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Progress in Natural science:materials International 2011年第3期21卷 262-267页

作者： ming song,yue ma,sheng-kai gong key laboratory of aerospace materials and performance(Ministry of Education), school of materials science and engineering,beihang university,beijing 100191,china key laboratory of aerospace materials and performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing 100191 China

Based on the study of the radial residual stress distribution on the macro curved interfaces of thermal barrier coating system(TBCs) for the hollow curved substrate structures,the hollow four-concentric-circle model was *** the concentric-circle model with a fine scaled sinusoidal interface was proposed to describe the stresses distribution on the rough interface of TBCs with macro curved *** influences of the geometric and thermophysical parameters were discussed by the developed *** results showed that the radial stress on the rough interface can be separated into two sections:the overall level stress from macro surface curvature and the local stress from local asperity of the *** overall level stress was determined by the thicknesses and the thermophysical parameters of each *** has been found that the ratio of local stress and overall level stress was influenced by the interface asperity,the ratio of elastic modulus and the ratio of thermal expansion coefficients of the layers beside the rough ***,the convex macro curvature of the substrate can induce tensile stress onto the *** at the sharp corners of the substrate,the small curvature radius can cause high stress which should be taken more care about the occurrence of spalling cracking at interface

关键词： barrier coating system(TBC) residual stress interface asperity thermal grown oxide(TGO) concentric-circle model

Inter-phase selective corrosion of γ-TiAl alloy in molten salt environment at high temperature

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Progress in Natural science:materials International 2011年第4期21卷 322-329页

作者： Wen-yue ZHAO,Bo-wen XU,yue ma,sheng-kai gong key laboratory of aerospace materials and performance(Ministry of Education), school of materials science and engineering,beihang university,beijing 100191,china key laboratory of aerospace materials and performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing 100191 China

Hot corrosion behavior of Ti-48Al-2Cr-2Nb alloy in molten salt environment of 75%Na2SO4and 25%NaCl(mass fraction) at 800℃was studied using oxidation kinetics analysis,scanning electron microscopy,X-ray energy dispersive and X-ray diffraction *** inter-phase selective corrosion,which caused the corrosion pits initiated from lamellar interfaces and the preferential corrosion ofα2phases,was observed during the hot corrosion of the *** common controls of thermodynamic and kinetics in corrosion reactions with fluxing and active oxidation process were considered the essential hot corrosion mechanisms of the ***,lamellar refinement was proved to be an effective way to mitigate the inter-phase selective corrosion of the alloy in molten salts.

关键词： hot corrosion TiAl-based alloy inter-phase selective corrosion molten salts

Surface recrystallization of a Ni_3Al based single crystal superalloy at different annealing temperatures and blasting pressure

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Rare Metals 2012年第3期31卷 209-214页

作者： WU Yuxiao a, YANG Ruibo a, LI Shusuo a, ma yue a, gong shengkai a, and HAN Yafang a, b a key laboratory of aerospace materials and performance (Ministry of Education), school of materials science and engineering, beijing university of Aeronautics and Astronautics, beijing 100191, china b beijing Institute of Aeronautical materials, beijing 100095, china key laboratory of aerospace materials and performance (Ministry of Education) School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing China beijing Institute of Aeronautical materials Beijing China

The effects of annealing temperature and grit blasting pressure on the recrystallization behavior of a Ni3Al based single crystal superalloy were studied in this work. The results show that the precipitation of the Y-NiMo phase occurs at 900 and 1000 °C, which precedes recrystallization. The initial recrystallization temperature was between 1000 and 1100 °C. Cellular recrystallization was formed at 1100 and 1200 °C, which consisted of large columnar γ′ and fine γ + γ′. The dendrite arm closed to the interdendritic region may act as nucleation sites during initial recrystallization by a particle simulated nucleation mechanism at 1280 °C. The size of the grains first turned large and then became small upon the pressure while the recrystallization depth increased all the time.

关键词： recrystallization temperature pressure Ni3Al based single crystal superalloy nucleation

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Phase equilibria,diffusion growth and diffusivities in Ni-Al-Pt system using Pt/β-NiAl diffusion couples

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Progress in Natural science:materials International 2011年第3期21卷 221-226页

作者： Wei-yan gong~1,Li-jun ZHANG~2,Hai-xia WEI~1,Chun-gen ZHOU~1 1.key laboratory of aerospace materials and performance,Ministry of Education, school of materials science and engineering,beihang university,beijing 100191,china 2.Interdisciplinary Centre for Advanced materials Simulation,Ruhr-Universitat Bochum, 44801 Bochum,Germany [a] key laboratory of aerospace materials and performance Ministry of Education School of Materials Science and Engineering Beihang University Beijing 100191 China [b] Interdisciplinary Centre for Advanced materials Simulation Ruhr-Universit?t Bochum 44801 Bochum Germany

The phase equilibria,diffusion growth and diffusivities in the Ni-Al-Pt system at 1 150,1 200 and 1 250℃were studied using Pt/β-NiAl diffusion *** on the measured concentration profiles coupled with the local equilibrium hypothesis,the tie-lines between neighboring phases were *** intermediate phases,Pt3Al andα-NiPt（Al）,are found to develop between the Pt andβ-NiAl *** thicknesses of Pt3Al andα-NiPt（Al） layers varies linearly with the square of annealing time, indicating that the growth of Pt3Al andα-NiPt（Al） are *** calculated Arrhenius equations of the parabolic growth constants,k,for the Pt3Al andα-NiPt（Al） phases are obtained,*** average ternary inter-diffusivities of the Pt3Al andβ-NiAl phases at different temperatures are determined from an integration of inter-diffusion fluxes calculated directly from the experimental concentration profiles.

关键词： platinum group nickel aluminides phase equilibria thermodynamic diffusion

manufacturing process of water-soluble salt-based ceramic cores based on vat photopolymerization

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Journal of Advanced Ceramics 2024年第5期13卷 652-665页

作者： Yuzhen Zhang Wenyan Duan yue Gu Xingyao Sun Shan Li Bingshan Liu gong Wang key laboratory of Space manufacturing Technology(SMT) Technology and Engineering Center for Space UtilizationChinese Academy of SciencesBeijing 100094China university of Chinese Academy of sciences Beijing 100049China Ministry of Education key laboratory for Cross-Scale Micro and Nano manufacturing Changchun University of Science and TechnologyChangchun 130022China

Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical *** this work,vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for the first *** powder raw materials of the printing suspension were sodium chloride and ***-precision green bodies were manufactured by optimizing suspensions and *** addition,the postprocessing method was optimized according to the microstructure and mechanical *** sintered part had a high bending strength and smooth ***,the dissolution rate and moisture resistance were compared under different dissolution and storage *** to traditional manufacturing methods,vat photopolymerization enables the production of complex structures without molds and reduces production *** technology is suitable for the rapid iteration of complex structural parts and can be applied to precision parts in aerospace,military,and other technical fields with high cost-effectiveness and sustainability.

关键词： vat photopolymerization water-soluble salt-based ceramic cores defect formation control accuracy moisture rate

Exploring the mechanisms of calcium carbonate deposition on various substrates with implications for effective anti-scaling material selection

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Petroleum science 2024年第4期21卷 2870-2880页

作者： Lu gong Fei-Yi Wu ming-Fei Pan Jun Huang Hao Zhang Jing-Li Luo Hong-Bo Zeng College of science China University of Petroleum beijing key laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum Basic Research Center for Energy Interdisciplinary College of Science China University of Petroleum Department of Chemical and materials engineering University of Alberta key laboratory of High Efficiency and Clean Mechanical manufacture (Ministry of Education) School of Mechanical Engineering Shandong University

The unexpected scaling phenomena have resulted in significant damages to the oil and gas industries,leading to issues such as heat exchanger failures and pipeline clogging. It is of practical and fundamental importance to understand the scaling mechanisms and develop efficient anti-scaling strategies. However,the underlying surface interaction mechanisms of scalants(e.g., calcite) with various substrates are still not fully understood. In this work, the colloidal probe atomic force microscopy(AFM) technique has been applied to directly quantify the surface forces between calcite particles and different metallic substrates,including carbon steel(CR1018), low alloy steel(4140), stainless steel(SS304) and tungsten carbide,under different water chemistries(i.e., salinity and p H). Measured force profiles revealed that the attractive van der Waals(VDW) interaction contributed to the attachment of the calcium carbonate particles on substrate surfaces, while the repulsive electric double layer(EDL) interactions could inhibit the attachment behaviors. High salinity and acidic p H conditions of aqueous solutions could weaken the EDL repulsion and promote the attachment behavior. The adhesion of calcite particles with CR1018 and4140 substrates was much stronger than that with SS304 and tungsten carbide substrates. The bulk scaling tests in aqueous solutions from an industrial oil production process showed that much more severe scaling behaviors of calcite was detected on CR1018 and 4140 than those on SS304 and tungsten carbide, which agreed with surface force measurement results. Besides, high salinity and acidic p H can significantly enhance the scaling phenomena. This work provides fundamental insights into the scaling mechanisms of calcite at the nanoscale with practical implications for the selection of suitable antiscaling materials in petroleum industries.

关键词： Scaling phenomenon Metallic substrates Surface forces Bulk scaling tests

Portable fluorogenic probe for monitoring of volatile amine vapour and food spoilage

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Chinese Chemical Letters 2024年第3期35卷 257-261页

作者： Jian-Hao Zhao Wen-Xing Xu Bin Li Wei Xu Wu-Kun Zhang ming-Shuai Yuan Hui-Zi Li Qing-Guo He Xiang ma Jian-gong Cheng Yan-Yan Fu State key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of materials science and Optoelectronics engineering University of the Chinese Academy of SciencesBeijing 100039China school of Physical science and Technology ShanghaiTech UniversityShanghai 201210China key laboratory for Advanced materials and Feringa Nobel Prize Scientist Joint Research Center Frontiers science Center for materiobiology and Dynamic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

There are urgent needs of volatile amine gas sensors with high-performance in food quality control,disease monitoring and environmental ***-film fluorescent probe is suitable for amine vapour sensing due to its high sensitivity,high selectivity,and no polluting ***,a novel fluorescent probe based on indacenodithiophene structure withπconjugated system was designed and *** experimental results show that the films prepared by this material exhibit rapid and distinct fluorescence quenching after being exposed to saturated vapours of primary amine,secondary amine and tertiary amine represented by n-propylamine,diethylamine and trimethylamine,*** quenching of fluorescence is 84%,87%and 96%,respectively,within 10 *** detection mechanism of probe for primary amine is based on specific chemical reaction,while the detection mechanism for secondary amine and tertiary amine is intramolecular charge *** experiments show that the detection limit of the fluorescent probe for trimethylamine,an important marker of food spoilage,could reach 4.610 ***-site detection based on spoilage of small yellow croaker suggests the material possesses the potential for food freshness *** simple fluorogenic probe is an original approach to simplify real-time visual monitoring of volatile amine vapour.

关键词： Fluorescent probe Volatile amine Gas sensing Trimethylamine Food spoilage

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Shape and composition evolution of Pt and Pt_(3)M nanocrystals under HCl chemical etching

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Chinese Chemical Letters 2024年第9期35卷 403-407页

作者： Lian Sun Honglei Wang ming ma Tingting Cao Leilei Zhang Xingui Zhou State key laboratory of NBC Protection for Civilian Beijing 102205China science and Technology on Advanced Ceramic Fibers and Composites laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China school of materials science and engineering Beijing Institute of TechnologyBeijing 100081China State key laboratory of Crystal materials and Institute of Crystal materials Shandong UniversityJi’nan 250100China

Controlling the shape and composition of Pt-based nanocrystals is essential to improve electrocatalytic *** this work,we have carefully investigated the evolution process of morphology and composition for Pt and Pt_(3)M(M=Ni,Co)nanocrystals by hydrochloric acid(HCl)*** a result,only Pt_(3)Ni nanocrystals successfully formed unsaturated step-like atoms on the surface and then constructed high-index facets(HIFs),while Pt and Pt_(3)Co preserved a good octahedron *** functional theory(DFT)calculation suggests that Cl-ions can be tightly adsorbed on the surface of Pt_(3)Ni rather than other nanocrystals,which hinders the deposition of newly-reduced atoms and thus regulating the surface ***,the etching of surface transitional metals further accelerates the formation of *** by the active sites on the surface,HCl-Pt-Ni exhibited a~10.8 and~11.3 times higher oxygen reduction reaction(ORR)mass and specific activities than commercial Pt/C catalyst,and possessed a good durability after 10,000 cycles *** work gives a deep insight into the design of high-performance Pt-based ORR catalysts.

关键词： Electrocatalysts Nanocrystals Platinum Oxygen reduction reaction DFT calculation

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High MXene loading, nacre-inspired MXene/ANF electromagnetic interference shielding composite films with ultralong strain-tofailure and excellent Joule heating performance

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Nano Research 2024年第3期17卷 2061-2069页

作者： Jiaen Wang Tianliang song Wei ming Moxi Yele Longfu Chen Hao Zhang Xiaojuan Zhang Benliang Liang Guangsheng Wang school of Physical science and engineering Beijing Jiaotong UniversityBeijing 100044China College of Chemistry and materials engineering Beijing Technology and Business UniversityBeijing 100048China key laboratory of Bio-Inspired Smart Interfacial science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

The high power density and intelligence of next-generation flexible electronic devices bring many challenges to fabricate flexible composite films with electromagnetic interference(EMI)shielding effectiveness(SE)property and excellent toughness via a simple ***,inspired by the layered structure and biopolymer matrix networks in natural nacre,nacre-like layered Ti_(3)C2TX(MXene)/aramid nanofiber(ANF)films were fabricated through sol-gel,vacuum-assisted filtration,and ***-dimensional(3D)interconnected aramid nanofibers networks between adjacent layered MXene result in an ultralong strain-to-failure of the *** though the functional filler MXene contents are as high as 60 wt.%and 70 wt.%,the strain-to-failure of the films could reach astonishing values of 18.34%±1.86%and 14.43%±1.26%,*** the tensile strength could maintain about 85 ***,with such a high filler,the film can also withstand double folding and vigorous rubbing without damage,which could better adapt to a harsh application *** result means that this work provides a convenient way to prepare other high functional filler composite films with excellent mechanical *** EMI SE values could reach 45 and 52.15 dB at 60 wt.%and 70 wt.%MXene in 8.2–12.4 ***,the films have prominent Joule heating properties,high sensitivity(mall voltage operation(0.5 V),and high operation constancy(1300 s).Therefore,nacre-inspired MXene/ANF composite films in this work have ability to apply in many areas including communication technology,military,and aerospace.

关键词： bioinspired aramid nanofiber networks ultralong strain-to-failure toughening mechanism electromagnetic interference shielding

Recent progress in Prussian blue electrode for electrochromic devices

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Frontiers in Energy 2024年第2期18卷 160-186页

作者： Yongting ZHANG Wanzhong LI Hui gong Qianqian ZHANG Liang YAN Hao WANG key laboratory for New Functional materials of the Ministry of Education Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China school of Instrument science and engineering Southeast UniversityNanjing 210096China beijing aerospace Times Laser Inertial Technology Company Beijing 100094China

Great progress has been made in the electrochromic(EC)technology with potential applications in various *** one of the most promising EC materials,Prussian blue(PB)has attracted great attention due to its excellent EC performance,such as low cost,easy synthesis,rich color states,chemical stability,suitable redox potential,and fast color-switching *** review summarizes the recent progress in PB electrodes and devices,including several typical preparation techniques of PB electrodes,as well as the recent key strategies for enhancing EC performance of PB ***,PB-based electrochromic devices(ECDs)have been widely used in various fields,such as smart windows,electrochromic energy storage devices(EESDs),wearable electronics,smart displays,military camouflage,and other *** opportunities and obstacles are suggested for advancing the development of PB-based *** comprehensive review is expected to offer valuable insights for the design and fabrication of sophisticated PBbased ECDs,enabling their practical integration into realworld applications.

关键词： Prussian blue electrochromism energy storage smart windows