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工业CT在C/C复合材料无损检测中的应用

新型炭材料 1998年第2期13卷 25-28页

作者：徐惠娟黄启忠中南工业大学粉末冶金国家重点实验室

针对Ｃ／Ｃ复合材料的结构特点及工业ＣＴ独特的技术，采用工业ＣＴ技术对Ｃ／Ｃ复合材料的无损检测进行了研究，结果表明：工业ＣＴ技术能够有效地检测出Ｃ／Ｃ复合材料中的各种缺陷。

关键词：工业CT 复合材料无损检测碳纤维增强材料

Polythiophene Derivative with Octyl Diphenylamine-vinylene Side Chain:Synthesis and its Applications in Field-Effect Transistors and Solar Cells

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Polythiophene Derivative with Octyl Diphenylamine-vinylene S...

中国化学会第27届学术年会

作者： Haijun Tan,1 Ping Ding,1 Bo Peng,1,2 Yunqi Liu,2Yuehui He,3 Chunyue Pan,1*Yingping Zou1 1College of Chemistry and Chemical Engineering, central south university, changsha410083. 2Beijing National laboratory for Molecular Sciences, key laboratory of Organic Solids,Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, 3state key laboratory for powder metallurgy, central south university, changsha 410083

＜正＞A new polythiophene derivative with octyl diphenylamine-vinylene conjugated side chain, DPAV-PT, was synthesized by the Stille coupling reaction, and characterized by 1H

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Genetic and epigenetic etiology of Parkinson diseases

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Genetic and epigenetic etiology of Parkinson diseases

2012年海内外华人神经科学会议

作者： Zhuo-Hua Zhang~* The state key laboratory of Medical Genetics Xiangya Medical School central south university changsha Hunan china.

＜正＞Parkinson’s disease（PD） is the most common neurodegenerative movement *** pathological hallmarks of PD are loss of dopaminergic neurons in substantia nigra compacta（SNc） of midbrain and formation of intracellular aggregate Lowy bodies. Majority of PD patients are ***,about 10%PD cases are *** genetic studies of familial cases result in identification of causative mutations in multiple *** analysis of these PD linked genes has provided important insight into the disease pathogenic ***,the etiology of sporadic PD remains largely *** long-term research goal is to reveal the molecular mechanism of *** hypothesize that both genetic and environmental factors play important roles in PD pathogenesis and that the environmental factors regulate PD genesis and progression via at least partially epigenetic mechanism. Based on the hypothesis,our research focus includes to elucidate the pathophysiological function of PD linked genes and their pathogenic mutants and to identify the epigenetic changes associated with *** results suggest that PD-linked parkin,PINK1,and DJ-1 form a functional E3 ligase complex to promote ubiquitination and proteasomal degradation ofun/misfolded *** of the E3 ligase complex is regulated by nedd8 modification of both parkin and *** identify PD-associated epigenetic modification,we have performed genome-wide methylation sequencing of brain tissue DNAs from 5 PD patients and their matched *** reveal hypermethy lation of 234 genes in PD brain tissues over their *** 30%of these genes are related to *** vitro studies show that cells treated with sub-lethal dosage of PD neurotoxin MPP+ results in reduced expression of genes in neurogenesis pathway in addition to increased expression of immune related genes and cell death related genes. The study provides to our knowledge the first evidence of linking epigenetic

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Numerical Simulation of powder Injection Molding Filling Process Based on ANSYS

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Numerical Simulation of Powder Injection Molding Filling Pro...

The Fourth International Conference on Physical and Numerical Simulation of Materials Processing (ICPNS’2004)

作者： Zhoushun ZHENG, Xuanhui QU, Yunping LI and Jianfeng GUO National key Lab for powder metallurgy, central south university, changsha, 410083,P.R.china Department of Applied Mathematics and Applied software, central south university, changsha, 410083, P.R.china School of Materials Science and Engineering, university of Science and Technology Beijing, Beijing, 100083, P.R.china

A mathematical model of two-dimensional flows of PIM derived from the momentum, continuity equations and the heat transfer equation is obtained. The formula of calculating the flow conductance and the pressure equation are deduced when the no slip boundary condition is employed at the wall, and the pressure equation is a no-linear elliptic partial differential equation. The flow front locations, distribution of velocities, temperature and pressure are simulated by the finite element analysis software ANSYS. Simulation results indicate that it is in the final filled part that defects appear easily. The region in which the defects may occur during the PIM process can be predicted.

关键词： Numerical simulation powder injection molding Mathematical model ANSYS

Zr_(55)Al_(10)Ni_5Cu_(30)大块非晶合金的研究进展

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稀有金属与硬质合金 2004年第1期32卷 36-39,45页

作者：黄劲松中南大学粉末冶金国家重点实验室湖南长沙410083

概述了Zr55Al10Ni5Cu30非晶合金的制备方法及各种方法的特点,并在此基础上介绍了Zr55Al10Ni5Cu30的组织与性能及其晶化过程。

关键词：锆非晶组织性能晶化

镍铜总量对液相烧结Mo-W-Ni-Cu合金性能的影响

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稀有金属与硬质合金 1999年第2期27卷 7-10,11页

作者：袁国洲中南工业大学粉末冶金国家重点实验室

研究了镍铜总量对液相烧结ＭｏＷＮｉＣｕ合金性能的影响。结果发现，在镍铜比一定时，随镍铜总量的增加，烧结温度下降；抗拉强度σｂ先是急剧地上升，上升到最大值１１００ＭＰａ后缓慢地下降；烧结硬度在镍铜总量不超过６％时... 详细信息

研究了镍铜总量对液相烧结ＭｏＷＮｉＣｕ合金性能的影响。结果发现，在镍铜比一定时，随镍铜总量的增加，烧结温度下降；抗拉强度σｂ先是急剧地上升，上升到最大值１１００ＭＰａ后缓慢地下降；烧结硬度在镍铜总量不超过６％时保持最高值ＨＢ３７０左右，超过６％后硬度下降；

关键词：液相烧结镍铜总量粘结相钼合金性能

Experimental investigation and thermodynamic calculation of the Fe-Mg-Mn system

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Experimental investigation and thermodynamic calculation of ...

第十四届全国相图会议暨国际相图与材料设计研讨会

作者： P.S.Wang J.R.Zhao L.J.Zhang S.H.Liu H.H.Xu Yong Du C.Y.He state key laboratory of powder metallurgy central south university changsha Hunan 410083 P.R.china

＜正＞On the basis of several investigations on the Fe-Mg-Mn system,a thermodynamic calculation was conducted for the Fe-Mg-Mn system by extrapolating from the three binary *** calculated isothermal sections at 500 and 800oC are compared with those reported in the *** order to confirm these calculations, 5 decisive alloys are *** annealed alloys are subjected to X-ray diffraction and scanning electron *** can be clearly seen that the presently calculated isothermal sections at 500 and 800oC are in excellent agreement with the experimental data.

关键词： Fe-Mg-Mn system thermodynamic modeling X-ray diffraction scanning electron microscopy

La-Y对纳米级W-Ni-Fe复合粉末制备的影响

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中国稀土学报 2004年第4期22卷 463-466页

作者：马运柱黄伯云范景莲熊翔魏定池汪登龙中南大学粉末冶金国家重点实验室湖南长沙410083

以喷雾干燥法制备的(W,Ni,Fe)复合氧化物粉末为原料,采用700℃,保温90min的条件进行还原,研究了La-Y含量对还原制备纳米级W—Ni—Fe复合粉末特性的影响;采用XRD及高倍SEM分别对所制备的复合粉末进行了物相分析、晶粒尺寸测试和形貌观察... 详细信息

以喷雾干燥法制备的(W,Ni,Fe)复合氧化物粉末为原料,采用700℃,保温90min的条件进行还原,研究了La-Y含量对还原制备纳米级W—Ni—Fe复合粉末特性的影响;采用XRD及高倍SEM分别对所制备的复合粉末进行了物相分析、晶粒尺寸测试和形貌观察;并对所制得复合粉末的Fsss粒度、比表面进行了测定与分析。研究结果表明:不加La-Y时还原粉末由W和γ-(Ni,Fe)两相组成,添加一定量La—Y的还原粉末有W,γ-(Ni,Fe),Y(Ni0.75W0.25)O3和La(Ni0.75W0.25)O3四相组成;当La.Y的质量分数在0～0.8％范围时(占90W-7Ni-3Fe复合粉末的质量分数),随着La—Y含量的增加,粉末dBET粒度由96.6降到50.3 nm,粉末Fsss粒度由0.64降到0.33 μm,粉末晶粒尺寸由26.1降到22.2 nm;未添加La-Y时粉末颗粒为球形,添加一定量的La-Y,粉末颗粒变为近球形或多面体;添加一定量的La—Y不仅可以有效地抑制晶粒长大,还可以在一定程度上提高粉末的分散性。

关键词：材料学 W-Ni-Fe复合粉末纳米级粉末氢还原稀土

First-principles study of the(Cu_xNi_(1-x))_3 Sn precipitations with different structures in Cu–Ni–Sn alloys

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Chinese Physics B 2018年第8期27卷 423-433页

作者： Guang-Wei Peng Xue-Ping Gan Zhou Li Ke-Chao Zhou Stalte key Laborattory of powder metallurgy Centra south university Changsha 410083Chin Humm Automottve Engineering Vocaitiomll College Zhtlzhou 4 12001Chitin School of Matcrials Science and Engineering Cwntrat South UniversityChangsha 410083 China

The structural parameters, the formation energies, and the elastic and thermodynamic properties of the （CuxNi1-x）3Sn phase with different structures are studied by the virtual crystal approximation （VCA） and super-cell （SC） methods. The lattice constants, formation energies, and elastic constants obtained by SC and VCA are generally consistent with each other. It can be inferred that ttle VCA method is suitable for （CuxNil ,）3Sn ordered phase calculation. The calculated results show that the equilibrium structures of Cu3Sn and Ni3Sn are D0a and D019 respectively. （CuxNi1-x）3Sn D03 with various components are the mctastable phase at temperature of 0 K, just as D022 and L I2. With the temperature increase, tile free energy of the D03 is lower than those of D022 and L12, and D022 and L12 eventually turn into D03 in tile aging process. The （CuxNi1-x）3Sn D022 is first precipitated in a solid solution because its structure and cell volume are most similar to Ihose of a solid solution matrix. The LI2 and the D022 possess better mechanical stability than the D03. Also, they may play a more important role in the strengthening of Cu-Ni-Sn alloys. This study is valuable lk）r further research on Cu-Ni-Sn alloys.

关键词： (CuxNi1-x)3Sn, first-principle virtual crystal approximation super-cell