Analysis of solder joint fracture under mechanical bending test

2004 ◽  
Author(s):  
K. Harada ◽  
S. Baba ◽  
Qiang Wu ◽  
H. Matsushima ◽  
T. Matsunaga ◽  
...  
Keyword(s):  
Solder Joint ◽  
Bending Test ◽  
Joint Fracture ◽  
Mechanical Bending

scholarly journals Digitally Patterned Mesoporous Carbon Nanostructures of Colorless Polyimide for Transparent and Flexible Micro-Supercapacitor

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2547
Author(s):  
Hyeonwoo Kim ◽  
Suwon Hwang ◽  
Taeseung Hwang ◽  
Jung Bin In ◽  
Junyeob Yeo
Keyword(s):  
Carbon Nanostructures ◽  
Specific Area ◽  
Bending Test ◽  
Chemical Compositions ◽  
Carbon Structure ◽  
Carbon Structures ◽  
Direct Laser ◽  
Mechanical Bending ◽  
Minimal Reduction ◽  
High Flexibility

Here, we demonstrate the fabrication of a flexible and transparent micro-supercapacitor (MSC), using colorless polyimide (CPI) via a direct laser writing carbonization (DLWC) process. The focused laser beam directly carbonizes the CPI substrate and generates a porous carbon structure on the surface of the CPI substrate. Fluorine, which is one of the chemical compositions of CPI, can enhance the specific area and the conductivity of the carbon electrode by creating micropores in carbon structures during carbonization. Thus, the fabricated carbonized CPI-based MSC shows enhanced specific capacitance (1.20 mF at 10 mV s−1) and better transmittance (44.9%) compared to the conventional PI-based MSC. Additionally, the fabricated carbonized CPI-based MSC shows excellent cyclic performance with minimal reduction (<~10%) in 3000 cycles and high capacitance retention under mechanical bending test conditions. Due to its high flexibility, transparency, and capacitance, we expect that carbonized CPI-based MSC can be further applied to various flexible and transparent applications.

scholarly journals Moisture-Assisted Formation of High-Quality Silver Nanowire Transparent Conductive Films with Low Junction Resistance

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 671
Author(s):  
Lipeng Zhou ◽  
Yuehui Hu ◽  
Hao Gao ◽  
Youliang Gao ◽  
Wenjun Zhu ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Capillary Condensation ◽  
Silver Nanowire ◽  
Environmental Stability ◽  
Bending Test ◽  
Commercial Application ◽  
Junction Resistance ◽  
Transparent Conductive Film ◽  
Conductive Film ◽  
Mechanical Bending

Silver nanowire (AgNWs) transparent conductive film (TCF) is considered to be the most favorable material to replace indium tin oxide (ITO) as the next-generation transparent conductive film. However, the disadvantages of AgNWs, such as easy oxidation and high wire-wire junction resistance, dramatically limit its commercial application. In this paper, moisture treatment was adopted, and water was dripped on the surface of AgNWs film or breathed on the surface so that the surface was covered with a layer of water vapor. The morphology of silver nanowire mesh nodes is complex, and the curvature is large. According to the capillary condensation theory, water molecules preferentially condense near the geometric surface with significant curvature. The capillary force is generated, making the wire-wire junction of AgNWs mesh bond tightly, resulting in good ohmic contact. The experimental results show that AgNWs-TCF treated by moisture has better conductivity, with an average sheet resistance of 20 Ω/sq and more uniform electrical properties. The bending test and adhesion test showed that AgNWs-TCF treated by moisture still exhibited good mechanical bending resistance and environmental stability.

Evaluation of elastic, elastic-plastic properties of thin Pt wire by mechanical bending test

2010 ◽  
Vol 103 (2) ◽  
pp. 493-496 ◽  
Author(s):  
S. K. Deb Nath ◽  
Hironori Tohmyoh ◽  
M. A. Salam Akanda
Keyword(s):  
Bending Test ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Mechanical Bending

Comparison of solder joint fracture behavior in Arcan and DCB specimens

2015 ◽  
Vol 143 ◽  
pp. 47-62 ◽  
Author(s):  
Amir Nourani ◽  
Saeed Akbari ◽  
Jan K. Spelt
Keyword(s):  
Solder Joint ◽  
Fracture Behavior ◽  
Joint Fracture

scholarly journals Three-point and four-point mechanical bending test modeling and application in solar cells

2019 ◽  
Vol 68 (20) ◽  
pp. 208801
Author(s):  
Ren He ◽  
Ying-Ye Li ◽  
Jing-Xin Chen ◽  
Xue-Ling Zhao ◽  
Huan Tang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bending Test ◽  
Mechanical Bending

scholarly journals Transparent Electrodes with Nanotubes and Graphene for Printed Optoelectronic Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Marcin Słoma ◽  
Grzegorz Wróblewski ◽  
Daniel Janczak ◽  
Małgorzata Jakubowska
Keyword(s):  
Aging Process ◽  
Carbon Nanomaterials ◽  
Accelerated Aging ◽  
Spray Coating ◽  
Negative Influence ◽  
General Purpose ◽  
Bending Test ◽  
Optical Parameters ◽  
Transparent Electrodes ◽  
Mechanical Bending

We report here on printed electroluminescent structures containing transparent electrodes made of carbon nanotubes and graphene nanoplatelets. Screen-printing and spray-coating techniques were employed. Electrodes and structures were examined towards optical parameters using spectrophotometer and irradiation meter. Electromechanical properties of transparent electrodes are exterminated with cyclical bending test. Accelerated aging process was conducted according to EN 62137 standard for reliability tests of electronics. We observed significant negative influence of mechanical bending on sheet resistivity of ITO, while resistivity of nanotube and graphene based electrodes remained stable. Aging process has also negative influence on ITO based structures resulting in delamination of printed layers, while those based on carbon nanomaterials remained intact. We observe negligible changes in irradiation for structures with carbon nanotube electrodes after accelerated aging process. Such materials demonstrate a high application potential in general purpose electroluminescent devices.

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