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2020 IEEE Far East Forum on Nondestructive evaluation/testing: New technology and Application, FENDT 2020

作者： Gao, Xiang-Xi Wu, Su-Jun Tao, Chun-Hu Beijing China AECC Beijing Institute of Aeronautical Materials Beijing China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Beijing China Aviation Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation Beijing China

ISBN: (纸本)9781665440820

The microstructure and microtexture of TC4-DT alloy before and after quasi-β heat treatment are investigated, as well as the influence on the acoustic behaviors of ultrasonic inspection. C-scan ultrasonic images are obtained to investigate the evolution of microstructure confirmed by metallography and electron backscatter diffraction (EBSD) analysis. Noise level and signal-to-noise ratio (SNR) of ultrasonic inspection are also quantitatively verified. The results show that when TC4-DT alloy undergoes quasi-β heat treatment, attenuation and scattering of acoustic energy is significantly different. During this process, the scattering mechanism of acoustic changes from Rayleigh scattering to Phase scattering, which is mainly controlled by the grain size. Under the same scattering mechanism with the uniform average grain size, however, the regions of a-phase crystallites with a certain orientation contribute to the scattering of the acoustic wave. This finding is helpful for estimating ultrasonic inspection ability of large components. © 2020 IEEE.

关键词： Heat treatment

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Bioinspired Adaptive,Elastic,and Conductive Graphene Structured Thin-Films Achieving High-Efficiency Underwater Detection and Vibration Perception

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Nano-Micro Letters 2022年第4期14卷 129-141页

作者： Qiling Wang Peng Xiao Wei Zhou Yun Liang Guangqiang Yin Qiu Yang Shiao-Wei Kuo Tao Chen Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesZhongguan West Road 1219Ningbo 315201People’s Republic of China School of Chemical Sciences University of Chinese Academy of Sciences19A Yuquan RoadBeijing 100049People’s Republic of China Ningbo New Material Testing and Evaluation Center Co. LtdNingbo 315000People’s Republic of China Department of Material and Optoelectronic Science Center of Crystal ResearchNational Sun Yat-Sen UniversityKaohsiung 804TaiwanPeople’s Republic of China

Underwater exploration has been an attractive topic for understanding the very nature of the lakes and even deep *** recent years,extensive efforts have been devoted to developing functional materials and their integrated devices for underwater information ***,there still remains a great challenge for water depth detection and vibration monitoring in a high-efficient,controllable,and scalable *** by the lateral line of fish that can sensitively sense the water depth and environmental stimuli,an ultrathin,elastic,and adaptive underwater sensor based on Ecoflex matrix with embedded assembled graphene sheets is *** graphene structured thin film is endowed with favourable adaptive and morphable features,which can conformally adhere to the structural surface and transform to a bulged state driven by water *** to the introduction of the graphene-based layer,the integrated sensing system can actively detect the water depth with a wide range of 0.3-1.8 ***,similar to the fish,the mechanical stimuli from land(***,stomping)and water(*** blowing,raining,fishing)can also be sensitively captured in real *** graphene structured thin-film system is expected to demonstrate significant potentials in underwater monitoring,communication,and risk avoidance.

关键词： Janus film Water depth detection Vibration perception

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Carburized Layer Cracking Analysis of Counterweight Blocks of Speed Controller

Carburized Layer Cracking Analysis of Counterweight Blocks o...

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作者： Tao Jiang Bing Zhang Yimeng Mao Jiale Cheng Xiaodong Shi AECC Beijing Institute of Aeronautical Materials Failure Analysis Center of Aviation Industry Corporation of China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation Aero engine corporation of China

Trace and fracture analysis,metallographic examination,residual stress testing,and material analysis were carried out,coupled with examining the failure timeline,to analyze the cracking problem of 12 CrNi3 A steel counterweight blocks under multi-factor *** results show that the cracks of the counterweight blocks are intergranular microcracks in the carburized layer and they are delayed cracks under the joint action of microstructure stress,grinding stress and *** delayed cracking of the counterweight blocks is mainly related to abnormal hydrogen absorption during surface treatment and poor grinding *** obvious microstructure segregation in raw material and the thicker carburized layer promoted the *** following measures should be comprehensively taken to prevent such failure:strictly controlling raw material quality,hydrogen absorption and stress,as well as increasing the processes to remove hydrogen,reduce stress and stabilize microstructure.

关键词： Carburized layer Intergranular crack Delayed cracking Multifactor coupling Abnormal hydrogen absorption Grinding defects Microstructure segregation

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3D printed pore morphology mediates bone marrow stem cell behaviors via RhoA/ROCK2 signaling pathway for accelerating bone regeneration

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Bioactive materials 2023年第8期26卷 413-424页

作者： Qiji Lu Jingjing Diao Yingqu Wang Jianlang Feng Fansen Zeng Yan Yang Yudi Kuang Naru Zhao Yingjun Wang School of Materials Science and Engineering South China University of TechnologyGuangzhou510641PR China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou510006PR China NMPA Key Laboratory for Research and Evaluation of Innovative Biomaterials for Medical Devices.Guangzhou 510006PR China Medical Devices Research&Testing Center of SCUT Guangzhou510006PR China School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhou511442PR China Guangdong Institute of Advanced Biomaterials and Medical Devices Guangzhou510535PR China

Bone bionics and structural engineering have sparked a broad interest in optimizing artificial scaffolds for better bone ***,the mechanism behind scaffold pore morphology-regulated bone regeneration remains unclear,making the structure design of scaffolds for bone repair *** address this issue,we have carefully assessed diverse cell behaviors of bone mesenchymal stem cells(BMSCs)on theβ-tricalcium phosphate(β-TCP)scaffolds with three representative pore morphologies(i.e.,cross column,diamond,and gyroid pore unit,respectively).Among the scaffolds,BMSCs on theβ-TCP scaffold with diamond pore unit(designated as D-scaffold)demonstrated enhanced cytoskeletal forces,elongated nucleus,faster cell mobility,and better osteogenic differentiation potential(for example,the alkaline phosphatase expression level in D-scaffold were 1.5-2 times higher than other groups).RNA-sequencing analysis and signaling pathway intervention revealed that Ras homolog gene family A(RhoA)/Rho-associated kinase-2(ROCK2)has in-depth participated in the pore morphology-mediated BMSCs behaviors,indicating an important role of mechanical signaling transduction in scaffold-cell ***,femoral condyle defect repair results showed that D-scaffold could effectively promote endogenous bone regeneration,of which the osteogenesis rate was 1.2-1.8 times higher than the other ***,this work provides insights into pore morphology-mediated bone regeneration mechanisms for developing novel bioadaptive scaffold designs.

关键词： Bone mesenchymal stem cells 3D-printed scaffold Pore morphology Bone regeneration Structure-osteogenesis relationship

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Enhanced buried interface behaviors for high-performance Sn-Pb perovskite solar cells

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Journal of Energy Chemistry 2025年 108卷 605-613页

作者： Jiang, Peng Gao, Qinfei Zhu, Jingwei You, Jiayu Qu, Junyu Jiao, Wenbo Wu, Shenghan Xu, Yuliang Xu, Yuan Wang, Wenwu Ren, Shengqiang Xi, Herui Yao, Canglang Xiao, Chuanxiao Chen, Cong Zhao, Dewei College of Materials Science and Engineering & Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education Sichuan University Sichuan Chengdu610065 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China Ningbo New Materials Testing and Evaluation Center Co. Ltd. Zhejiang Ningbo315201 China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University Shanghai200433 China

Numerous defects at the buried interface of perovskite film and the exacerbated oxidation and degradation of tin-lead (Sn-Pb) perovskites induced by poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), due to its hygroscopic and acidic nature, limit performance improvement of Sn-Pb perovskite solar cells (PSCs). To address these issues, 1-Ethyl-3-Guanidinothiourea-Hydrochloride (EGH) was employed as a multifunctional modifier at the PEDOT:PSS/perovskite interface to regulate the buried interface behaviors of Sn-Pb PSCs. EGH can not only passivate the defects of the perovskite buried interface and regulate the work function of PEDOT:PSS for a more matched interface energy level, but also prevent the perovskite film from erosion damage by the acidic PEDOT:PSS for a more stable PEDOT:PSS/perovskite interface. Moreover, the interfacial charge transport dynamics were significantly improved by obviously suppressing interfacial non-radiative recombination losses. As a consequence, EGH-tailored 1.25 eV Sn-Pb PSCs yielded a champion PCE of 23.20%, featuring enhanced long-term stability. © 2025 science Press and Dalian Institute of Chemical Physics, Chinese Academy of sciences

关键词： Lead alloys

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Mirror aided ultrasonic testing of the bonding interface of dual-alloy blisk through the bore

Mirror aided ultrasonic testing of the bonding interface of ...

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2020 IEEE Far East Forum on Nondestructive evaluation/testing: New technology and Application, FENDT 2020

作者： Sha, Zheng-Xiao Gang, Tie Liang, Jing Han, Bo State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin China AECC Beijing Institute of Aeronautical Materials Beijing China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Beijing China Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation Aero Engine Corporation of China Beijing China

ISBN: (纸本)9781665440820

Welded dual-alloy blisks have found more and more applications in aeroengines for their excellent high temperature performance. However, defects may develop within the bonding interface and threat the safety of the engine. In this paper, the ultrasonic testing of the bonding interface was investigated in the dual-alloy blisk with a small bore. Aided by a 90 degrees mirror, the longitudinal wave was introduced to the interface. Simulations and theoretical analyses were performed to explain the propagating behavior of the sound beam upon the strongly curved surface. It was observed when the focus of the probe approaches a certain point, the beam distortion was compensated under 'acoustic lens effect'. The cylindrical focused probe was found to give better performance than flat probes and spherical focused probes in terms of sensitivity and resolution. The experiments on a mock-up sample showed that 0.8mm FBH and Φ0.4mm SDH at the bonding interface were detectable with a 15MHz cylindrical focused probe. © 2020 IEEE.

关键词： Probes

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Research progress on microstructure characterization of silicon carbide fibers 2

Research progress on microstructure characterization of sili...

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2021 2nd International Conference on Mechanical Engineering and materials, ICMEM 2021

作者： Zhang, Xingjian Cai, Zixi Fan, Jinjuan Liu, Changkui Ye, Jinfa AECC Beijing Institute of Aeronautical Materials Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation Beijing100095 China Northwestern Polytechnical University Queen Mary University of London Engineering School NPU Xi'an710129 China Fujian LEADASIA New Material Limited Company Fujian Quanzhou362000 China

Ceramic matrix composites have excellent properties such as high temperature resistance and oxidation resistance, and have good application prospects in the hot end parts of engines. In ceramic matrix composites, the microstructure composition of silicon carbide fibers determines their macroscopic properties. Therefore, this article takes silicon carbide fiber as the research object, summarizes the existing SiC fibers structure, composition, and morphology characterization methods, compares the development and advantages and disadvantages of XRD, SEM, TEM and other testing equipment analysis, and proposes The problems of sample preparation, surface defects and internal structure changes in the microstructure characterization of silicon carbide fibers are discussed, which provides a reference for the preparation of high-performance SiC fibers and the improvement of their characterization work. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Microstructure

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Effect of high temperature treatment in ar atmosphere on the tensile strength and structure of SiC fiber 2nd

Effect of high temperature treatment in ar atmosphere on the...

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2nd International Conference on Advanced materials, Processing and testing technology, AMPTT 2020

作者： Fan, Jinjuan Zhu, Qiangqiang Qi, Zhe Ye, Jinfa Beijing Institute of Aeronautical Materials Beijing100095 China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Beijing100095 China Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation AECC Beijing100095 China Fujian LEADASIA new materials limited company Fujian362000 China

ISBN: (纸本)9783035737400

. The properties and structure changes of SiC fiber in high temperature determine the service temperature of the reinforced ceramic matrix composites, so the properties of SiC fibers under high temperature are very important. The SiC-A and SiC-B fibers were treated at 1200, 1350 and 1600°C in Ar atmosphere. Then the tensile strength was measured, the microstructure and composition of the fibers were analyzed by SEM, EDS, XRD and AES. The results show that the tensile strength of SiCA and SiC-B decrease slowly at 1200 and 1350°C, but decrease rapidly at 1600°C. The tensile strength of SiC-B fiber decreases less slowly than that of SiC-A fiber. The grain size and the C-enriched region thickness of SiC-A and SiC-B fibers have little change under 1200 and 1350°C, but increase quickly at 1600°C. The decrease of the tensile strength of SiC-A and SiC-B fibers is mainly related to the growth of β-SiC grains. © 2021 Trans Tech Publications Ltd, Switzerland.

关键词： Silicon carbide

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Effects of building orientation on fatigue behavior of Ti-6Al-4V alloy produced by selective laser melting

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key Engineering materials 2019年 795卷 208-214页

作者： Xu, Rui Da Yu, Hui Chen AECC Key Laboratory of Aeronautical Materials Testing and Evaluation Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation Beijing Institute of Aeronautical Materials Beijing100095 China

Addictive manufacturing (AM) allows for the layer-by-layer fabrication of components via sequential material deposition and it is of immediate interest in many applications, in particularly aviation field. This work is tackling the issue that the influence of the inner-defects and building orientations on the fatigue behavior of Ti-6Al-4V Alloys produced by Selective Laser Melting (SLM). Specimens were built in two orientations (horizontal and vertical to the substrate) in order to evaluate the impact of the induced anisotropy of fatigue properties. A series of fatigue tests at stress ratio R=-1 are conducted at 400°C. Scanning Electron Microscopy (SEM) is used to examine the fracture surfaces of fatigue specimens to qualify the failure mechanism and crack initiation sites, which are most likely attached to the surface defects. The fracture surface analysis of HCF specimen tested that most of the crack initiates from the defect under subsurface. The results of this study imply that the fatigue properties at 400℃ are highly dependent on the specimen orientations relative to build directions, as the defects close to surface are the mainly cause of the crack initiations. © 2019 Trans Tech Publications Ltd, Switzerland.

关键词： Scanning electron microscopy

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Tetracycline Antibiotic Removal from Water by Wood Filters with Well-Arranged Natural Porous Structure

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Langmuir : the ACS journal of surfaces and colloids 2025年第22期41卷 2025 May 29页

作者： Yaqin Zhu Gaigai Duan Haoqi Yang Jingquan Han Xiaoshuai Han Chunmei Zhang Haimei Mao Hongliang Zhao Shuijian He Shaohua Jiang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials College of Materials Science and Engineering Nanjing Forestry University Nanjing 210037 China. College of Electrical Energy and Power Engineering Institute of Technology for Carbon Neutralization Yangzhou University Yangzhou Jiangsu 225127 China. Institute of Materials Science and Devices School of Materials Science and Engineering Suzhou University of Science and Technology Suzhou 215009 China. Key Laboratory of Quality Safe Evaluation and Research of Degradable Material State Administration for Market Regulation Hainan Academy of Inspection and Testing Haikou Hainan 570203 China.

Antibiotic pollution is a crucial global environmental issue, and it is necessary to develop simple, economical, and effective filtration materials for the removal of antibiotics from water. Wood, a plentiful and ecofriendly natural material characterized by a hierarchical porous architecture, robust mechanical strength, and abundant functional groups, has been adopted as an adsorptive filter for water purification. However, the mechanism of natural wood filters for removing pollutants from water has not been analyzed. In this study, we prepared three wood filters (balsawood, basswood, and Chinese fir) with different pore structures for the removal of the tetracycline (TC) antibiotic. We systematically investigated the structures and properties of the three wood filters to establish clear structure-property-performance relationships. By comprehensively considering the flux and TC removal efficiency, we selected the basswood filter as the optimal filter and further discussed the removal efficiency of the basswood filter and its removal mechanism for TC. When using five basswood filters, after continuously treating 120 mL of 0.5 mg L TC solution at 5000 L m h, a relatively high removal efficiency of over 85% could still be achieved. The filters retained ∼80.5% of their removal efficiency after five regeneration cycles, demonstrating excellent reusability. The further studies prove that there are three primary interaction forms in the process of TC removal by the basswood filter, which are electrostatic interaction, hydrogen bonding interaction, and π-π interaction. This is expected to be widely applied in actual wastewater treatment.

关键词： River pollution

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