光表面改性领域的第一人。王铀教授于1974 年入哈工大学习,1986 年2 月起师从于著名科学家雷廷权院士攻读博士学位,1989 年获哈工大工学博士,1991 年清华大学博士后出站被评为副教授,1993 年任北航教授。1994 年4 月出国后曾任加拿大马尼托巴大学访问教授,美国国家标准技术研究院(原国家标准局)客座科学家,美国纳米材料集团高级工程师兼项目经理,加拿大阿尔伯塔大学访问教授。
王铀教授现己发表科研论文130 余篇,并获批多项美国和国际发明技术专利。数十篇文章为SCI 收录,为同行在国际杂志引用200余次。
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1008
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成果数
19
王铀, W. LI∗, Y. WANG, M. F. YAN
,-0001,():
-1年11月30日
In a concerned tribological system, mechanical behavior such as friction and wear,microstructural evolution, and change in environmental temperature impact each other. Acomplete understanding of these interactions between the above factors is important for atribological system to function well. In this study, the relationships among the wear rate,the frictional surface temperature, the heat consumption, and the friction energyconsumption of steel 52100 with different microstructures during dry sliding wereinvestigated using wear tests and theoretical approaches. The experimental results showedthat the wear rate depends strongly on the thermal physical properties of the differentmicrostructures due to their different energy consumptions during sliding. The calculationsbased on a frictional temperature field model were consistent with the experimentalobservations.
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【期刊论文】Nanostructured Ni-WC-Co composite coatings fabricated by electrophoretic deposition
王铀, Y. Wanga, b, *, Z. Xub
Surface & Coatings Technology 200(2006)3896-3902,-0001,():
-1年11月30日
Electrophoretic deposition (EPD) was applied to the fabrication of nanostructured Ni-WC-Co composite coatings on nickel-platedstainless steel substrates. The micro-hardness and ball-on-disk sliding wear of the sintered composite coatings were tested for, and the resultscorrelated to those of the microstructure analysis, which was determined by scanning electron microscopy (SEM) and X-ray diffraction(XRD).Sintering after EPD on the substrates and high-pressure pressing resulted in dense composite coatings containing high volume fractionalof nanostructured WC or WC-Co particles. Compared with pure nickel coatings or stainless steel, the coatings containing nanostructuredWC-Co particles showed a significant increase in hardness and wear resistance. The remarkable improvement in hardness and wearresistance is attributed to the dispersion hardening of nanostructured WC-Co particles in the composite coatings.
Nanostructured Ni-WC-Co coatings, Nanostructured WC-Co particles, Electrophoretic deposition, Sintering, Hardness, Wear
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王铀, W. Lia, b, *, M. Ca c, Y. Wangd, S. Yue
Scripta Materialia (2005), 1~4,-0001,():
-1年11月30日
The effect of deformation on the electronic work function (EWF) has been well documented and the dislocation mechanism respon-sible for the change in the EWF due to deformation has been postulated. This letter reports our recent experimental investigations on the change in the EWF of tensile specimens using a scanning Kelvin probe. It was demonstrated that both strain and strain rate can decrease the EWF, which is consistent with the previous experimental observations using different deformation conditions and which basically supports the postulation.
Work function, Strain, Strain rate, Dislocation density
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【期刊论文】Electrochemical Synthesis of Gold Nanocrystals and Their 1D and 2D Organization
王铀, Shaoxin Huang, †, ‡, Houyi Ma, *, Xiaokai Zhang, §, Feifei Yong, Xingli Feng, Wei Pan, Xuning Wang, You Wang, and Shenhao Chen‡
J. Phys. Chem. B, Vol. 109, No.42, 2005,-0001,():
-1年11月30日
Size-controlled gold nanocrystals were conveniently synthesized through direct electroreduction of bulk AuCl4-ions in the presence of poly(N-vinylpyrrolidone) (PVP). PVP greatly enhanced the gold particle formationprocess and also significantly retarded the gold electrodeposition process, allowing the electrochemical synthesisof gold nanocrystals to be carried out in the form of simple electroreduction. This novel electrochemicalmethod may be extended to synthesis of other noble metal nanoparticles with controllable size on a largescale. The PVPK90-protected gold nanocrystals spontaneously self-assembled into nearly ordered 2D closepackedarrays and interesting 1D nanostructures. The aggregation of unstable PVPK17-protected goldnanocrystals resulted in the formation of ultrathin single-crystalline films. PVP plays multifunctional roles incontrolling the size and shape of gold nanocrystals and in inducing individual gold nanocrystals to construct1D nanostructures. The nanoparticle self-assembling technique based on PVP offers a simple, but effective,path to organize individual gold nanoparticles into various 1D and 2D nanostructured materials.
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【期刊论文】An electronic criterion for the intrinsic embrittlement of structural intermetallic compounds
王铀, W. Lia) Y. Wang M. Cai C. W. Wang
JOURNAL OF APPLIED PHYSICS 98, 083503 (2005),-0001,():
-1年11月30日
Development of intermetallics for high-temperature structural applications has long been impededby their brittleness. To overcome the brittleness, efforts have been devoted to understand the atomicbonding nature of intermetallics. However, there are no simple theoretical or experimental means forinvestigating the electronic origin of the brittleness. We find a simple experimental method, whichemploys the Kelvin-probe technique to measure the electron work function. The typicalintermetallics in three alloy systems Ni-Al, Fe-Al, and Ti-Al[1] were chosen as examples. Anelectronic criterion was therefore proposed for judging intrinsic brittleness. This criterion couldprovide some principles for improving the ductility of intermetallics and is also expected to beextendable to other materials e.g., quasicrystalline alloys and metallic glasses[1].
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王铀, Y. Wang, W. Chen*
Surface and Coatings Technology 183 (2004) 18-28,-0001,():
-1年11月30日
In this paper, the microstructure, mechanical properties and high-temperature carburization resistance of HVOF thermal sprayed NiAl intermetallic-based coatings were investigated by scanning electron microscopy, X-ray diffraction and micro-indentation testing. It was found that the addition of CeO2 and Cr improves the wetting and bond strength of the coatings to the substrate, which decreases the tendency of brittle peeling during thermal spraying. The addition of CeO2 and Cr is also beneficial in forming coating layers with less cracks and pores. The NiAl intermetallic coatings containing CeO2 and Cr also exhibit higher hardness, improved elastic modulus and increased η ratio. The hardness and elastic modulus of the NiAl intermetallic-based alloy coatings were all decreased after carburizing at high temperature. The η ratio was also decreased after carburization for coatings without the addition of CeO2 but to a minor degree for those containing CeO2. These observations are related to the reduced depletion of and inter-diffusion between the coating layer and the substrate due to the presence of CeO2 and/or Cr. Compared with uncoated HP steel, the samples with different NiAl coatings exhibited excellent carburization resistance in2 vol.% CH4 balance hydrogen gas mixture with a carbon activity of ac=3at 1100℃. This may result from the diffusion barrier role of the NiAl coatings and the presence of oxide films such as Al2O3 and CeAlO3.
HVOF thermal spray, NiAl intermetallic-based coatings, CeO, Micro-indentation, High-temperature carburization resistance
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王铀, You Wang a, b, c, *, Tingquan Lei b, Jiajun Liu a
Wear 231(1999)20-37,-0001,():
-1年11月30日
The wear micromechanisms of various microstructures in 52100 and 1080 steels were studied, using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and microhardness indentation. The results show that the difference in wear resistance of various microstructures depends not only on differences in microstructural thermal stability, resistance to plastic deformation, resistance to initiation and propagation of microcracks, especially, but also on the dynamic changes of different microstructures and the difference in energy consumption in wear surface layers during sliding.
Tribo-metallographic behavior, Steel, Dry sliding wear, Dynamic metallography, Microstructural changes, Energy consumption
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【期刊论文】Nano- and submicron-structured sulfide self-lubricating coatings produced by thermal spraying
王铀, Y. Wang*, **
Tribology Letters, Vol. 17, No.2, August 2004, 165-168,-0001,():
-1年11月30日
Nano-and submicron-structured iron sulfide self-lubricating coatings were produced by the HVOF thermal spraying method. Tribological tests showed that the thermal sprayed self-lubricating coatings not only exhibit a low coefficient of friction, but also showed excellent sliding wear resistance and high load capacity. This technique opens up a new way to make high performance self-lubricating coatings on components or parts, such as piston rings, cylinder liners, gears, heavy duty rear axle spiders, and rollers, especially parts working in difficult lubrication conditions.
nano,, iron sulfide,, self-lubrication coating,, thermal spray,, tribology
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【期刊论文】Significant Improvement in Room Temperature Ductility of NiAl by Cr-Ce Complexes
王铀, W. Chen, Y. Wang, J. Hines
,-0001,():
-1年11月30日
Significant improvement in room temperature ductility of the conventionally cast NiAl alloy was achieved by adding less than 3 at% of Cr and a trace amount of Ce. This improvement has also accompanied with a minor reduction in strength. It was found that the solubility of both the Cr and Ce was increased by their co-presence in NiAl, which was believed to be a result of forming Cr-Ce complexes in NiAl.
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王铀, Y. Wang, W. Chen*, L. Wang
Wear 254(2003)350-355,-0001,():
-1年11月30日
This investigation reports the effect of CeO2 and Cr additives on the microstructures, micro-indentation and erosion properties of the high velocity oxy-fuel (HVOF) thermal sprayed NiAl intermetallic coatings. It has been found that the addition of CeO2 and Cr reduces the tendency of brittle peeling of NiAl intermetallic coatings during thermal spraying, presumably due to the improved wetness and bond strength of the sprayed intermetallic materials. The NiAl intermetallic coatings containing CeO2 and Cr are also featured with fewer cracks, less porosity, higher hardness, and higher elastic modulus than the pure NiAl coatings. Due to the improvement in mechanical properties and physical integrity, the NiAl intermetallic coatings containing CeO2 and Cr have exhibited significant increase in their erosion resistance compared with that of pure NiAl coatings. The possible mechanisms related to the improved microstructures, mechanical properties and erosion resistance of the NiAl intermetallic coatings containing CeO2 and Cr additives are also discussed.
Thermal spray, NiAl intermetallic alloy coatings, CeO2, Micro-indentation, Erosion
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