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Chinese Journal of mechanical engineering 2002年第3期15卷 279-283,288页

作者： Xu Hua Lu Changchun Zhu Junkey laboratory of Education Ministry for Modern Design and Rotor Bearing System, {2.’ an jiaotong University, {2.’ an 710049, china xi'an jiaotong University Key Laobratory of Education Ministry for Modern Design and Rotor Bearing System Xi'an 710049

The viscoelastic properties of the normal PTFE plastic and strengthened PTFEplastic for bearing pad are measured. The mechanical properties of the composite material forbearing pad, which is made of the aforementioned plastics as matrix reinforced by fine bronzeelastic springs, are modeled and relaxation modulus of the material are presented. The differencebetween these two kinds of PTFE is studied. The results show that the complex modulus of PTFEplastics for bearing pad is higher than that of normal PTFE plastics.

关键词： Composite material for bearing pad Viscoelastic property Relaxationmodulus

原位生成棒晶增强Ti-B-X复相陶瓷的研究

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无机材料学报 2001年第6期16卷 1243-1249页

作者：李世波温广武张宝生哈尔滨工业大学材料科学与工程学院西北工业大学凝固技术国家重点实验室西安710072

Ｂ４Ｃ与Ｔｉ在１８００°Ｃ×３５ＭＰa×１ｈ的烧结条件下反应生成了TiB2.棒晶，棒晶长度在１０～３０μｍ，其长径比在２～８范围．原位生成的棒晶赋予了材料具有极高的力学性能，材料的弯曲强度和断裂韧性分别为６８０ＭＰａ和１... 详细信息

Ｂ４Ｃ与Ｔｉ在１８００°Ｃ×３５ＭＰa×１ｈ的烧结条件下反应生成了TiB2.棒晶，棒晶长度在１０～３０μｍ，其长径比在２～８范围．原位生成的棒晶赋予了材料具有极高的力学性能，材料的弯曲强度和断裂韧性分别为６８０ＭＰａ和１２ＭＰａ·ｍ１／２．通过Ｘ射线衍射检测了材料的物相组成，利用扫描电镜及透射电镜观察了材料的显微结构．最后讨论了温度及金属Ｔｉ含量对棒晶ＴiＢ2.生成及发育的影响．

关键词：原位生成 TiB2.晶显微结构棒晶发育硼化钛棒晶钛-硼-碳复相陶瓷

Effects of the 3d transition metal doping on the structural, electronic, and magnetic properties of BeO nanotubes

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Chinese Physics B 2014年第1期23卷 357-362页

作者：张建民宋婉婷李欢欢徐可为 JiVincent College of Physics and Information Technology Shaanxi Normal University Xi 'an 710062 China state key {2. for mechanical behavior of materials Xi'an Jiaotong University Xi' an 710049 China ICMMO/LEMHE Universitd Paris-Sud 1191405 Orsay Cedex France

First-principles calculations have been performed on the structural, electronic, and magnetic properties of seven 3d transition-metal （TM） impurities （V, Cr, Mn, Fe, Co, Ni, and Cu） doped armchair （5,5） and zigzag （8,0） beryllium oxide nanotubes （BeONTs）. The results show that there exists a structural distortion around the 3d TM impurities with respect to the pristine BeONTs. The magnetic moment increases for V- and Cr-doped BeONTs and reaches a maximum for Mn-doped BeONT, and then decreases for Fe-, Co-, Ni-, and Cu-doped BeONTs successively, consistent with the predicted trend of Hund＇s rule to maximize the magnetic moments of the doped TM ions. However, the values of the magnetic moments are smaller than the predicted values of Hund＇s rule due to the strong hybridization between the 2. orbitals of the near O and Be ions of BeONTs and the 3d orbitals of the TM ions. Furthermore, the V-, Co-, and Ni-doped （5,5） and （8,0） BeONTs with half-metal ferromagnetism and thus 100% spin polarization character are good candidates for spintronic applications.

关键词： BeO nanotubes,transition-metal atoms half-metal ferromagnets first-principles calculation

Size-dependent elastic fields of semi-infinite body with a nanosized spheroidal cavity under biaxial loading at infinity

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Size-dependent elastic fields of semi-infinite body with a n...

Preparation of Electrically Conductive Filler for Anisotropic Conductive Adhesive

第十一届全国现代数学和力学学术会议

作者： Z.Y Ou~(1,2.,G F.Wang~2.T.J.Wang~2.1 school of science,Lanzhou University of Technology,Lanzhou 730050 2.Department of {2. Mechanics,MOE key laboratory for Strength and Vibration, xi’an jiaotong University,xi’an 710049

When inhomogeneous inclusions or cavities exist in elastic materials,the intensifications of applied stress in their vicinity play a dominant role in controlling the {2. behaviors of the *** degree of this stress concentration depends on the inhomogeneities or cavities of the elastic moduli,shape,sizes,locations of the inclusions or cavities and loading conditions,*** of the effect of inclusions or cavities is especially important in fatigue and fracture *** of the existing analyses on the inclusions or cavities have dealt with an infinite ***,their solutions do not satisfactorily clarify the mechanics of inclusions or cavities near free surface of the material.

关键词： surface elasticity semi-infinite body spheroidal cavity potential function elastic field

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上海交通大学学报 2007年第S2期41卷 127-130,138页

作者：华丽安兵吴懿平吴丰顺王佳何敬强 state key Lab.of {2. Processing and Die & Mould Technology Huazhong Univ.of Science & Technology

The preparation process of electrically conductive filler for anisotropic conductive adhesive was performed and *** spherical filler contains tri-layer structures: resin core,Ni-P intermediate coating layer,Au outer coating *** 4 μm resin spherical cores were synthesized by monodispersion polymerization *** they were contributed to electrical conductivity by electrolessly plating Ni-P layer and gold *** particles have good corrosion resistance,high stability,and enough mechanical *** mixed with thermosetting epoxy resin to produce anisotropic conductive adhesive(ACA),it can realize a good conductive bonding between bumps on dies and pads on *** environmentally friendly conductive material offers numerous advantages over conventional solder technology and is an ideal substitute for the lead-contained solder in electronics packaging.

关键词： anisotropic conductive adhesive(ACA) monodispersion polymerization microsphere electroless plating

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***法制备c-BN膜的研究

无机材料学报 1999年第4期14卷 607-612页

作者：张晓玲胡奈赛何家文西安交通大学金属材料强度国家重点实验室

采用ＦＴＩＲ、ＴＥＭ、ＳＥＭ等技术，对在渗硼层表面经ｒｆ ＰＣＶＤ沉积的ＢＮ膜进行了研究试验证明，与采用Ｎ２气和Ｈ２气相比，以Ａｒ＋１０ｖｏｌ％Ｈ２作为载气，所获得的膜层ｃ ＢＮ... 详细信息

采用ＦＴＩＲ、ＴＥＭ、ＳＥＭ等技术，对在渗硼层表面经ｒｆ ＰＣＶＤ沉积的ＢＮ膜进行了研究试验证明，与采用Ｎ２气和Ｈ２气相比，以Ａｒ＋１０ｖｏｌ％Ｈ２作为载气，所获得的膜层ｃ ＢＮ含量最高，膜厚最大，可达４６μｍ，且膜基结合良好而以Ｎ２气或Ｈ２气为载气时，前者会导致膜基结合力大大下降，后者会引起沉积速度明显降低结果表明，对于ＰＣＶＤ过程，控制ｃ ＢＮ形成的主要因素是离子轰击能量的转移，而不是氢的选择溅射过程试验获得的膜层由ａ ＢＮ和ｃ ＢＮ组成，ｃ ＢＮ的尺寸为２０

关键词： c-BN膜 PCVD 镀膜制备

INFLUENCE OF EXTRUSION ON DAMPING CAPACITIES OF AS-SPRAY DEPOSITED HIGH SILICON ALLOY ZA2. MODIFIED BY CERIUM

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Acta Metallurgica Sinica(English Letters) 1997年第5期10卷 437-444页

作者： YC. Liu G.C. Yang YL. Lu and Z.G. Zhu (state key Lab. of Solidification Processing, Northwestern Polytechnic University, {2.’an 710072. china laboratory of Internal Friction and Defects in Solids, Chinese Academy of science, Hefei 2.0031, china ) Northwestern Polytechnical Univ Xi'an China

The effects of cerium modification and extrusion on the resultant damping behavior and mechanical properties of the as-sprayed high silicon alloy ZA2. were investigated in an thort to develop a new functional {2. possessing high damping capacity and good mechanical properties. The damping capacity, as well as the rslative dynamic modulus, was tneasured at frequencies of 1 and 4 Hertz over the 30 to 2.0℃runge. At below 80℃ the as-sprayed materials appear to be approximately Asquency independent. Above 80℃, the,naterials becotne temperature sensitive, exhibiting the highest damping for the lowest hequency. The extruded, as-sprayed high silicon alloy ZA2. modified by cerium has the highest damping capacity and elongation values among them. The micro8tructure of the as-sprayed high silicon alloy ZA2. modified by 0. 5 wt% cerium was made up of fine lamellar eutectoid, porositg, a light dot-like phase and a polygonal silicon-rich phase. Finally, the opemtive damping tnechanisms were discussed in light of the data obtained hem characterization of microstructure and damping capacity. The high damping capacity was attributed primarily to phase interface thermoelastic damping between the lamellar phases with various substrvctures,except for the grain refinement.

关键词： spray deposition damping capacity cerium modification extrusion

Love waves in piezoelectric layered structure with functionally graded material half space

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Love waves in piezoelectric layered structure with functiona...

2.11年全国压电和声波理论及器件应用研讨会

作者： xiao-Shan CAO~(1,*) Feng JIN~2.xiao-Yi MO~1 Jun-Ping SHI~1 1 Department of {2. Mechanics,xi''an University of Technology,xi*an 710048 2.MOE key laboratory for Strength and Vibration,xi''an jiaotong University,xi''an 710049

＜正＞In this theoretical study,we investigate the propagation of Love waves in a piezoelectric layered *** substrate of the layered structure is a functionally graded material（FGM） in which parameters vary along th... 详细信息

关键词： Piezoelectric layered structure Functionally graded material(FGM) Love waves Surface acoustic wave(SAW) devices Electro-mechanical coupling factor

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纳米钨合金块体材料的制备

中国稀土学报 2003年第Z1期21卷 52-55页

作者：冉广张中武周敬恩西安交通大学材料科学与工程学院陕西西安710049

高比重钨合金由于具有一系列优异的物理力学性能,因此在航空航天、国防军工和民用中有着广泛的应用前景。采用纳米技术制备高比重钨合金块体材料有望进一步提高其性能,促使其应用。本文分析了纳米钨合金在粉末制备和成型烧结中存在的问... 详细信息

高比重钨合金由于具有一系列优异的物理力学性能,因此在航空航天、国防军工和民用中有着广泛的应用前景。采用纳米技术制备高比重钨合金块体材料有望进一步提高其性能,促使其应用。本文分析了纳米钨合金在粉末制备和成型烧结中存在的问题,并针对纳米钨合金粉末成型和烧结过程中晶粒长大问题以及块体材料中存在大量微孔问题,介绍了数种可行性控制方法。

关键词：纳米材料钨合金制备烧结

Research on a multi-layer piezoelectric structure applied in beam as a sensor

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Research on a multi-layer piezoelectric structure applied in...