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Tungsten 2024年第1期6卷 134-140页

作者： Lin-Chao Zhang Ke Jing Rui Liu Zhuo-Ming Xie Jun-Feng Yang Gang Li Xian-Ping Wang Xue-Bang Wu Qian-Feng Fang Chang-Song Liu Key Laboratory of Materials Physics Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610041China

The cermet fuels have been considered as a potential key component for the nuclear thermal propulsion,and the homogeneity of the fuel particles in the metal matrix plays a crucial role in stabilizing the structure at extremely high *** this work,liquid paraffin was used as additive to improve the distribution of yttria-stabilized zirconia(YSZ,an appropriate surrogate for UO_(2) fuel)microspheres in the tungsten(W)matrix,and the W-YSZ cermet wafers(volume ratio 1:1)with a relative density of 97.6%were fabricated by spark plasma sintering with a specifically designed *** effects of the paraffin dosage(0-5 wt.%)on the homogeneity,microstructure,mechanical properties,and the thermal conductivity of W-YSZ cermet were *** W-YSZ sample with 2 wt.%paraffin shows the highest homogeneity and exhibits the best comprehensive properties,including the ultimate tensile strength of 132.2 MPa at 600℃,the bending strength of455 MPa and thermal conductivity of 50 W·m^(-1)·K^(-1)at room ***,the cermet could keep structurally sound after thermal shocked at a heat load of 20 MW·m^(-2).These results would be helpful for the design and optimization of the cermet fuels in the nuclear thermal propulsion.

关键词： Nuclear thermal propulsion Tungsten Cermet Liquid paraffin thermal shock

Comparison of thermal shock resistance capabilities of the rotary swaged pure tungsten,potassium-doped tungsten,and W-La2O3 alloys

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Tungsten 2024年第4期6卷 759-766页

作者： Tao Yang Hao Wang Fan Feng Xiang Liu Xue-Yu Gong You-Yun Lian Jian-Bao Wang School of Nuclear Science and Technology University of South China Southwestern Institute of Physics

Tungsten-based materials are one of the most important candidates for the plasma facing materials（PFMs） of future fusion reactors,and it is necessary to study the properties of tungsten-based materials under the service conditions of fusion devices to ensure the long-term steady-state operation of future fusion *** this paper,different tungsten-based materials made by the same rotary swaging process are selected to simulate the transient thermal loads on the PFMs of a fusion reactor using an electron beam,and thermal load experiments are carried out by changing the power density of a loading pulse and the pulse *** is found that different tungsten-based materials made by the same process have large differences in thermal shock resistance,and the doped tungsten materials（W-K and W-La2O3） are significantly better than the pure tungsten materials with the increase in thermal shock power density and the number of cycles,especially the W-K materials,which have excellent performance.

关键词： Electron beam Rotary swaging thermal shock Tungsten materials

Carbon nanotube films with ultrahigh thermal-shock and thermalshock-fatigue resistance characterized by ultra-fast ascending shock testing

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Nano Research 2024年第8期17卷 6777-6784页

作者： Mingquan Zhu Shijun Wang Yunxiang Bai Feng Gao Zhenxing Zhu Congying Wang Peng Zhang Hao Jin Hui Zhang Luqi Liu Zhiping Xu Xinghong Zhang Fei Wei Zhong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150001China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The exploration of material failure behavior not only involves defining its limits and underlying mechanisms but also entails devising strategies for improvement and protection in extreme ***'ve pioneered an advanced multi-scale,high-speed ascending thermal shock testing platform capable of inducing unprecedented heat shocks at rates surpassing 105℃/*** meticulous examination of the thermal shock responses of carbon nanotube(CNT)films,we've achieved remarkable *** employing an innovative macro-scale synchronous tightening and relaxing approach,we've attained a critical temperature differential in CNT films that exceeds an exceptional 2500℃—surpassing any previously reported metric for highperformance,thermal-shock-resistant ***,these samples have demonstrated exceptional resilience,retaining virtually unchanged strength even after enduring 10,000 thermal shock cycles at temperatures exceeding 1000℃.Furthermore,our research has revealed a novel thermal shock/fatigue failure mechanism that fundamentally diverges from conventional theories centered on thermal stress.

关键词： carbon nanotubes failure behavior thermal shock characterization

thermal shock of subsurface material with plastic flow during scuffing

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Friction 2023年第1期11卷 64-75页

作者： Chuanwei ZHANG Han ZHAI Dong SUN Dezhi ZHENG Xiaoli ZHAO Le GU Liqin WANG MIIT Key Laboratory of Aerospace Bearing Technology and Equipment Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150080China

The thermal shock of subsurface material with shear instability and severe plastic flow during scuffing was *** scuffing damage of M50 steel was tested using a high-speed rolling-sliding contact test rig,and the transient temperature during scuffing was calculated using the Fourier transform method considering the effects of both frictional heat and plastic *** results show that a thermal shock with a rapid rise and subsequent rapid decrease in the contact temperature is generated in the subsurface *** frictional power intensity generates a high temperature rise,leading to the austenitization of the subsurface ***,the plastic flow is generated in the subsurface layer under the high shear stress,and the resulting plastic strain energy generates a further temperature ***,a rapid decrease in the contact temperature quenches the material,resulting in clear shear slip bands and retained austenite in the subsurface layers of the M50 steel.

关键词： scuffing thermal shock high temperature plastic flow

Magneto-Thermoelasticity with thermal shock Considering Two Temperatures and LS Model

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Computers, Materials & Continua 2022年第2期70卷 3365-3381页

作者： F.S.Bayones S.M.Abo-Dahab N.S.Hussein A.M.Abd-Alla H.A.Alshehri Department of Mathematics and Statistics College of ScienceTaif UniversityP.O.Box 11099Taif21944Saudi Arabia Mathematics Department Faculty of ScienceSouth Valley UniversityQena83523Egypt Computer Science Department Faculty of Computers and InformationLuxor UniversityLuxorEgypt Mathematics Department Faculty of ScienceCairo UniversityEgypt Mathematics Department Faculty of ScienceSohag UniversityEgypt

The present investigation is intended to demonstrate the magnetic field,relaxation time,hydrostatic initial stress,and two temperature on the thermal shock *** governing equations are formulated in the context of Lord-Shulman theory with the presence of bodily force,two temperatures,thermal shock,and hydrostatic initial *** obtained the exact solution using the normal mode technique with appropriate boundary *** field quantities are calculated analytically and displayed graphically under thermal shock problem with effect of external parameters respect to space *** results obtained are agreeing with the previous results obtained by others when the new parameters *** results indicate that the effect of magnetic field and initial stress on the conductor temperature,thermodynamic temperature,displacement and stress are quite *** order to illustrate and verify the analytical development,the numerical results of temperature,displacement and stress are carried out and computer simulated results are presented *** study helpful in the development of piezoelectric devices.

关键词： Thermoelastic thermal shock initial stress two temperatures magnetic field relaxation time

Simulating the stress–strain state of a thin plate after a thermal shock

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第3期13卷 245-254页

作者： A.V.Sedelnikov S.V.Glushkov V.V.Serdakova M.A.Evtushenko E.S.Khnyryova Samara National Research University 34 Moskovskoye ShosseSamara 443086 Samarskaya OblastRussia Amur State University 21Ignat’yevskoye Shosse Blagoveshchensk 675027Amurskaya OblastRussia

The paper is devoted to simulating the impact of a thermal shock on a thin homogeneous plate in the ANSYS *** assessment of the stress–strain state is carried out and the dynamics of changes in the temperature field of the plate is *** obtained results were compared with the data of other authors and can be used when taking into account the thermal shock of large elastic elements of spacecraft.

关键词： thermal shock thin plate stress-strain state temperature field

thermal shock-Activated Spontaneous Growing of Nanosheets for Overall Water Splitting

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Nano-Micro Letters 2020年第11期12卷 269-280页

作者： Han Wu Qi Lu Jinfeng Zhang Jiajun Wang Xiaopeng Han Naiqin Zhao Wenbin Hu Jiajun Li Yanan Chen Yida Deng School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsKey Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)Tianjin UniversityTianjin 300350People’s Republic of China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New CityFuzhou 350207People’s Republic of China

Nanomaterials based on nickel foam(NF) have been widely applied in energy conversion and storage *** synthesis methods such as hydrothermal method which is dangerous and high cost limited the scalable ***,we report a fast,simple,and low-cost synthesis method of nanomaterials based on NF by Joule-heating and water soaking *** carbon-coated CoS on NF(NF-C/CoS) was synthesized by Joule-heating for a few seconds with rapid *** then,NF-C/CoS/NiOOH with core-shell heterostructure was fabricated by soaking treatment of NF-C/CoS in water on which NiOOH nanosheets grew *** formation mechanism is proposed that the coordination complex precursor converts into C/CoS on NF driven by Joule-heating,and the nickel on the surface of NF is activated to form metastable nickel *** metastable nickel reacting with water leads to the formation of NiOOH,and the induction of CoS makes NiOOH grow *** synthesis technology provides a new route to manufacture NF-based nanostructures,and the as-fabricated NF-C/CoS/NiOOH exhibits great potential as electrocatalyst for oxygen evolution reaction and hydrogen evolution reaction.

关键词： Ultrafast synthesis Spontaneous growing thermal shock Seed inducing Water splitting

thermal shock damage behavior of CVD ZnS by oxygen propane flame: A numerical and experimental study

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Chinese Journal of Aeronautics 2014年第2期27卷 266-271页

作者： Liu Yuanchun He Yurong Tian Fenglin Zhu Jiaqi School of Energy Science & Engineering Harbin Institute of Technology Center of Composite Materials Harbin Institute of Technology

Chemical vapor deposition zinc sulfide （CVD ZnS） is widely used as an infrared window material to transmit infrared signals, keep the aerodynamic shape and protect its imaging system, which often suffers high temperature and complicated thermal stresses. The purpose of this paper is to investigate the thermal shock damage of CVD ZnS through a finite element method and oxygen propane flame experiments. The finite element model is developed to simulate the temperature and thermal stress fields by an oxygen propane flame. Then, the thermal shock experiments are performed to investigate the thermal shock damage behavior. The results show that the temperature rising rate of the shock surface is fast during the initial heating stage resulting in high thermal stress. After the thermal shock experiment, the scanning electron microscope （SEM） photographs shows that the shock surface of the specimen becomes rough and the microcracks occur in the thermal shock zone. Good agreements are achieved between the numerical solutions and the experimental results.

关键词： CVD ZnS Damage behavior Finite element method,Oxygen propane flame thermal shock

thermal shock and fatigue behavior of pressureless sintered Al_(2)O_(3)-SiO_(2)-ZrO_(2) composites

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Journal of Advanced Ceramics 2015年第3期4卷 190-198页

作者： G.MEBRAHITOM ASMELASH O.MAMAT F.AHMAD A.K.PRASADA RAO Faculty of Manufacturing Engineering Universiti Malaysia PahangPekanPahangMalaysia Universiti Teknologi PETRONAS Bandar Seri Iskandar31750 TronohPerakMalaysia

The thermal shock and fatigue behavior of pressureless sintered Al_(2)O_(3)-SiO_(2)-ZrO_(2)(ASZ)composites was *** influence of the thermal shock and fatigue on the strengthening response of ASZ has been investigated by measuring the strength retention and microstructural *** magnitude of the flexural strength and fracture of the ASZ has been compared with that of the monolithic Al_(2)O_(3)(A)and Al_(2)O_(3)-SiO_(2)-ZrO_(2)(AZ)composites under the same experimental *** indicated that the ASZ composites possess the highest resistance against thermal shock and fatigue,in comparison with A and *** improvements were attributed to the enhancement in the fracture toughness of ASZ and the presence of multi-phase reinforcement.

关键词： ceramics flexural strength fracture toughness pressureless sintering thermal fatigue thermal shock

thermal shock OF SEMI-INFINITE BODY WITH MULTI-PULSED INTENSE LASER RADIATION

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Acta Mechanica Solida Sinica 2010年第2期23卷 175-180页

作者： Haiming Huang 1 Fang Su Yue Sun(Institute of Engineering Mechanics,Beijing Jiaotong University,Beijing 100044,China) Institute of Engineering Mechanics Beijing Jiaotong University Beijing China

In order to investigate the thermal shock and the heat conduction property of a target under multi-pulsed laser radiation, analytic expressions of both temperature and thermal stress fields in the target are deduced on the basis of the non-Fourier conduction law and the thermo-elastic theory. Taking a stainless steel target as an example, we can solve the analytic expressions under appropriate boundary conditions by using the finite difference method and MATLAB software, and then reveal the evolution law of both surplus temperaturt, and thermal stress in the target. The results indicate that the temperature curves in the target irradiated by a multi-pulsed laser take on a delayed character in different sections away from the boundary, which is only affected by its relaxation time. The front of the stress wave is very steep in the non-Fourier numerical solutions, which presents an obvious thermal shock, so it is necessary to consider the non-Fourier effect of semi-infinite body under the high energy laser radiation.

关键词： multi-pulsed laser non-Fourier effect thermal shock