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中国有色金属学会会刊：英文版 1999年第S1期9卷 1-12页

作者： p.d.Eason, E.N.Ross, L.A.dempere, and m.J.Kaufman department of materials Science and Engineering, University of Florida, Gainesville, FL 32611 U.S.A.

phase relations in the mo Si C, mo Si Al and mo Si Ti B systems were investigated via sample production, heat treatment and characterization, using light optical microscopy(LOm), scanning electron microscopy(SEm), electron probe microanalysis(EpmA), X ray diffraction(XRd), image analysis, light element analysis, Vickers hardness and fracture toughness measurements. The results led to many signigicant conclusions.

关键词： mo silicides processing microstructure mechanical properties

Nanostructured Graphene Surfaces promote different Stages of Bone Cell differentiation

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Nano-micro Letters 2018年第3期10卷 103-114页

作者： F.F.Borghi p.A.Bean m.d.m.Evans T.van der Laan S.Kumar K.Ostrikov plasma Nanoscience School of Physics The University of Sydney CSIRO manufacturing Brazilian Centre for physics Research (CBpF) School of Chemistry Physics and Mechanical EngineeringQueensland University of Technology CSIRO-QUT Joint Sustainable processes and devices Laboratory Commonwealth Scientific and Industrial Research Organization

Nanostructured graphene films were used as platforms for the differentiation of Saos-2 cells into bonelike cells. The films were grown using the plasma-enhanced chemical vapor deposition method, which allowed the production of both vertically and horizontally aligned carbon nanowalls(CNWs). modifications of the techniqueallowed control of the density of the CNWs and their orientation after the transfer process. The influence of two different topographies on cell attachment, proliferation,and differentiation was investigated. First, the transferred graphene surfaces were shown to be noncytotoxic and were able to support cell adhesion and growth for over 7 ***, early cell differentiation(identified by cellular alkaline phosphatase release) was found to be enhanced on the horizontally aligned CNW surfaces, whereas mineralization(identified by cellular calcium production), a later stage of bone cell differentiation, was stimulated by the presence of the vertical CNWs on the surfaces. These results show that the graphene coatings, grown using the presented method, are biocompatible. And their topographies have an impact on cell behavior, which can be useful in tissue engineering applications.

关键词： Carbon nanowalls Graphene films Bone cell Cell differentiation plasma nanoscience

Rapid Growth of TiNi intermetallic compound within undercooled Ti_(50)Ni_(50)alloy under electrostatic levitation condition

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Journal of materials Science & Technology 2021年第18期77卷 82-89页

作者： p.F.Zou C.H.Zheng L.Hu H.p.Wang School of physical Science and Technology Northwestern Polytechnical University.Xi'an710072China

The undercooling dependence of the solidification mechanism was systematically explored by the electrostatic levitation(ESL)*** the experiments,the maximum undercooling reached up to 406 K(0.26 T_L)and the growth velocity of the primary TiNi phase was in-situ determined at various *** the initial increase of alloy undercooling,the value of growth velocity sluggishly rose followed by a power *** this case,the primary TiNi phase preferentially developed as the equiaxed dendrite,then the remnant liquid participated as Ti_(2)Ni andα-Ti phases on the grain *** the undercooling exceeded the critical value of 350 K,the growth velocity of the primary phase displayed a sharply increase ***,the TEm results demonstrated that the precipitation of the intermetallic Ti_(2)Ni compound was gradually restrained during the rapid solidification and the R-phase existing in the TiNi matrix at large undercooling implied that the martensitic transformation was incomplete.

关键词： Undercooling Ti-Ni alloy Solidification Growth kinetics

High temperature tribological behaviors of aluminum matrix composites reinforced with solid lubricant particles

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Transactions of Nonferrous metals Society of China 2020年第5期30卷 1195-1210页

作者： V.V.mONIKANdAN p.K.RAJENdRAKUmAR m.A.JOSEpH department of production Engineering PSG College of TechnologyCoimbatore 641004TamilnaduIndia department of mechanical Engineering National Institute of TechnologyCalicut 673601KeralaIndia

The AA6061-10 wt.%B4 C mono composite, AA6061-10 wt.%B4 C-Gr(Gr: graphite) hybrid composites containing 2.5, 5, and 7.5 wt.% Gr particles, and AA6061-10 wt.%B4 C-mo S2 hybrid composites containing 2.5, 5, and 7.5 wt.% mo S2 particles were fabricated through stir casting. The dry sliding tribological behaviors of the mono composite and hybrid composites were studied as a function of temperature on high temperature pin-on-disc tribotester against EN 31 counterface. The wear rate and friction coefficient of the Gr-reinforced and mo S2-reinforced hybrid composites decreased in the temperature range of 30-100 ℃ due to the combined lubrication offered by the wear protective layer and its solid lubricant phase. Scanning electron microscopy(SEm) observation of the worn pin surface revealed severe adhesion, delamination, and abrasion wear mechanisms at temperatures of 150, 200, and 250 ℃, respectively. At 150 ℃, transmission electron microscopy(TEm) observation of the hybrid composites revealed the formation of deformation bands due to severe plastic deformation and fine crystalline structure due to dynamic recrystallization.

关键词： aluminum hybrid composites high temperature tribological behavior solid lubrication deformation band dynamic recrystallization

percutaneous cryosurgery for the treatment of hepatic colorectal metastases

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Percutaneous cryosurgery for the treatment of hepatic colore...

Experimental investigation of laser surface processing of flexure silicon nitride ceramic

中国中西医结合第十九次全国消化病学术会议暨国家级中西医结合消化疾病新进展学习班

作者： Kecheng Xu m.d. Lizhi Niu m.d. ph.d. Weibing He m.d. Yisong He m.d. Jiansheng Zuo m.d.

Background The purpose of this study was to determine the safety and efficacy for the treatment of patients with hepatic colorectal metastases. methods From 852 patients with different types of liver tumors treated by cryosurgery in a 5-year period,the authors evaluated the results of 326 patients with nonresectable hepatic colorectal *** was performed under the guidance of ultrasound or CT

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中国有色金属学会会刊：英文版 2006年第B02期16卷 558-565页

作者： SUN Li A. p. mALSHE JIANG Wen-ping p. H. mCCLUSKEY department of mechanical Engineering University of Arkansas Fayetteville AR 72701 USA Technology ＆ Solutions division Caterpillar Inc. Peoria IL 61629 USA

A continuous wave carbon dioxide (CO2) laser (λ=10.6μm) was employed to treat the surface of Si3N4 mOR (modulus of rupture) bars. The effects of the CO2 laser process on physical and mechanical properties of ground Si3N4 samples were investigated. Scanning electron microscopy (SEm) analysis shows that the area occupied by cavities and fracture is decreased by about 49.4% after laser treatments. Cross-sectional metallography results indicate that the secondary YSiAlON phase in the Si3N4 ceramic is softened/melted and flowed into the defects. Four-point bending tests show that the flexural strength of the treated samples is improved to 10.9%. Fractographic analysis show that the fracture origins move from the surface to subsurface. It is concluded that laser surface processing have significant effects on fracture behavior of flexure Si3N4 ceramic.

关键词：氮化硅陶瓷激光表面处理实验研究挠曲强度物理性质

decarbonising energy: The developing international activity in hydrogen technologies and fuel cells

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Journal of Energy Chemistry 2020年第12期29卷 405-415页

作者： John meurig Thomas peter p.Edwards peter J.dobson Gari p.Owend department of materials Science&metallurgy University of CambridgeCambridge CB30FSUK King Abdulaziz City for Science and Technology(KACST)-Oxford Centre of Excellence in petrochemicals and Inorganic Chemistry Laboratory University of OxfordOxford OX13QRUK The Queen’s College University of OxfordOxford OX14AWUK Annwvyn Solutions(Independent Consultant) BromleyKent BR13DWUK

Hydrogen technologies and fuel cells offer an alternative and improved solution for a decarbonised energy *** cells are electrochemical converters;transforming hydrogen (or energy sources containing hydrogen) and oxygen directly into *** hydrogen fuel cell,invented in 1839,permits the generation of electrical energy with high efficiency through a non-combustion,electrochemical process and,importantly,without the emission ofits point of ***,despite numerous efforts to exploit the obvious attractions of hydrogen technologies and hydrogen fuel cells,various challenges have been encountered,some of which are reviewed ***,however,given the exigent need to urgently seek low-carbon paths for humankind’s energy future,numerous countries are advancing the deployment of hydrogen technologies and hydrogen fuel cells not only for transport,but also as a means of the storage of excess renewable energy from,for example,wind and solar ***,hydrogen is also being blended into the natural gas supplies used in domestic heating and targeted in the decarbonisation of critical,large-scale industrial processes such as steel *** briefly review specific examples in countries such as Japan,South Korea and the people’s Republic of China,as well as selected examples from Europe and North America in the utilization of hydrogen technologies and hydrogen fuel cells.

关键词： decarbonisation Hydrogen Energy Hydrogen Economy Fuel cells Environment Sustainability

disaster Risk Governance as Assemblage: The Chilean Framework of the 1985 San Antonio Earthquake

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International Journal of disaster Risk Science 2022年第6期13卷 878-889页

作者： daniela p.González Architecture and Urban Studies Pontifcal Catholic University of Chile7520245 SantiagoChile

The purpose of this article is to analyze disaster risk governance through assemblage theory, identifying how-during the altered political context of a military regime with a centralized disaster risk management as in the case of Chile in 1985-new actors emerge during the disaster response phase as a de/reterritorialization effect that is influenced by their agencies and relationships, disfiguring the edges of the assemblage. Based on this conceptualization, it is possible to investigate the interactions between the different actors, their power relations, and their reconfigurations in the governance exercise. For this purpose, we reviewed the response phase of the 1985 San Antonio earthquake that affected the central zone of Chile, where strategic functions, institutions, and forms of power are *** describe and visualize the actors during the response phase in the disaster risk governance framework, a map of actors was developed that identifies the existing relationships and their different weights. The central scale proved to be dominant and occupied a political space that was transfigured by its overrepresentation-enforced by allies such as the banking system and business associations-enhancing a neoliberal agenda. The leaps in scale from the central scale to the local scale cancel agency of the last, destabilizing its capacity to deal with the effects of the earthquake and isolating it from the decision-making processes. Consequently,delays in providing aid demonstrate that authoritarian governments do not provide better management in the disaster response phase.

关键词： Assemblage Chile disaster response phase disaster risk governance San Antonio earthquake

Achieving accuracy and efficiency at the same time: a new kinetic monte Carlo approach for complicated catalytic systems

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Science China Chemistry 2018年第12期61卷 1479-1480页

作者： Yu mao p.Hu School of Chemistry and Chemical Engineering The Queen's University of Belfast

Rational design/screening of more active,more selective,and less expensive catalysts has long been an important target in heterogeneous catalysis [1].In recent decades,the advances of density functional theory (dFT)calculations allow us to theoretically evaluate the activity of *** shown in Figure 1(a),kinetics serves as the link between the atomic-scale properties obtained by dFT and turnover frequency (TOF)of catalysts.

关键词： Achieving accuracy efficiency kinetic monte Carlo complicated catalytic systems