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Journal of Materials Science & Technology 2020年第19期54卷 171-180页

作者： Mei Rao Guoqiang Luo Jian zhang Yiyu Wang Qiang Shen lianmeng zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN37831-6064USA

The 93 W and Mo1 refractory metals were bonded with different Cu_(1-x)Ni_(x) coating interlayers of various Ni content using plasma-activated sintering at 700℃.The effects of the Ni content in the Cu_(1-x)Ni_(x) coating interlayer on the interfacial microstructure evolution and mechanical properties of the W/Mo joints were *** maximum average shear strength of the W/Mo joint was 316.5 MPa when the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was 25%.When the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was below 50%,the atomic diffusion at the W/Mo joint interface was adequate without the formation of intermetallic compounds,as demonstrated by the High Resolution Transmission Electron Microscope analyses of the *** presence of Ni in Cu_(1-x)Ni_(x) promoted diffusion bonding at the interface,which contributed to the high mechanical properties of the W/Mo *** an increase in the Ni content of the Cu_(1-x)Ni_(x) coating interlayer,the Mo Ni intermetallic compound(IMC)nucleated and grew at the Cu1-xNix coating/Mo1 *** the Ni content of the Cu_(1-x)Ni_(x) coating interlayer was above 50%,the generation of a brittle Mo Ni IMC weakened the shear strength of the W/Mo joint dramatically.

关键词： Refractory metal Cu_(1-x)Ni_(x)coating interlayer Solid solution MoNi IMC Microstructure Shear strength

Densification of W-Ni-Cu and W-Fe-Cu Alloys at 1573 K

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Journal of Materials Science & Technology 1999年第1期15卷 94-96页

作者： Xiong, Huaping zhang, lianmeng Shen, Qiang Yuan, Runzhang Wuhan Univ Technol State Key Lab Mat Synth & Proc Wuhan 430070 Peoples R China

The tungsten alloys with Ni-Cu and Fe-Cu additives were sintered at 1573 K for 1 h by hot-pressing method. It was found that the alloy relative density can be improved with the addition of Cu when Cu content is not very high, and W95Ni3Cu2 alloy with full density can be obtained Under the sintering condition. However, with the Cu content further increasing, the relative density change of W-Ni-Cu alloy and W-Fe-Cu alloy shows different trends, the former tends to decrease obviously, but the latter shows little change. According to the analysis results, the element Cu has different effects on the activation capability of Ni and Fe during sintering of the tungsten alloys. (Edited author abstract) 7 Refs.

关键词： Tungsten alloys

The Structure and Properties of Multi-cations Doped KNN-based Piezoelectric Ceramics

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Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 261-266页

作者： GAO Xiaoyi SUN Huajun HAO Hua WANG Chuanbin SHEN Qiang zhang lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan430070China

The piezoelectric strain of K_(0.5)Na_(0.5)NbO_(3)-based lead-free ceramic at different temperatures was *** Rayleigh analysis shows that the intrinsic and extrinsic contributions are increased at temperature from 173 to 298 *** addition,a monoclinic phase structure was observed at 83 *** results of phase field simulation show that the temperature dependent microstructure evolution is a function of the local structure *** work contributes to understanding the structure and properties relationship of the multi-cations doped KNN-based piezoelectric ceramics as a function of temperature.

关键词： microstructure evolution phase structure monoclinic phase strain behavior

Morphologies and Mechanical Properties of Unsaturated Polyester Resin Modified with TDI

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 460-462页

作者： DUAN Huajun zhang lianmeng WANG Jun YANG Xiaoli School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The morphology, mechanical properties of unsaturated polyester（UP） resin modified with TDI were studied via dynamic FT-1R spectra, SEM, DMA and mechanical property testing. Results show that companying with the cured cross-linking reaction of UP resin, TDI can firstly react with UP and produce polyurethane（PU）, and then UP and PU form the cross-linking nets together. The impact fracture section morphology of modified UP resin manifested the typical sea- islands structure. Testing of mechanical properties showes that for introducing of PU, the TDI has an obvious effect on the toughness and strength of UP resin. When the ratio of TDI/UP （w/w） was 7.5%, the modified UP resin exhibited the best mechanical properties with flexural strength of 125 MPa, impact strength of 18 kJ·m^-2 and tensile strength of 72 MPa.

关键词： modified unsaturated polyester TDI morphology toughness mechanical properties

Infl uencing Mechanism and Interaction of Muscovite on Thermal Decomposition of Ammonium Polyphosphate

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Journal of Wuhan University of Technology(Materials Science) 2016年第2期31卷 334-339页

作者：胡盛 CHEN Fei LI Junguo 沈强 zhang lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070 China School of Chemical and Environment Engineering Hubei University for Nationalities Enshi 445000 China

The interaction mechanism and phase evolution of ammonium polyphosphate（APP）mixed with muscovite（APP/muscovite）were studied by TG,XRD and SEM,respectively,during *** the temperature is not higher than 300 ℃,muscovite has no effect on the thermaldecomposition of APP,and the initialdecomposition temperature of APP/muscovite at 283 ℃ is basically the same as the APP at 295 ℃,and the main thermaldecomposition products are polyphosphoric acid and NH_4H_2PO_4 at 300 ℃.The polyphosphoric acid,the decomposition products of APP,can enable K and Siout of muscovite and interact with muscovite chemically to generate Al_2O_3·2SiO_2,α-SiO_2 and phosphates（AlPO_4 and K_5P_3O_（10））compounds during 400 ℃-800 ℃,which own obvious adhesive phenomenon and porous structure with the apparent porosity of 58.4%.Further reactions between phosphates other than reactions among Al_2O_3·2SiO_2 and α-SiO_2 can generate KAlP_2O_7 at 1 000 ℃ and the density of residualproduct is improved by low melting point phosphate filling pore to form relatively dense structure and decrease the apparent porosity to 44.4%.The flame resistant and self-supported ceramic materials are expected to enhance the fire-retarding synergistic effect between APP and muscovite.

关键词： ammonium polyphosphate(APP) muscovite thermal decomposition influencing mechanism interaction

Morphology Study of Oriented Sm BCO Film Deposited by MOCVD

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Journal of Wuhan University of Technology(Materials Science) 2016年第1期31卷 15-19页

作者：汪婷涂溶 KE Wang zhang Song zhang lianmeng Takashi GOTO State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Institute for Materials Research Tohoku University Sendai 980-8577 Japan

c-axis-oriented SmBa2Cu3O7（SmBCO） films have been deposited on（100）- LaA1O3（LAO）substrate by metal organic chemical vapor deposition（MOCVD） *** effects of deposition temperature（T（dep）） and total pressure（P（tot）） on the orientation and microstructure of SmBCO films were *** orientation of SmBCO films transformed from α-axis to c-axis with increasing of T（dep） from 900 to 1 100℃.At T（dep）=1 050℃,SmBCO films had c-axis orientation and tetragon *** P（tot）^（dep）=400-800 Pa and T（dep）=1 050 ℃,totally c-axis-oriented SmBCO films were *** R（dep） of SmBCO films increased firstly and then decreased with increasing P（tot）.The surface of SmBCO films exhibited tetragon morphology at 1 050 ℃ and400 *** thickness of SmBCO film deposited was 1.2μm at P（tot）= 600 Pa,and the corresponding R（dep）was 7.2 μm·h^（-1）.

关键词： SmBCO film MOCVD orientation morphology

The Formation Mechanism and Control Methods of High Temperature Infrared Radiant Coating Defects

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1091-1095页

作者： YE Jing LAN Helong WANG Chuanbin LUO Guoqiang zhang lianmeng School of Materials Science and Engineering Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Using high aluminum refractory material as substrate at 1400℃, we studied the connections between several oxides such as Fe203, MnOv CuO, and the formation of defects such as coating crack, exfoliation, blistering, erosion, and fading away appeared in the application of high temperature infrared radiation coating. Analyses showed that thermal stress formed during the heating process due to the thermal expansion coefficient differential between the coating and the substrate, and volume effect caused by the crystal transferred when the temperature changed, which resulted in the coating crack and exfoliation. The gas produced by the reactions between components and binder or the components themselves during the heating process caused the coating blistering. The EMPA and XRD analyses show that oxides with low melting point in the penetrating area of the substrate may form eutectic with low melting point and produced thermal defects, which leads to the erosion by penetrating to the substrate. The valent changes of Fe2O3 and MnO2 during the heating process cause the volatilization of the oxides or the pulverization of the coatings, resulting in the coating fades away easily at high temperature for a long time.

关键词： infrared radiation coating defects at high temperature mechanism control

Preparation and Microstructure of Porous ZrB_2 Ceramics Using Reactive Spark Plasma Sintering Method

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Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 512-515页

作者：袁辉平李俊国 SHEN Qiang zhang lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Beijing Glass Research Institute

Zirconium oxide （ZrO：） and boron carbide （B4C） were added to ZrB2 raw powders to prepare ZrB2 porous ceramics by reactive spark plasma sintering （RSPS）. The reactions between ZrO2 and B,C which produce ZrB2 and gas （such as CO and B2O3） result in pore formation. X-Ray Diffraction results indicated that the products phase was ZrB2 and the reaction was completed after the RSPS process. The porosity could be controlled by changing the ratio of synthesized ZrB2 to raw ZrB2 powders. The porosity of porous ceramics with 20 wt% and 40 wt% synthsized ZrB2 are 0.185 and 0.222, respectivly. And dense ZrB：SiC ceramic with a porosity of 0.057 was prepared under the same conditions for comparison. The pores were homogeneously distributed within the microstructure of the porous ceramics. The results indicate a promising method for preparing porous ZrB：based ceramics.

关键词： zirconium diboride porous ceramic reactive spark plasma sintering

Catalytic Decomposition of Nitric Oxide by LaCoO3 Nano-particles Prepared by Rotary CVD

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Journal of Wuhan University of Technology(Materials Science) 2018年第2期33卷 368-374页

作者：徐鹏涂溶 zhang Song YANG Meijun LI Qizhong GOTO Takashi zhang lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Institute for Materials Research Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan

Catalytic direct decomposition of NO by perovskite-type catalysts has attracted much attention for the various possible components and the unique structure. LaCoO_3 nanoparticles were precipitated on a-Al_2O_3 micro powders by rotary chemical vapor deposition（rotary CVD） and its catalytic performance for the decomposition of NO was investigated. LaCoO_3 nano-particles with 100 nm in average diameter and 1.5% in mass were uniformly dispersed on a-Al_2O_3 powder. The conversion of NO increased with increasing temperature from 400 to 950 ℃, and reached 28.7% at 950 ℃. The gas velocity of transformed NO on LaCoO_3 nano-particles catalyst per mass unit was 7.7 mL/（g min）, showing a good catalytic activity over the calculated results of pure catalysts. After five times of aging performance experiments, the NO conversion kept the same value, showing a good aging performance and thermal stability.

关键词： rotary chemical vapor deposition LaCoO3 nano-particles NO decomposition catalyst

Comprehensive Optimization of Electrical and Optical Properties for ATO Films Prepared by Pulsed Laser Deposition

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Journal of Wuhan University of Technology(Materials Science) 2016年第1期31卷 20-26页

作者： SHEN Qiang YANG Ping LI Na LI Meijuan 陈斐 zhang lianmeng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Department of Chemical Engineering and Materials Science University of California

Antimony doped tin oxide（ATO） thin films have been prepared by pulsed laser deposition（PLD） *** intrinsic effect of Sb dopant,including the Sb content,transition degree between Sb（3＋） and Sb（5＋） and crystallinity on the electrical and optical properties of the ATO thin films is mainly *** is suggested that the transition degree of Sb（3＋） towards Sb（5＋）（Sb（5＋）/Sb（3＋） ratio） is determined by Sb *** the Sb content is increased to 12 at%,the Sb（5＋）/Sb（3＋） ratio reaches the highest value of 2.05,corresponding to the resistivity of 2.70×10（-3） Ω·***,the Burstein-Moss effect caused by the increase of carrier concentration is observed and the band gap of the ATO thin films is broadened to 4.0 eV when the Sb content is increased to 12 at%,corresponding to the highest average optical transmittance of 92%.Comprehensively considering the combination of electrical and optical properties,the ATO thin films deposited with Sb content of 12 at%exhibit the best properties with the highest ＂figure of merit＂ of 3.85×10（-3） Ω（-1）.Finally,an antimony selenide（Sb_2Se_3） heterojunction solar cell prototype with the ATO thin film as the anode has been prepared,and a power conversion efficiency of 0.83%has been achieved.

关键词： antimony doped tin oxide pulsed laser deposition Sb content Sb_2Se_3 solar cell