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Effects of pellet surface roughness and pre-oxidation temperature on CMAS corrosion behavior of Ti_(2)AlC

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Journal of Advanced Ceramics 2022年第6期11卷 945-960页

作者： Lei GUO Guang LI Jing WU Xiaohui WANG School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Advanced Joining Technology Key Lab of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin 300072China School of Materials Science and Engineering Shenyang Ligong UniversityShenyang 110159China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Calcium–magnesium–alumina–silicate(CMAS)corrosion is a serious threat to thermal barrier coatings(TBCs).Ti_(2)AlC has been proven to be a potential protection layer material for TBCs to resist CMAS *** this study,the effects of the pellet surface roughness and temperature on the microstructure of the pre-oxidation layer and CMAS corrosion behavior of Ti_(2)AlC were *** results revealed that pre-oxidation produced inner Al_(2)O_(3)layer and outer TiO_(2)clusters on the pellet *** content of TiO_(2)decreased with decreasing pellet surface roughness and increased along with the pre-oxidation *** thickness of Al_(2)O_(3)layer is also positively related to the pre-oxidation *** Ti_(2)AlC pellets pre-oxidized at 1050℃could effectively resist CMAS corrosion by promoting the crystallization of anorthite(CaAl_(2)Si_(2)O_(8))from the CMAS melt rapidly,and the resistance effectiveness increased with the pellet surface ***,the CMAS layer mainly spalled off at the interface of CaAl_(2)Si_(2)O_(8)/Al_(2)O_(3)layer after thermal cycling tests coupled with CMAS *** Al_(2)O_(3)layer grown on the rough interface could combine with the pellets tightly during thermal cycling tests,which was attributed to obstruction of the rough interface to crack propagation.

关键词： thermal barrier coatings(TBCs) Ti2AlC surface roughness pre-oxidation temperature calcium-magnesium-alumina-silicate(CMAS)corrosion thermal cycling

Enabling a stable and dendrite-suppressed Zn anode via facile surface roughness engineering

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Journal of Materials Science & Technology 2022年第7期102卷 272-277页

作者： Jinghao Li Kehan Le Wei Wei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

The safety and cycle lifespan of zinc metal-based aqueous batteries are greatly restricted by zinc *** poor cycling performance of zinc metal anode is often considered to be impacted by the dendrite growth,surface passivation,zinc metal corrosion and hydrogen evolution reaction,while surface roughness is a matter that has often been ignored in past ***,a roughness gradient is constructed on the zinc anode surface by a simple grinding and pasting *** has been found the modified zinc anodes with lower surface roughness exhibit the smaller zinc deposition overpotential and longer cycle ***,in situ optical microscopy photographs indicate that the zinc anode with an optimized roughness enables more uniform distribution of zinc precipitation and corrosion sites,which will facilitate a stable cycling performance of aqueous zinc ion *** Zn anode dendrite-suppressing mechanism via surface roughness engineering was revealed through finite element computational *** results emphasize the effectiveness of roughness engineering for tuning the surface physics of Zn anode and provide a facile strategy to develop better and safer aqueous zinc ion batteries.

关键词： surface roughness Zn metal anode surface engineering Aqueous zinc-ion batteries

Role of surface roughness in the magnesite flotation and its mechanism

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Particuology 2022年第3期20卷 63-70页

作者： Zhanglei Zhu Yafeng Fu Wanzhong Yin Haoran Sun Keqiang Chen Yuan Tang Bin Yang School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Ansteel Beijing Research Institute CO. LTD.Beijing 102200China Genetic Mineral Processing Research Center Northeastern UniversityShenyang 110819China

surface roughness has a significant influence on mineral *** assisting effect of surface roughness on minerals flotation is extensively investigated from its physical properties(e.g.,the existing form of asperity and its size),however,the associated effect on mineral flotation based on the differences in surface chemical property caused by surface roughness has been rarely *** such a question in mind,in this study,we investigated the flotation recoveries of two batches of magnesite particles with varying degree of surface roughness produced by two different mills,and associated the flotation performances to their surface chemical properties(amount of adsorption sites for the collector)via a series of detections,including Scanning Electron Microscope-Energy Dispersive Spectrometry(SEM-EDS)observations,X-ray photoelectron spectroscopy(XPS)analysis,adsorption capacity tests,and contact angle ***,we concluded that rougher magnesite particles could provide more active sites(Mg^(2+))for a larger capacity of sodium oleate(NaOL),thereby improving the hydrophobicity and floatability.

关键词： surface roughness Active adsorption site Collector adsorption capacity Flotation performance

Effects of surface roughness on Interface Bonding Performance for 316H Stainless Steel in Hot-Compression Bonding

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Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 771-788页

作者： Yong Zhao Bi-Jun Xie Jin-Long Zhang Qin-Qiang Wang Bin Xu Jiang Guo Zhu-Ji Jin Ren-Ke Kang Dian-Zhong Li Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education Dalian University of TechnologyDalian116024China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The metallurgical bonding quality of bonding joints is affected by the substrate surface state in hot-compression bonding(HCB),and the surface roughness is a core indicator of the surface ***,the effects of surface roughness on interface bonding performance(IBP)in the HCB process are unclear for substrates with refractory oxide *** study presents the effects of surface roughness on IBP for 316H stainless steel joints fabricated by HCB.A set of HCB parameters for interface bonding critical state of 316H stainless steel joints was *** HCB experiments were carried out under parameters of interface bonding critical state to amplify the effect of surface *** interface morphologies,element distribution,and tensile properties were used to characterize the *** a result,the formation mechanisms of the interface pits were revealed and the variation trend of pit number with the roughness was ***,the mapping relation between surface roughness and IBP was *** results show that the degree of rotational dynamic recrystallization becomes weaker with the decrease in the surface roughness and the interface bonding mechanism is completely transformed into discontinuous dynamic recrystallization when the roughness is lower than 0.020μm *** number of interfacial pits decreases as the roughness decreases owing to the weakening of oxide scale aggregation and abrasive inclusion *** elongation of the tensile specimen cannot increase significantly while the roughness is lower than 0.698μm Sa.

关键词： surface roughness Interface bonding performance Hot-compression bonding Mapping relation Critical state

Numerical analysis and experimental validation of surface roughness and morphology in honing of Inconel 718 nickel-based superalloy

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Advances in Manufacturing 2023年第1期11卷 130-142页

作者： Chang-Yong Yang Zhi Wang Hao Su Yu-Can Fu Nian-Hui Zhang Wen-Feng Ding Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China

Honing is an important technology for machining onboard system *** parts are usually made of difficult-to-machining materials,e.g.,Inconel 718 *** can improve the finishing accuracy and surface ***,the selection of the honing parameters was primarily based on the results of a large number of ***,the establishment of a reliable model is needed to predict the honed surface roughness and morphology,and offers a theoretical direction for the choice of *** the present study,a numerical simulation model was constructed for analysis of the honing process by *** oilstone,workpiece surface morphology and motion trajectory were discretized by Python,and the machined surface was obtained by trajectory ***,based on the statistical analysis of the surface topography of oilstone,the shape of grains was simplified and the surface topography of oilstone was built ***,the initial surface morphology of the workpiece was constructed and the trajectory of grains on the workpiece surface was analyzed,which showed the distribution of the removed ***,the plastic deformation of material was analyzed in the simulation *** critical depth of three stages of contact between grains and workpiece was calculated by the theoretical formula:scratching,ploughing and *** analyzing the distribution of bulge,the plastic deformation in ploughing and cutting stage was ***,the simulated results of honed surface roughness and morphology were validated and agreed reasonably well with the honing ***,the effects of honing process parameters,including grain size,tangential speed,axial speed,radial speed and abrasive volume percentage,on the surface roughness of the workpiece were analyzed by the simulation model.

关键词： Numerical analysis surface roughness Plastic deformation Morphology

Effects of surface roughness on interfacial dynamic recrystallization and mechanical properties of Ti-6Al-3Nb-2Zr-1Mo alloy joints produced by hot-compression bonding

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Journal of Materials Science & Technology 2022年第1期96卷 199-211页

作者： Bijun Xie Zhenxiang Yu Haiyang Jiang Bin Xu Chunyang Wang Jianyang Zhang Mingyue Sun Dianzhong Li Yiyi Li Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China College of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

The influence of surface roughness on the interfacial dynamic recrystallization kinetics and mechanical properties of Ti-6 Al-3 Nb-2 Zr-1 Mo hot-compression bonding joints was systematically *** is found that for the bonding interface of rough surfaces,elongated fine grains are formed at the bonding interface due to shear deformation of the interfacial *** the surface roughness increases,the proportion of elongated grains drastically decreases as they further reorient to form equiaxed grains along the bonding interface of rougher surfaces resulting from severe incompatible deformation of the interface ***,high-density geometrically necessary dislocations accumulate around the interfacial recrystallization area to accommodate the incompatible strain and lattice rotation.A rotational dynamic recrystallization mechanism is thereby proposed to rationalize the formation of fine interfacial recrystallization grains during bonding of rough *** contrast to that of rough surfaces,bonding interface of polished surfaces exists in the form of straight interface grain boundaries without fine grains under the same deformation *** with the increase of deformation strain,small grain nuclei form along the bonding interface,which is associated with discontinuous dynamic recrystallization assisted by strain-induced boundary migration of interface grain ***,the bonding joints of rough surfaces show lower elongation compared with that of polished *** is because the formation of heterogeneous fine grains with low Schmid factor along the bonding interface of rough surfaces,leading to worse compatible deformation capability and thereby poor ductility of bonding joints.

关键词： surface roughness Rotational dynamic recrystallization EBSD Geometrically necessary dislocations Mechanical properties

Research on surface roughness of Supersonic Vibration Auxiliary Side Milling for Titanium Alloy

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 100-111页

作者： Xuetao Wei Caixu Yue Desheng Hu Xianli Liu Yunpeng Ding Steven Y.Liang Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin 150080China Department of Precision Manufacturing Engineering Suzhou Vocational Institute of Industrial TechnologySuzhou 215104China George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlanta 30332USA

The processed surface contour shape is extracted with the finite element simulation *** difference value of contour shape change is used as the parameters of balancing surface roughness to construct finite element model of supersonic vibration milling in cutting stability *** surface roughness trial scheme is designed in the orthogonal test design method to analyze the surface roughness test result in the response surface *** surface roughness prediction model is established and ***,the surface roughness finite element simulation prediction model is verified by *** research results show that,compared with the experiment results,the error range of the finite element simulation model is 27.5%–30.9%,and the error range of the empirical model obtained by the response surface method is between 4.4%and 12.3%.So,the model in this paper is accurate and will provide the theoretical basis for the optimization study of the auxiliary milling process of supersonic vibration.

关键词： Side milling Axial vibration Ultrasonic milling Finite element simulation Linear regression surface roughness

Impact of surface roughness,surface charge,and temperature on sandstone wettability alteration by nanoparticles

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Petroleum Science 2023年第5期20卷 2852-2863页

作者： Bingjun Zhang Kaustubh Rane Mohammad Piri Lamia Goual Lam Research Corporation 11361 SW Leveton Dr.TualatinOR97062USA Champion X Chemical Technologies 11177 S.Stadium Dr.SugarlandTX77478USA Center of Innovation for Flow through Porous Media Dept.4311University of Wyoming1000 E.University AvenueLaramieWY82071USA Department of Energy and Petroleum Engineering Dept.3295University of Wyoming1000 E.University AvenueLaramieWY82071USA

The wettability of rocks affects the balance between capillary and viscous forces during multiphase flow through porous media,which in turn determines the fluid displacement process governing the recovery of oil from subsurface *** this work,the mechanism of wettability reversal of aged synthetic sandstones by metal oxide nanoparticles(SiO_(2) and Al_(2)O_(3))was investigated with particular focus on the impact of surface roughness,zeta potential,and *** synthetic surfaces were prepared from powders of Berea sandstone with known grain size ranges and their average roughness and roughness ratio were obtained from the 3D surface reconstruction of their microscope *** surface was subsequently aged in Permian crude oil to alter its *** surfaces with larger grain sizes and lower surface roughness ratios,the lower capillary pressure allowed stronger oil/surface interactions,leading to enhanced *** wettability alteration effects of nanoparticles were then examined through real-time top view imaging and dynamic front view contact angle *** negatively charged SiO_(2) nanoparticles rapidly reversed the sandstone wettability,indicating their potential applicability as wettability alteration *** contrast,the positively charged Al_(2)O_(3) counterpart caused no wettability *** mechanism of wettability alteration was further studied by microscale interaction analyses and nanoscale transmission electron *** nanoparticles were only a few nanometers large,the microscale roughness had a negligible effect on the wettability ***,the combined effect of van der Waals dispersion forces and surface-charge-induced electrostatic forces were recognized as the two key factors affecting the wettability of sandstone *** interactions may be curbed at elevated temperatures due to a decrease in the zeta potential and colloidal stability of the particles.

关键词： Wettability Sandstone surface roughness Nanoparticle Microscope Enhanced oil recovery Contact angle Zeta potential

A hybrid physics-data-driven surface roughness prediction model for ultra-precision machining

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Science China(Technological Sciences) 2023年第5期66卷 1289-1303页

作者： BAI Long YANG QiZhong CHENG Xin DING Yue XU JianFeng State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Wuhan Digital Design and Manufacturing Innovation Center Co. LtdWuhan430074China

The surface finish quality is critical to the service performance of a machined part,and single-point diamond ultra-precision machining can achieve excellent surface quality for many engineering *** study studied the problem of predicting the surface roughness for titanium alloy workpieces in ultra-precision *** data and surface roughness measurement results were obtained during end-face machining experiments.A deep learning neural network model was built based on the ResNet-50 architecture to predict surface *** propose increasing prediction accuracy by using the energy ratio difference(ERD)as a stability feature that can be extracted using fast iterative variational mode decomposition(FI-VMD).The roughness value obtained with an analytic model was also used as an input feature of the prediction *** prediction accuracy of the proposed approach was depicted to be improved by 8.7%with the two newly introduced roughness *** influence of the tool parameters on the prediction accuracy was investigated,and the proposed hybrid-driven model exhibited higher robustness to errors of the tool parameters than the analytic roughness model.

关键词： surface roughness ultra-precision machining prediction model stability feature