Article
Materials Science, Multidisciplinary
Seyed Sadegh Khayat Ardestani, Valiollah Dashtizad, Ali Kaflou
Summary: Glass-metal seals are widely used in various industries, and the study focused on sealing Kovar alloy to borosilicate glass using an intermediate oxide layer. The optimal sealing conditions were identified as a nitrogen atmosphere, a temperature of 950 degrees C, and a time of 28 min. The study also found that sealing temperature and time significantly affect the seal strength, with the maximum strength achieved at 1000 degrees C for 4 min, resulting in a shear strength of 9.84 MPa.
MATERIALS CHARACTERIZATION
(2021)
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, Physical
Guangxu Zhao, Jing Zhang, Shuzhi Zhang, Gang Wang, Jianchao Han, Changjiang Zhang
Summary: In this study, a novel CoCuFeNiTiV0.6 high entropy alloy interlayer was used for vacuum diffusion bonding of TiAl alloy and TC4 titanium alloy. The effects of bonding temperature and pressure on the microstructure, element diffusion behavior, and mechanical properties of the joint were investigated. Different diffusion layers were formed at the interface, and their thickness increased with the increase of bonding temperature and pressure. The mechanical properties of the joints were improved compared to traditional bonding methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Construction & Building Technology
Kai Yang, Rui Li, Yi Yu, Jianzhong Pei
Summary: Interlayer bonding properties have a significant impact on the service life of multilayered pavements. This study evaluated five tack coats based on interlayer shear strength, with epoxy resin binder identified as the recommended option due to its superior shear, tensile, and flexural resistance. The results highlight the importance of considering multiple strength parameters in evaluating interface bonding properties.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Guang-jie Feng, Yan Wei, Bing-xu Hu, Yi-feng Wang, De-an Deng, Xiu-xia Yang
Summary: The study explored the vacuum diffusion bonding of Ti2AlNb alloy with TC4 alloy and found that the bonding temperature significantly influences the growth of reaction layers and shear strength of the joint. Under specific conditions, the shear strength of the joint can reach its maximum value.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2021)
Article
Materials Science, Multidisciplinary
Guo-zheng Ma, Peng-fei He, Hai-dou Wang, Hong-gang Tian, Li Zhou, Qing-song Yong, Ming Liu, Hai-chao Zhao, Dong-yu He
Summary: This study proposes a new approach to create a large area of metallurgical bonding at the coating-substrate interface by designing an Al-Si based gradient coating on an A383 alloy cylinder bore. The bonding strength of the coating is found to be desirable, resulting from the formation of chemical interdiffusion and homo-epitaxial growth at the interface.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Zhan Sun, Yingkai Ma, Yongjie He, Qing Chang, Bo Zhang, Lixia Zhang
Summary: This study reported the low-temperature sealing of Zr-4 alloy induced by alpha beta phase transitions using a pure Ti interlayer. Smooth transition at the Ti/Zr interface was observed when no phase transition occurred, while a diffusion zone was found after a beta-(Ti, Zr) phase transition. The results showed that the bonding temperature could be reduced by 100°C with the use of a pure Ti foil interlayer to achieve the same shear strength of 294 MPa. Molecular dynamics simulation data supported the facilitation of diffusion and lower bonding temperature in the beta-(Ti, Zr) phase transition zone.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Lixing Sun, Qian Yang, Juntao Zou, Lei Ni, Xuhang Song, Rongyan Zhang, Shuhua Liang
Summary: This study investigates the diffusion bonding of leaded-tin bronze and 45 steel using the hot-dip tin coating treatment. The results show that the treatment promotes the diffusion of elements between the two materials, resulting in the formation of a metallurgical joint with improved shear strength and ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Nanoscience & Nanotechnology
Nan Li, Qiang Lang, Hongyang Wang, Gang Song, Liming Liu
Summary: Coaxial dual-beam laser welding technology and Mg-Gd-Y-Zr alloy were utilized to achieve a lap joint of TC4 titanium alloy and QP980 steel, with a maximum tensile load of 3000 N/cm. The bonding mechanism of the Mg/steel interface and Mg/Ti interface was investigated. It was found that compounds formed between Mg and Gd, as well as Y and Fe, at the respective interfaces. The Mg/steel interface exhibited a connection between the lattices of the two compounds through shared Gd and Y atoms, with BCC-structured Mg24(Gd, Y)5 compound acting as the heterogeneous nucleation core of alpha-Mg. At the Mg/Ti interface, diffusion of Zr, Y, and Gd atoms into Ti formed a 35 nm thick diffusion layer, reducing the mismatch between the (100)BCC of beta-Ti and the (1010)HCP of alpha-Mg from 15.95% to 0.25%, enabling the joining of the Mg/Ti interface.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Xudong Zhang, Wei Fu, Xiaoguo Song, Zhuolin Li, Weimin Long, Danyang Lin, Yanyu Song, Sujuan Zhong
Summary: This study investigates the bonding of W90 tungsten heavy alloy and AZ31B magnesium alloy using ultrasonic-assisted soldering in atmospheric environment. The wetting behavior of Sn on W90 is improved with the application of ultrasound, but prolonged ultrasonication reduces the joint strength. A semi-coherent interface is formed at the Sn/W interface upon ultrasound.
Article
Crystallography
Zeming Wang, Xu Yang, Jing Wang, Zhonglin Xiao, Fugong Qi, Kongbo Sun, Ying Wang, Zhenwen Yang
Summary: The study investigated the vacuum diffusion bonding of Zr-4 alloy under different temperature and holding time conditions, revealing that the interface bonding ratio and grain size of the base material increased with temperature, resulting in a maximum shear strength of 349 MPa.
Article
Materials Science, Multidisciplinary
Chan Wang, Jian Chen, Shuhua Liang, Wenting Shao, Xigang Yang
Summary: A multiple processing technique combining infiltration and vacuum hot-pressing diffusion bonding was used to fabricate CuW/Al composite. The interfacial microstructure and mechanical properties were investigated. The shear strength of the CuW/Al interface was improved by hot-pressing, with a maximum value of 59.8 +/- 1.8 MPa obtained. Five different types of intermetallic compounds were identified at the interface, and the fracture mainly occurred in the first transition zone with brittle fracture characteristics.
Article
Materials Science, Multidisciplinary
Ahmad Saadati, Mehdi Malekan, Farzad Khodabakhshi
Summary: This study successfully prevented the crystallization of metallic glass and maintained dimensional accuracy by diffusion bonding below the glass transition temperature, utilizing the solid-state diffusion mechanism of elements to form dissimilar sound weldments with superior joint shear strength ratios.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Metallurgy & Metallurgical Engineering
Ping-yi Ma, Xu Chen, Xing Han, Zhi-qian Luo, He-li Peng
Summary: In this study, diffusion bonding of as-cast Mg-6Gd-3Y magnesium alloy was conducted, revealing that the gathering of rare earth elements and their compounds at the bonding interface hindered grain boundary migration. The tensile strength of the joints increased initially and then decreased with increasing bonding temperature, with the optimum strength observed at a bonding temperature of 440 degrees Celsius.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
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
Energy & Fuels
Shahriyar Safat Dipta, Md Habibur Rahaman, Walia Binte Tarique, Ashraful Hossain Howlader, Ayush Pratik, John A. Stride, Ashraf Uddin
Summary: Implementing a double-sided passivation approach can enhance the performance of n-i-p structured PSCs and improve the stability and photovoltaic properties of the cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Daniel Ourinson, Andreas Brand, Andreas Lorenz, Marwan Dhamrin, Sebastian Tepner, Michael Linse, Nathalie Goettlicher, Kosuke Tsuji, Jonas D. Huyeng, Florian Clement
Summary: This work presents two approaches to reduce the amount of silver on the rear side of M2-sized industrial iTOPCon solar cells. The Cu-based approach shows promise with similar power conversion efficiency compared to the conventional approach, while the Al-based approach exhibits some limitations but demonstrates the potential of such type of contact for iTOPCon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Abasifreke Ebong, Donald Intal, Sandra Huneycutt, Thad Druffel, Ruvini Dharmadasa, Kevin Elmer, Apolo Nambo
Summary: This study demonstrates the successful metallization of a PERC silicon solar cell using screen-printable copper (Cu) paste. The Cu paste contains antioxidant additives and diffusion inhibitors to prevent oxidation and diffusion of Cu. The Cu-printed cells achieved an efficiency of 19% and showed no Cu diffusion after characterization tests. The long-term stability and effectiveness of the Cu diffusion barrier were also confirmed.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Senami Zogbo, Wilfried Favre, Olivier Bonino, Marie-Estelle Gueunier-Farret
Summary: Measuring specific contact resistivity (pc) is crucial for interface engineering in high efficiency solar cells. The Transfer Length Method (TLM) is commonly used for evaluating layer sheet resistance (Rsheet) and pc, but it is not suitable for metal/Transparent Conductive Oxide (TCO) interface evaluation in silicon heterojunction (SHJ) cells. This study investigates the parameters that restrict current confinement within the TCO, including mid-gap trap density (Dit) at the a-Si:H/c-Si interface and the activation energy (Ea = Ec - EF) variation of a-Si:H contact layers.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: The phenomenon of ribbon lengthening in PV modules exposed to thermal cycling is not well explained in the literature. In this study, a three layers model is proposed to explain this effect, and the predictions of the model are validated through finite element method simulations and experiments. The results show that the model predictions are consistent with the indirect measurements, but not with the direct measurements. Additionally, it is inferred that the encapsulant plays a role after the solder failure.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Jean-Baptiste Charpentier, Philippe Voarino, Julien Gaume
Summary: This study investigates the problematic ribbon lengthening observed in PV modules exposed to high amplitude thermal cycling. A simplified system model is proposed and accurate predictions are obtained using the Finite Element Method. The results show that the thickness of the encapsulant has a substantial impact on the lengthening of the ribbons.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Catalan-Gomez, E. Martinez Castellano, M. Schwarz, M. Montes Bajo, L. Dorado Vargas, A. Gonzalo, A. Redondo-Cubero, A. Gallego Carro, A. Hierro, J. M. Ulloa
Summary: This study investigates the use of core-shell gallium nanoparticles as functional light scatterers on solar cells. By optimizing the nanoparticle size, the short-circuit current of the solar cells is significantly improved. The underlying physical mechanism is studied through optical measurements and simulations, and a method to reduce the plasmonic effect of the nanoparticles is demonstrated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
M. Gamel, G. Lopez, A. M. Medrano, A. Jimenez, A. Datas, M. Garin, I. Martin
Summary: In this study, a highly reflective ohmic contact to p-type c-Ge material is demonstrated, which can improve the efficiency of thermophotovoltaic devices. The experimental results show that this contact can simultaneously meet the requirements of good back surface passivation, low electrical resistivity, and high reflectivity. Moreover, simulations suggest that implementing these back contacts has the potential to achieve conversion efficiencies comparable to high-efficiency c-Ge TPV cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hongyang Wei, Qing Xu, Dongchu Chen, Min Chen, Menglei Chang, Xiufang Ye
Summary: This study prepared solar selective absorption films based on anodic aluminum oxide (AAO) photonic crystals using a unique electrodeposition method. The Co-Ag electrodeposited film exhibited superior solar selective absorption properties and thermal stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Ankit Kumar, Ankit Chauhan, Jordi Llobet, Helder Fonseca, Patricia C. Sousa, Carlos Calaza, Gil Shalev
Summary: This study found that decorating subwavelength arrays with SiO2 quasi-nanolenses (qNL arrays) can enhance the absorption of the solar spectrum. Optical absorption mechanisms in qNL arrays were investigated using near-field scanning optical microscopy (NSOM), revealing that the enhancement is a result of the combination of effective antireflection coating, increased optical interactions between adjacent dielectrics for elevated light trapping, and strong light concentration due to the presence of qNLs.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
S. Pingel, T. Wenzel, N. Goettlicher, M. Linse, L. Folcarelli, J. Schube, S. Hoffmann, S. Tepner, Y. C. Lau, J. Huyeng, A. Lorenz, F. Clement
Summary: This study demonstrates the potential to reduce silver consumption in highly efficient SHJ cells through fine-line screen printing using low temperature paste with various screens. The results show that using finer mesh allows for narrower grid fingers and lower resistance, leading to improved cell efficiency. Simulation results indicate that module wire configuration is crucial for reducing silver consumption.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Xibo He, Jun Qiu, Wei Wang, Yicheng Hou, Yong Shuai
Summary: This paper proposes a novel phase change material with high thermal conductivity and stability for fast photo-thermal conversion and storage. The experimental results demonstrate excellent durability and stability of the phase change material, with good performance in thermal conductivity and thermal storage efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Qingyuan Liu, Lin Wang, Zheng Liu, Guohua Liu
Summary: A new evaporating structure consisting of liquid marble with tunable nanowire array is proposed to enhance solar evaporation. The experiments show that the liquid marble with nanowire array exhibits outstanding evaporation performance, which has significant implications for seawater desalination or wastewater treatment.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
Hao Liu, Qiming Liu, Jinpei Liu, Yonggang Zhao, Yingjie Yu, Yue An, Ganghui Wei, Yanzheng Li, Yujun Fu, Junshuai Li, Deyan He
Summary: Moisture in the air is identified as the main cause of performance degradation in organic-inorganic hybrid solar cells. Exposure to air leads to the growth of thin oxide layer on the interface and the formation of silver sulfide, increasing the series resistance and decreasing the fill factor, thus degrading the cell performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Energy & Fuels
E. Blanco, P. Martin, M. Dominguez, P. Fernandez-Palacios, I. Lombardero, C. Sanchez-Perez, I. Garcia, C. Algora, M. Gabas
Summary: This study addresses the lack of optical parameters for p-type Ge wafers by determining the complex refractive indices of commercial Ge wafers with varying doping levels. The obtained data successfully reproduces the critical points associated with interband transitions and absorption features below the bandgap. The refractive indices were validated through experimental measurements and solar cell simulations.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)