Article
Chemistry, Multidisciplinary
Guang Li, Mingwei Lei, Chen Liang, Kai Li, Benhai Li, Xiaohua Wang, Junlong Wang, Zhipeng Wei
Summary: This paper studied the laser surface treatment of Al alloy using sandblasting and laser ablation methods. The experimental results showed that by controlling the laser spot spacing, the bonding performance of Al alloy can be improved. Multiple laser pulses induced micro-nano composite structures, increasing the contact area and thus improving shear strength.
APPLIED SCIENCES-BASEL
(2022)
Article
Mechanics
Hailang Wan, Junying Min, Jianping Lin
Summary: Surface physicochemical modifications induced by laser ablation treatment significantly improved joint strength and fracture mode, with the treatment strategy of assigning laser-treated regions on two bonding edges perpendicular to the loading direction being most effective. A theoretical model based on the Goland-Reissner equation successfully predicted joint strength with an overall error less than 10%.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Chemical
Fatih Hayati Cakir
Summary: In this study, it was found that laser texturing significantly improves surface wettability of titanium alloy sheet blocks, thereby enhancing bonding performance. Using a two component epoxy adhesive binder, lap joint bonding was conducted after surface preparation. The results showed increased adhesive strength and shear lap joint bond strength compared to samples without laser texturing.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Polymer Science
Hongfeng Li, Liwei Zhao, Yingjie Qiao, Xuefeng Bai, Dezhi Wang, Chunyan Qu, Changwei Liu, Yongqiang Wang
Summary: The wet peel ply prepared with bismaleimide (BMI) resins showed promising results in improving the bonding strength of carbon-fiber-reinforced composites. The study on reaction characteristics and viscosity-temperature characteristics of the matrix in the BMI wet peel ply contributed to the enhanced bonding performance.
Article
Physics, Applied
Seong-Jae Park, Ye-Rim Park, Soo-Jeong Park, Yun-Hae Kim
Summary: The chemical bonding and molecular deformation in thermoplastic adhesive bonding play important roles in adhesive properties. Investigating the correlation between molecular deformation and strength change is essential. The behavior at high temperatures is crucial due to different coefficients of thermal expansion in the materials. The study found that adhesive type affects the high-temperature performance, with different trends in strength change at different temperatures. The molecular deformation of the interphase follows the same trend as the strength.
MODERN PHYSICS LETTERS B
(2022)
Article
Optics
Xin Zou, Lei Liu, Ting Chen, Lei Wu, Ke Chen, Liang Kong, Min Wang
Summary: Adhesive bonding between steel and carbon fiber reinforced plastics (CFRP) is improved by laser surface treatment. Surface roughness, energy, and chemical composition of steel are studied after different laser treatments. Results show that surface properties are closely related to the interfacial bonding strength between steel and adhesives.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Anna Rudawska, Izabela Miturska-Baranska, Elzbieta Doluk
Summary: The study aimed to investigate the impact of different surface treatments on the strength of adhesive joints, revealing that adhesive joints prepared with a simple varnish achieved the best results when using cyanoacrylate adhesive, while joints of sheets coated with gel varnish had the highest shear strength when using epoxy adhesive.
Article
Polymer Science
Magali Ingles, Joana Vasconcelos E. Cruz, Ana Mano Azul, Mario Polido, Antonio H. S. Delgado
Summary: This study compares the adhesive interface formed in dentin using self-adhesive composites with different bonding strategies. The results indicate that using a primer strategy enhances the bond strength of the self-adhesive composite and provides sufficient collagen infiltration.
Article
Construction & Building Technology
Dongzhi Guan, Zhanhui Peng, Zixuan Chen, Jiabin Liu
Summary: In this paper, the shear performance of ECC-NC composite structures was investigated through bi-surface shear tests. The results showed a strong correlation between the shear strength of the interface and the strength of the NC, and the casting sequence had a significant effect on the performance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Naji Kharouf, Tarek Ashi, Ammar Eid, Levi Maguina, Jihed Zghal, Nairy Sekayan, Rim Bourgi, Louis Hardan, Salvatore Sauro, Youssef Haikel, Davide Mancino
Summary: The study concluded that the stability of the bond strength of universal adhesives over time depends on their compositions, regardless of the adhesive layer thickness and/or tag length.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Characterization & Testing
Tamas Temesi, Tibor Czigany
Summary: In this study, the mechanical response of laser-joined EN AW-6082 aluminium alloy and polypropylene (PP) specimens under quasi-static and cyclic shear loading was evaluated. Grooves were formed in the aluminium using laser ablation to increase the strength of the joints. The effect of PP melt viscosity and heat generated during the joining process on the shear strength of the joints was determined by using three types of PP with different melt viscosities. The adhesion between the apolar polypropylene and the aluminium was influenced by treating some PP specimens with maleic anhydride (MA) prior to joint formation. It was found that by doing so, the quasi-static shear strength of the joints increased by 50% on average, and the average failure cycle number of specimens could be increased by an order of magnitude when engraved grooves were combined with MA-treated PP specimens.
Article
Engineering, Industrial
Minqiu Liu, Yewang Chen, Ying Zhang, Junqing Zhao, Dongyang Wang, Chunbo Li, Jihong Pei, Deqin Ouyang, Shuangchen Ruan
Summary: Poor miscibility is a major factor hindering the weldability of dissimilar polymers and their composites, and traditional surface treatments are not effective in improving this issue. This study proposes a surface modification scheme involving laser ablation or etching to enhance the weldability of immiscible polymers. Experimental tests were conducted, and the results demonstrate that laser ablation induces the deposition of polar oxygen-containing groups on the polymer surface, thereby improving the miscibility and chemical bonding performance. Laser etching, on the other hand, generates grooves that enhance the bonding strength through a macro-anchoring effect. This work presents the feasibility of laser surface treatment to significantly improve the welding strength of immiscible polymers and their composites.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Polymer Science
Chiara Mandolfino, Lucia Cassettari, Marco Pizzorni, Stefano Saccaro, Enrico Lertora
Summary: This study used a response surface-designed experiment approach to determine the optimal settings of laser treatment for surface preparation of CFRP prior to bonding. The effects of power, pitch, and lateral overlap on the tensile shear strength of adhesive bonded joints were investigated using a nanosecond pulsed Ytterbium-doped-fiber laser source and a scanning system. The results were modeled using Response Surface Methodology (RSM) to identify the best performance parameters and predict the behavior of joints for untested parameter settings.
Article
Materials Science, Ceramics
Lutao Yan, Wang Chen, Haiyuan Li, Qinjian Zhang
Summary: This study investigates the effect of ultrasonic vibration on adhesive bonding performance of CMCs, and finds that ultrasonic treatment can improve adhesion strength and reduce porous areas, leading to a decrease in delamination occurrences.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Zhibo Xin, Yue Ma, Yuhe Chen, Ben Wang, Hong Xiao, Yugang Duan
Summary: In this study, short and short continuous fiber synergistic reinforced composites (S-CFRPCs) were successfully fabricated using fused filament fabrication. The effects of short fiber content on filament bonding properties were evaluated through short beam shear (SBS) and in-plane tensile shear tests. The results showed that specimens with 5% short fiber content exhibited higher load carrying capacities and significant fusion-bonding performances, with approximately 41% and 80% increase in interlaminar shear strength (ILSS) and in-plane shear strength, respectively, compared to specimens with 0% fiber content. The use of proper amounts of short fibers effectively improved the fusion-bonding properties of S-CFRPCs.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Optics
Zhi-Huan Pang, Meng Liu, Ai-Ping Luo, Yi Xu, Wen-Cheng Xu, Songnian Fu, Zhi-Chao Luo
Summary: We propose a novel mode-dependent gain equalizer using a few-mode chirped fiber Bragg grating (FM-CFBG) to effectively mitigate the mode-dependent gain in an all-fiber 2-mode EDFA. The equalizer based on FM-CFBG offers compact size, low insertion loss, and wavelength scalability, making it meaningful for long-haul MDM transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yiwei Qiu, Chenliang Ding, Gangyao Zhan, Mengdi Luo, Jisen Wen, Mengbo Tang, Chun Cao, Wenjie Liu, Liang Xu, Bihu Lv, Dazhao Zhu, Cuifang Kuang, Xu Liu
Summary: This article proposes a novel method to simultaneously reduce the axial and lateral feature sizes of PPI-DLW. By employing a pseudo 3D hollow focus, a suspended nanowire with an isotropic 30-nm feature size was realized, thereby improving the capabilities of PPI-DLW for fabricating arbitrary 3D structures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Manzhuo Wang, Jianbo Yue, Zhentao Yao, Tingyu Liu, Xiaoqiang Sun, Yuanda Wu, Daming Zhang
Summary: A silica waveguide 1×8 thermo-optic switch consisting of cascaded three-stage Mach-Zehnder interferometers (MZIs) is successfully demonstrated. The switch utilizes a multimode interference (MMI) coupler in the MMI-MZI 1×2 switch unit for its wavelength insensitivity and favorable fabrication tolerance. The switch design and optimization is based on the beam propagation method (BPM) and implemented using standard CMOS technologies. Experimental results show that the switch meets the requirements for insertion loss and crosstalk at 1550 nm wavelength, and also performs well in a wide wavelength range.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yuqi Wang, Zilong Zhang, Suyi Zhao, Wei He, Xiaotian Li, Xin Wang, Yuchen Jie, Changming Zhao
Summary: This paper investigates the impact of localized defects in SLM devices on structured light generation and demonstrates the reconstructed light field results under different defect states using CGH loaded onto the DMD. The results show that central defects have minimal influence on the reconstructed light field, while edge defects have a significant impact. This study expands the application scenarios for the generation of structured light beams with SLM.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Shihao Gou, Danping Huang, Shipeng Liao, Fan Luo, Yang Yuan, Liang Liu, Xiaomei Wen
Summary: This paper proposes an online intelligent detection method for cable pitch defects in the field of optical cable manufacturing. The method utilizes a multi-sensor fusion image acquisition platform and deep learning technology to achieve accurate detection of pitch defects in optical cables.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yali He, Jiao Tang, Zhongyang Li, Yaowu Hu
Summary: In this paper, a lithography-free broadband absorbing metasurface consisting of Ag nanoparticles with ultrafine nanogaps is demonstrated. The experimental results and numerical simulations show that the horizontally compressed Ag nanoparticles possess smaller nanogaps for high sensitivity, uniformity, and stability. The novel substrate also exhibits insensitivity to the incident or observation angle in an ambient environment and has promising practical applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)