Article
Materials Science, Multidisciplinary
Weiming Lin, Xuzhao He, Xiaowei Guo, Dengfeng Xu, Kui Cheng
Summary: A PVTF coating on a Ti substrate was prepared, and physical or chemical methods were used to treat Ti metal surfaces to achieve a high bonding strength with PVTF. The Ti metal surfaces were characterized using SEM, AFM, and WCA. Mechanical stretching testing was employed to measure the bonding strength of PVTF coatings. The improved bonding strength may be attributed to the higher OH concentrations on Ti metal surfaces, leading to the formation of chemical bonds with PVTF chains. Biocompatibility analysis confirmed no significant differences between the physical and chemical treatments on PVTF coatings cultured with BMSCs, demonstrating the potential of biomedical metal implants with a PVTF coating on a Ti substrate.
Article
Materials Science, Coatings & Films
Zixin Deng, Defu Liu, Yi Xiong, Xiangcheng Zhu, Hangbiao Mi, Jian Liu, Tao Chen
Summary: A novel technique for preparing a higher bioactive ceramic coating with a three-layer gradient structure on medical Ti substrate surface by wide-band laser cladding process has been proposed in this paper. It involves the preparation of a silver barrier layer, a transition layer, and a HA bioactive ceramic layer successively, providing excellent bioactivity and biocompatibility of the coating.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Yitian Zhao, Zhiqi Fan, Qiyang Tan, Yu Yin, Mingyuan Lu, Han Huang
Summary: In this study, a wear-resistant TiOxNy/alpha-Ti composite coating was successfully deposited onto Ti-6Al-4V, exhibiting high hardness and wear resistance due to the formation of reinforcing phases and excellent interfacial bonding.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Coatings & Films
Huaizhang Gu, Guofen Zhang, Enpei Cai, Geng Tang, Qibin Liu
Summary: The porous gradient bioceramic coating fabricated via laser cladding process was evaluated for bioactivity and biocompatibility through various tests. Results showed that the 2.5 wt% PFA and 5 wt% PFA coatings exhibited good ability towards mineralization and deposition of bioactive phase components.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Bo Wang, Gui Li, Jiayan Li, Long Wang, Xinpeng Zhuang, Wei Shi, Yi Tan
Summary: The introduction of root structure improves the oxidation resistance and bonding strength of chemical vapor deposition (CVD) SiC coating on C/SiC composites. The designed and prepared root structure, consisting of pores and SiC nanowires, enhances the bonding strength between the matrix and SiC coating, reduces coating cracking or spalling, and improves coating's oxidation resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Chenkun Sun, Hongzhi Ji, Liwei Guo, Xue Gong, Feifei Zhou, Wei Tian, Yiyong Wu, Xiaodong Zhang, You Wang
Summary: Interfacial strengthening between ceramic coating and metal substrate is achieved by modifying graphene oxide with silica sol and uniformly dispersing it in yttria-stabilized zirconia. The in-situ generation of interfacial carbides results in high bonding strength in the nanocomposite coatings. The bonding strength of the nanocomposite coating increases by up to 54% compared to nanostructured yttria-stabilized zirconia coating without NiCrAlY bond-coat, and even 17% higher than that of nanostructured conventional type yttria-stabilized zirconia coating with NiCrAlY bond-coat. This technique shows great potential for reinforcing the interface between various materials.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
C. Garcia-Cabezon, V. Godinho, C. Perez-Gonzalez, Y. Torres, F. Martin-Pedrosa
Summary: This study proposes an innovative strategy combining powder metallurgy based space-holder (SH) technique and electropolymerization to prepare porous biocompatible Ti substrates coated with PPy-AgNPs composite conductive polymers. The coated substrates show excellent adhesion and corrosion resistance, as well as enhanced antibacterial activity. This strategy has significant potential for the substitution of small damaged bone tissues, such as in tumors.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
C. Garcia-Cabezon, V. Godinho, C. Perez-Gonzalez, Y. Torres, F. Martin-Pedrosa
Summary: This study proposes an innovative strategy that combines two well-known easy and economical preparation techniques to provide porous Ti substrates for cortical bone tissue substitution, promoting bone in-growth and improving corrosion resistance, biocompatibility, and antibacterial activity by coating the substrates with PPy-AgNPs composite conductive polymers.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Coatings & Films
X. Kong, Y. T. Sun, Z. B. Wang
Summary: In this study, a gradient nanostructure was pre-formed in 304 stainless steel using plate surface mechanical rolling treatment (PSMRT), and a TiN coating was deposited on it. Scratch tests demonstrated that the critical load of coating detachment was significantly enhanced in the coated PSMRT sample, and a higher interfacial strength was achieved.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Optics
Baojuan Yang, Yanle Li, Fangyi Li, Xiaoxia Qi, Xingfu Sun, Weiqiang Cui, Jiyu Du
Summary: The study proposes a composite texturing surface pretreatment method to improve the bonding performance of hydroxyapatite (HA) coatings. The results show that coatings on composite texturing surfaces have higher tensile and shear strengths compared to coatings on grit blasted surfaces. This is attributed to the increased surface roughness, enlarged interfacial contact area, and weakened stress concentration effect of the composite texturing surface.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Biomedical
Le Yu, Tomas M. Silva Santisteban, Qinqing Liu, Changmin Hu, Jinbo Bi, Mei Wei
Summary: Surface modification techniques are used to enhance Ti-based materials for hard-tissue replacements. In this study, hydroxyapatite (HA) and collagen-hydroxyapatite (Col-HA) composite coatings were deposited onto a Ti-6Al-4V substrate using a biomimetic coating process. The coatings showed a gradient cross-sectional structure with a porous surface and a dense layer near the substrate interface, supporting osteoblast cell adhesion and bonding between the coating and substrate.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2021)
Article
Engineering, Mechanical
Jianfeng Zhao, Xinlei Pan, Jian Li, Zhiyong Huang, Qianhua Kan, Guozheng Kang, Liucheng Zhou, Xu Zhang
Summary: Systematic characterization of microstructure, mechanical testing and constitutive modeling were conducted to investigate the effects of laser shock peening (LSP) treatment on the tensile properties of Ti-6Al-4 V alloy. The study revealed that LSP treatment resulted in grain refinement and introduction of compressive residual stress, leading to changes in the material's elastic-plastic behavior. The established deformation mechanism-based model showed that surface grain refinement enhanced initial yielding and strain hardening, while residual stress had a weakening effect on initial yielding but little influence on strain hardening behavior.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Jubo Li, Zhenyu Ma, Ruidong Man, Chenhui Jia, Zhuangya Zhang
Summary: The interfacial bonding strength between the substrate and its coating is an important factor affecting the service life of parts. A mathematical model was developed to quantitatively describe the surface roughness and adhesion strength of the anti-corrosion coating, which can help reduce manufacturing costs. By controlling the substrate's surface roughness, the anti-corrosion life can be improved. The study established a model of interfacial bond strength and roughness, which was calibrated using the substrate surface and closely related to the cell spacing and length of the support.
Article
Chemistry, Physical
Lin Tang, Xiaoli Fan, Yusheng Tang, Junliang Zhang, Jie Kong, Junwei Gu
Summary: The surface activity and UV resistance of PBO fibers were enhanced by fabricating the Ce0.8Ca0.2O1.8/P(S-co-BCB-co-MMA) organic-inorganic hybrid coating, leading to improved interfacial bonding strength with modified BADCy resins.
APPLIED SURFACE SCIENCE
(2021)
Article
Optics
M. H. Nie, S. Zhang, Z. Y. Wang, H. F. Zhang, C. H. Zhang, H. T. Chen
Summary: This study introduces a self-designed T-shaped sample and related fixtures to characterize the interface bonding strength of laser cladding coatings. Tensile tests were conducted on T-shaped specimens with different cross-sectional areas, confirming the effectiveness and repeatability of the method. The research reveals the hybrid fracture mechanism of interface bonding strength in laser cladding coatings.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Sen Xiang, Xingtao Liu, Rong Xu, Fei Yin, Gary J. Cheng
Summary: Lightweight high-strength steel is an important subject in the field of structural materials. Recent studies have shown that the use of B2 intermetallic phase can further enhance the mechanical properties of metal alloys. In this study, a thermal-controlled high strain rate plastic deformation process called warm laser shock peening (wLSP) was used to process a lightweight Fe-Mn-Al-C steel, resulting in the precipitation of B2 intermetallic phase and high density dislocations. The strong coupling effect between the B2 intermetallic precipitates and shock wave leads to the avalanche multiplication of ultrahigh density and ultrafine B2 precipitates, significantly improving the strength and ductility of the material.
Article
Chemistry, Multidisciplinary
Meng-Nan Zhu, Haoqing Jiang, Bo-Wen Zhang, Minrui Gao, Peng-Fei Sui, Renfei Feng, Karthik Shankar, Steven H. Bergens, Gary J. Cheng, Jing-Li Luo
Summary: In this study, a high-energy pulsed laser method was developed to enrich Bi single atoms, and it was found that Bi-C exhibited excellent performance for the CO2RR, selectively producing formate with high current density and TOF value.
Review
Materials Science, Multidisciplinary
Yixuan Ye, Yu Zhang, Tao Huang, Shikun Zou, Yalin Dong, Han Ding, Vijay K. K. Vasudevan, Chang Ye
Summary: Many aviation accidents are caused by failure of aircraft engine components, particularly engine blades which are susceptible to fatigue fracture and impact damage. The United States has successfully implemented laser shock peening (LSP) to enhance fatigue performance of these components. This review provides an overview of LSP development for treating aircraft engine components, with a focus on limitations and challenges. It serves as a reference for future research to improve component performance.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Shifeng Li, Leiyang Wang, Bang Wu, Dingyi Guo, Yunfan Li, Yilin Zhao, Gary J. Cheng, Feng Liu
Summary: In this article, a 40-W X-band monolithic GaAs balanced limiter is fabricated using GaAs p-i-n technology. Various techniques such as rounded rectangular p-i-n diode, Lange coupler with widened crossover wires, reasonable thickness I-layer, and optimized isolated terminal resistance are employed to improve the power-handling capability of the limiter. The experimental results demonstrate that the limiter exhibits excellent small-signal performance with an insertion loss of less than 1.2 dB and input/output return losses of less than -20 dB. Moreover, it can handle a maximum power of more than 40 W while maintaining an output power of less than 20 dBm, making it highly suitable for high-power X-band communication systems.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Mechanical
Jing Yang, Daoxin Liu, Kaifa Fan, Yanjie Liu, Zhencheng Ren, Dan Liu, Xingchen Xu, Tianyi Jia, Hao Zhang, Chang Ye
Summary: In this study, a gradient nanostructured GH4169 superalloy was prepared using ultrasonic surface rolling process (USRP), and the compressive residual stress was determined to be the leading factor for the improvement of its fretting fatigue resistance at elevated temperatures.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Manufacturing
Sen Xiang, Xingtao Liu, Licong An, Haozheng Qu, Gary J. J. Cheng
Summary: This paper proposes a novel method to modulate the heating and cooling during laser shock processing via temporal pulse shaping, combining ultrafast-heating and laser shock peening to generate desired microstructure and mechanical property. Different processing temperatures can be achieved by modulating the duration and spacing of pulses. Finite element method modeling and phase-field model are used to simulate and study the temperature profile, dislocation dynamics, and nanoprecipitation generation during this process.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Nanoscience & Nanotechnology
Tan Shu, Nan Hu, Feng Liu, Gary J. Cheng
Summary: High entropy alloys (HEAs) have gained attention for their excellent mechanical and functional properties. However, as-cast HEAs do not meet the requirements for high strength structural parts. This study presents an AlN nanoparticle-reinforced HEA matrix nanocomposite fabricated by powder bed fusion, which exhibits excellent mechanical properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Fei Yin, Shengtu Ma, Shan Hu, Yanxiong Liu, Lin Hua, Gary J. Cheng
Summary: This study explores the application of electrically assisted plastic deformation (EAPD) process in TC11 titanium alloy to enhance its formability. The mechanical behavior and microstructure evolution of TC11 titanium alloy under different current densities and strain rates were systematically investigated. It was found that pulse current can improve the formability/plasticity of TC11 titanium alloy and reduce energy consumption during manufacturing.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Multidisciplinary Sciences
Xinyu Huang, Luman Zhang, Lei Tong, Zheng Li, Zhuiri Peng, Runfeng Lin, Wenhao Shi, Kan-Hao Xue, Hongwei Dai, Hui Cheng, Danilo de Camargo Branco, Jianbin Xu, Junbo Han, Gary J. J. Cheng, Xiangshui Miao, Lei Ye
Summary: The exchange bias effect is enhanced by pressure tuning in a van der Waals heterostructure, leading to improved sensitivity and stability, and demonstrating a highly efficient spin valve. These findings provide opportunities for future customization of 2D spintronic devices.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Mechanical
Yixuan Ye, Chaoyi Zhang, Le Gao, Lan Peng, Gang Liu, Yu Zhang, Chao Tang, Tao Huang, Chang Ye
Summary: Additive manufacturing has great potential in the biomedical and aerospace industries, but the mechanical properties of additively manufactured parts are poor compared to traditional parts. To address this issue, the EP-UNSM technology is proposed, which improves the surface quality and plastic deformation depth of parts by applying pulsed current, and proves the existence of the athermal effect of electroplasticity.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Mechanical
Xin Li, Jingyi Zhao, Yixuan Ye, Ziheng Xu, Gang Liu, Xuekun Luo, Xin Wang, Yalin Dong, Tao Huang, Chang Ye, Han Ding
Summary: An analytical model based on Hertzian contact theory and the Neuber plasticity rule is proposed to predict residual stresses generated by laser shock peening (LSP). The model is validated using experimental data. By establishing a database connecting LSP parameters with residual stress, the effects of LSP parameters on residual stress distribution can be studied and optimal LSP parameters for desired residual stress characteristics can be obtained. This multi-objective optimization method is expected to guide LSP experiments effectively.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Jing Yang, Daoxin Liu, Mengyao Li, Zhencheng Ren, Dan Liu, Xingchen Xu, Xiaohua Zhang, Hao Zhang, Junfeng Xiang, Chang Ye
Summary: This study investigates the evolution mechanism of surface gradient nanostructure induced by the ultrasonic surface rolling process (USRP) in GH4169 superalloy. Characterization using transmission electron microscopy reveals that repeated impacts from USRP produced a gradient nanostructure with a thickness of -330 µm on the material's surface. The topmost surface exhibits equiaxed nanograins with an average grain size of -30 nm, with grain size increasing with depth. The study also explores the formation of dislocations, deformation twins, and stacking faults in the nanocrystallization process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Dingyue Sun, Ming Peng, Taijin Wang, Longju Yi, Shizuo Zhang, Feng Liu, Gary J. Cheng
Summary: The addition of leflunomide (LF) to perovskite films has been shown to reduce defects and improve the photoelectric properties. The C=O bond on LF molecule can interact with the uncoordinated Pb2+ in the perovskite, reducing non-radiative recombination. LF also forms a protective layer and alters the nucleation position of perovskite, leading to decreased defects and optimized film quality. The LF-doped perovskite film exhibits low trap density and high photoelectric performance.
Article
Nanoscience & Nanotechnology
Ziran Zeng, Yunfan Li, Yilin Zhao, Jun Yuan, Longju Yi, Peilong Li, Gary J. Cheng, Feng Liu
Summary: This study investigates the application of carbonized NiCo-MOFs in flexible pressure sensors and demonstrates the improvements in performance achieved through the use of RTP carbonization. The RTP-carbonized NiCo-NPCs exhibit a modified morphology compared to the CTP-carbonized ones, resulting in higher sensitivity, wider range, and better stability and response time in the piezoresistive sensors. Moreover, the study also highlights the potential applications of the sensor in dynamic loading tests, airflow monitoring, voice recognition, and gesture detection.
Article
Multidisciplinary Sciences
Chenqi Yi, Shuyuan Qu, Yaoyu Wang, Haoning Qi, Yufeng Zhang, Gary J. Cheng
Summary: This article introduces a 3D nanoprinting method called free-space nanopainting, which uses an optical force brush (OFB) technique. OFB enables high-precision nanopatterning and significantly improves printing speed and material options.
