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Journal of Materials Science & Technology 2018年第5期34卷 745-755页

作者： V.S.y.Injeti Z.C.Li B.yu R.D.K.Misra Z.H.Cai H.Ding Department of Metallurgical Materials and Biomedical Engineering500 W. University Avenue USA School of Materials Science and Engineering Northeastern University Shenyang 110819 China

This work aims to elucidate the impact of aluminum-content on microstructure and deformation mechanisms of transformation-induced plasticity（TRIP） steels through macroscale and nanoscale deformation experiments combined with post-mortem electron microscopy of the deformed *** solid-state transformation-induced mechanical deformation varied with the Al contents,and influenced tensile strength-ductility *** with 2–4 wt% Al were characterized by TRIP *** contrast to 2 Al-TRIP and 4 Al-TRIP steels,twinning-induced plasticity（TWIP） was also observed in conjunction with strain-induced martensite in 6 Al-TRIP *** behavior is attributed to the increase in stacking fault energy with the increase of Al content and stability of austenite,which depends on the local chemical *** study addresses the knowledge gap with regard to the effect of Al content on austenite stability in medium-Mn TRIP *** combination is expected to potentially enable cost-effective alloy design with high strength-high ductility condition.

关键词： Medium-manganese steels Aluminum content Electron microscopy Mechanical properties Nanoscale deformation TRIP steel Twinning

Regression of liver metastases of occult carcinoid tumor with slow release Lanreotide therapy

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World Journal of Gastroenterology 2005年第13期11卷 2041-2044页

作者： Marta Bondanelli Maria Rosaria Ambrosio Maria Chiara Zatelli Luigi Cavazzini Laura Al Jandali Rifa'y Ettore C.degli Uberti Department of Biomedical Sciences and Advanced Therapies-Section of Endocrinology Department of Experimental and Diagnostic Medicine

Few clinical studies have demonstrated an anti-proliferative activity of somatostatin (SST) analogs in carcinoids. We report the case of a woman with liver metastases of neuroendocrine tumor and no evidence of the primary tumor. The liver metastases were characterized by high proliferation index, immunoreactiviy for somatostatin receptor (SSTR)-l, 2, 3 and 5 and positive octreoscan. Urinary 5-hydroxyindolacetic acid, serum serotonin and chromogranin A were elevated. Slow release lanreotide (SR-LAN) therapy for 3 mo controlled clinical and biochemical signs of carcinoid tumor and caused a clear-cut reduction in the diameter of two liver metastases and disappearance of another lesion, with further reduction after 6 and 18 mo. We demonstrated a clear-cut long-lasting anti-proliferative effect of SR-LAN on liver metastases of occult carcinoid with high proliferation index and immunoreactivity for SSTR-1, 2, 3, and 5. Immunohistochemistry for SSTRs could be a suitable method for the selection of patients with metastatic carcinoid that may benefit from SST analog therapy.

关键词： Carcinoid Somatostatin analogs Somatostatin receptors

First-principles Calculation Assisted Thermodynamic Modeling of Ti-Co-Cu Ternary System

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Journal of Materials Science & Technology 2010年第4期26卷 317-326页

作者： y.J. yang X.M. Tao W.J. Zhu Z.H. Long H.S. Liu Z.P. Jin School of Materials Science and Engineering Central South University Changsha 410083 China Key Lab of Non-ferrous Metal Science and Engineering Ministry of Education Changsha 410081 China

Thermodynamic assessment of Ti-Co-Cu ternary system has been carried out by combining first-principle calculation and CALPHAD method. Firstly, formation enthalpies of stable and hypothesized compounds were calculated by first-principles method. Then, based on reported experimental information, a thermodynamic description of the Ti-Co-Cu ternary system was performed. Solution phases were treated as substitutional solutions of which excess Gibbs energies were formulated by Redlich-kister polynomial, and the intermediate phases were described with sublattice models. All measured isothermal sections were reasonably reproduced. In addition, liquidus projection of this ternary system was further calculated, which may be useful for relevant materials processing.

关键词： First-principle CALPHAD Thermodynamic modeling

Synthesis of Ni-CeO_2 catalyst for the partial oxidation of methane using RF thermal plasma

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Chinese Journal of Catalysis 2016年第5期37卷 743-749页

作者： M.y.Lee J.S.Nam J.H.Seo 韩国全北国立大学应用等离子体工程系韩国全北国立大学量子系统工程系

Ni‐CeO2 catalysts with a nickel content of 50 mol% were prepared using RF thermal plasma, and their catalytic activities for methane partial oxidation were characterized. For the synthesis of Ni‐CeO2 catalysts, a precursor containing Ni（～5‐μm diameter） and CeO2（～200‐nm diameter）powders were heated simultaneously using an RF plasma at a power level of ～52 kVA and a powder feeding rate of ～120 g/h. From the X‐ray diffraction data and transmission electron microscopy images, the precursor formed into high crystalline CeO2 supports with nanosized Ni particles（ 50‐nm diameter） on their surfaces. The catalytic performance was evaluated under atmospheric pressure at 500 °C and a CH4：O2 molar ratio of 2：1 with Ar diluent. Although the Ni content was high（～50 mol%）, the experimental results reveal a methane conversion rate of 70%, selectivities of CO and H2 greater than 90% and slight carbon coking during an on‐stream test at 550 °C for 24 ***, at 750 °C, the on‐stream test revealed the formation of filament‐like carbons with an increased methane conversion rate over 90%.

关键词： RF thermal plasma Methane Partial oxidation Nickel catalyst Ceria Carbon deposition

A perspective on the promoting effect of Ir and Au on Pd toward the ethanol oxidation reaction in alkaline media

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Frontiers in Energy 2018年第4期12卷 501-508页

作者： S.y.SHEN y.G.GUO G.H.WEI L.X.LUO F.LI J.L.ZHANG Institute of Fuel Cells School of Mechanical EngineeringMOE Key Laboratory of Power & Machinery EngineeringShanghai Jiao Tong UniversityShanghai 200240China SJTU-Paris Tech Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China

There remain great challenges in developing highly efficient electrocatalysts with both high activity and good stability for the ethanol oxidation reaction in alkaline media. Herein, two architectures of tri-metallic PdIrAu/C electrocatalysts are designed and the promoting effect of Au and Ir on Pd toward the ethanol oxidation reaction (EOR) in alkaline media is investigated in detail. On the one hand, the tri-metallic Pd Au Ir/C electrocatalyst with a solid solution alloy architecture is less active relative to Pd Ir/C and Pd/C while the stabilizing effect of Au leads to both a higher activity and a lower degradation percentage after 3000 cycles of the accelerated degradation test (ADT) on Pd Au Ir/C than those on Pd Ir/C. On the other hand, the tri-metallic Pd Ir@(1/3Au)/C electrocatalyst with a near surface alloy architecture delivers a much higher activity with an improvement up to 50.4% compared to Pd Ir/C. It is speculated that for the tri-metallic Pd Ir@(1/3Au)/C electrocatalyst, certain Au atoms are well designed on surfaces to introduce an electronic modification, thus leading to an anti-poisoning effect and improving the EOR activity.

关键词： fuel cells catalysts ethanol oxidation alkaline media solid solution alloy near surface alloy

STUDy ON THE FINITE ELEMENT NUMERICAL SIMULATION OF SHEET METAL FORMING

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Acta Metallurgica Sinica(English Letters) 2004年第3期17卷 299-302页

作者： J.L.Song D.J.Hu Z.L.Chang T.y.Li Z.B.Jiang School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200030 China Department of Materials Engineering Taiyuan Heavy Machinery Institute Taiyuan 030024 China

Based on the Finite Element Theory of Rigid Plastic,relevant problems during plas-tic simulation on sheet metal forming were technologically studied and simplified;a simplified model of the blank holder during the drawing process was established and the effects of related parameters on the forming processes were also *** the same time,a finite--element numerical simulation program SPID was *** distribution of strain and relationship of stress--stroke simulated were compared with experimented,the results are well coincided with each *** is verified that the analytical program is reliable.

关键词： sheet metal forming finite-element numerical simulation

Trace element characteristics in the diopsides of peridotite xenoliths: a laser ablation-inductively coupled plasma-mass spectrometry study

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Chinese Science Bulletin 1998年第7期43卷 579-583页

作者： Shaohai Chen Xinghua Zhou S. y. O’Reilly W. L. Griffin Guohui Zhang M. Zhang Chinese Acad Sci Inst Geol Lab Lithosphere Tecton Evolut Beijing 100029 Peoples R China Macquarie Univ Sch Earth Sci GEMOC Sydney NSW 2109 Australia

Among the various xenoliths entrained by the Cenozoic Hannuoba basalts, peridotite is the most abundant one. The trace elements of the diopsides from the peridotite xenoliths were analysed by LA-ICP-MS. The overall depletion and some heterogeneity of the continental mantle beneath northern North China Craton were indicated by the characteristics of the trace elements. The ∑REE amount in diopside correlates with the Cr/(Cr+Al) ratio of diopside which is indicative of xenolith’s partial melting degree. As the peridotite hosts and pyroxenite veins show similar REE distribution patterns, the composite xenoliths are probably formed by mantle deformation, rather than by the late metasomatism of mantle fluids/melts.

关键词： LA-ICP-MS diopside trace elements.

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声学在工业上的一些应用

科学与社会 1985年第Z1期 77-85页

作者： Ignacy Maleki 曾享瑞波兰基本工艺研究所

这个领域的一位专家指出,在工业研究与开发的各个不同部门里,超声波技术在测试与监控方面、在探测刚冒头的裂痕和故障方面广泛应用取得良好效果的情况。同时还谈到这种技术在采矿、冶金、圬工和建筑等方面的一些应用。由此可见,超声在... 详细信息

这个领域的一位专家指出,在工业研究与开发的各个不同部门里,超声波技术在测试与监控方面、在探测刚冒头的裂痕和故障方面广泛应用取得良好效果的情况。同时还谈到这种技术在采矿、冶金、圬工和建筑等方面的一些应用。由此可见,超声在整个工业领域的应用已为期不远了。

关键词：超声波技术超声场特超声波声学脆性材料机械性能力学性质探伤器超声方法声发射信号超声波速度

FRICTION PROPERTIES OF OIL-INFILTRATED POROUS AAO FILM ON AN ALUMINUM SUBSTRATE

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 249-253页

作者： C.X.Jiang J.P.Tu S.y.Guo M.F.Fu X.B.Zhao DepartmentofMaterialsScienceandEngineering ZhejiangUniversityHangzhou310027China／／DeparunentofMechanicalandElectronicEngineeringNanchangUniversityNanchang330029China DepartmentofMaterialsScienceandEngineering ZhejiangUniversityHangzhou310027China DepartmentofMechanicalEngineering ZhejiangInstituteofScienceandTechnologyHangzhou310012China DepartmentofMechanicalandElectronicEngineering NanchangUniversityNanchang330029China

The porous anodic aluminum oxide (AAO) film on a pure aluminum substrate was pre pared by a two-step anodization in a 0.3M oxalic acid solution and pore-enlargem ent treatment in the phosphoric acid aqueous solution at 50℃. The diameter of h ighly ordered pore on the AAO film was about 90nm, and the thickness of the AAO film was 3μm. The mineral oil was infiltrated in the ordered nanometer sized po res of AAO film on an aluminum substrate due to the capillarity effect. The fric tion coefficient was measured using a ball-on-disk tribotester. The tests were c onducted at loads range from 490 to 2450mN and at sliding velocities between 0.1 and 0.5m·s-1. Oil infiltration in porous AAO film modified friction and consid erably improved the wear resistance. As compared to the porous AAO film, the oil -infiltrated specimen had low friction coefficient. With increasing the applied load and sliding velocity, the friction coefficient of the oil-infiltrated film decreased. It indicates that the oil-infiltrated AAO film produced a new way to modify the friction and wear of aluminum alloy.

关键词： friction coefficient oil-infiltrated AAO film aluminum substrate

A Gas Chromatographic Analysis of Light Hydrocarbons on a Column Packed with Modified Silica Gel

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Chinese Chemical Letters 2000年第11期11卷 1019-1022页

作者： Lan X.Z. Zhu D.Q. Wang Q.H. Zhou L.M. Guan y.F. Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116012 China

A one-meter long column packed with silica gel is used to separate light hydrocarbons. The silica gel has been modified with several kinds of gas chromatography stationary phases. Among these, PEG 2000 shows fairly good effect when using 80-100 meshes silica gel for the separation of mixture of methane, ethane, ethylene, acetylene, propane, propylene and n-, i-butane. The different behavior of silica gel between batch to batch is also found. When silica gel is coated with a small amount of Al2O3 prepared with sol-gel method, better resolution has been observed on a 2-meter column compared with the non-modified silica gel.

关键词： Li A Gas Chromatographic Analysis of Light Hydrocarbons on a Column Packed with Modified Silica Gel