Article
Chemistry, Analytical
Yuanbin Zhang, Zhonghang Yuan, Bin Fang, Liying Gao, Zhiyuan Chen, Guosheng Su
Summary: Due to the strong plasticity of Inconel 718 and the significant size effect of micromachining, a large number of burrs will be produced in traditional processing. The addition of ultrasonic vibration during machining can reduce the burr problem. The mechanism of burr generation in traditional micromilling (TMM) and ultrasonic vibration-assisted micromilling (UVAMM) was analyzed by simulation, and verified by corresponding experiments. It is found that applying high-frequency ultrasonic vibration in the milling feed direction can reduce cutting temperature and cutting force, improve chip breaking ability, and reduce burr formation.
Article
Polymer Science
Bilal Anjum Ahmed, Uzair Nadeem, Abbas Saeed Hakeem, Anwar Ul-Hamid, Mohd Yusuf Khan, Muhammad Younas, Hasan Aftab Saeed
Summary: This study focuses on optimizing the FDM process and post-process parameters to maximize the tensile strength of PLA samples. The analysis shows that the gyroid infill pattern and a 90-degree Celsius annealing cycle result in the highest ultimate tensile strength.
Article
Engineering, Civil
Shulan Jiang, Ao Zhang, Xiaobin Zhan, Hongyong Jiang
Summary: This study investigates the design and laser etching of surface microtextures on Al substrate to improve adhesive performance. Laser parameters and textures were thoroughly studied, and the results showed that power is the most significant factor in improving shear strength. The optimal design achieved a 1225% improvement in shear strength.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Ksenija Nikolic, Vitoria Mattos Ferreira, Loic Malet, Tom Depover, Kim Verbeken, Roumen H. Petrov
Summary: This work characterized the microstructure of a damaged bearing from the field to better understand the microstructural features behind the formation of White Etching Cracks (WEC) in bearings. The microstructural characterization of the altered white etching area (WEA) involved conventional electron backscattered diffraction (EBSD), transmission electron microscopy (TEM), and transmission Kikuchi diffraction (TKD). The results showed that the orientation of detectable grains within WEA is similar to that of the bulk material, and WEA consists of small spherical grains (average 30 nm) with significant variation in grain orientation, indicating recrystallization had occurred.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Chen-Hsiang Ling, Chun-Yi Chou, Tsai-Fu Chung, Jing-Jong Shyue, Jer-Ren Yang, Miin-Jang Chen
Summary: Layer-by-layer conformal atomic layer etching (cALE) technique achieves precise etching of Ge with self-limiting and self-stop processes, showing linear dependence of etching depth on cALE cycles, accurate etching rate, and low surface roughness without damaging the Ge surface.
SURFACES AND INTERFACES
(2022)
Article
Geochemistry & Geophysics
Jessica A. Lueders-Dumont, Atleigh G. Forden, Emma R. Kast, John A. Mohan, Benjamin D. Walther, Daniel M. Sigman, Bess B. Ward
Summary: The use of nitrogen isotopes can effectively track the life history of organisms following dietary changes. Otoliths and tissues show different response times to new diets, with slower growth tissues exhibiting larger variations. Further optimization of sampling methods may improve resolution for tracking diet changes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Chemistry, Physical
David Sommer, Babette Goetzendorfer, Cemal Esen, Ralf Hellmann
Summary: The study evaluates fundamental properties of a hybrid manufacturing approach that combines selective laser melting and high speed milling, characterizes typical geometrical features and concludes on a catalogue of design rules. The hybrid approach demonstrates higher geometric accuracy and improved surface roughness compared to sole selective laser melting, with specific design rules identified for basic geometric elements.
Article
Geochemistry & Geophysics
Sean Jones, Barry Kohn, Andy Gleadow
Summary: This article presents a series of experiments on monazites from Victoria, Australia, to further understand their fission track etching properties. The results show that the etchant can penetrate most of the etchable range of the fission tracks and reach the maximum etched region within a certain time.
AMERICAN MINERALOGIST
(2022)
Article
Materials Science, Multidisciplinary
Huarong Yang, Tong-Huai Cheng, Huijia Ouyang, Qian Xin, Yiyuan Liu, Miao Meng, Hua Yu Feng, Feng Luo, Wenxiang Mu, Zhitai Jia, Xutang Tao
Summary: This study introduces focused ion beam (FIB) processing to etch and thin beta-Ga2O3 microflakes, revealing the impact of thickness on phototransistor performance. The enhanced phototransistor produced using this method demonstrates excellent photo-electric properties and overcomes the limitations of traditional fabrication methods.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jianbin Tang, Ruiqing Zou, Xin Zhang, Yun Zhong, Mengyao Li, Yujia Feng, Xinpeng Wei, Jian Wang
Summary: This study reports the successful construction of an outstanding superhydrophobic material with self-cleaning, antifouling, and directional transportation functions. The microstructure evolution and composition analysis reveal the mechanism of its formation. The material exhibits high contact angle, low sliding angle, high porosity, low surface free energy, and adhesion work.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Jinzhu Zhou, Weijian Zhou, Yue Zhang, Yipeng Wang, Tieying Ma
Summary: Si-based double-layer overlapping open microchannels have been designed and fabricated for microfluidic applications. The top channel has been ingeniously designed in both T-shaped and X-shaped configurations along the <100> direction, while the bottom channel has been prepared along the <110> direction, allowing it to be semi-buried into the top channel at a 45-degree angle. An undercut characteristic of 25% TMAH has been utilized to create a unique overlapping microchannel structure by removing material from the overlapping part of the two layers of channels. This results in intersecting microchannels that are not connected, providing significant structural advantages over traditional single-layer microchannels. With this innovative design, two different substances can be delivered independently and efficiently in the same area.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Multidisciplinary
Xiya Chen, Bao Lei, Yong Zhu, Jiadong Zhou, Meng Gao, Zheng Liu, Wei Ji, Wu Zhou
Summary: Grain boundaries play a significant role in the electronic structure and magnetic properties of transition metal dichalcogenides. This study investigates the coherent grain boundaries in monolayer ReSe2 and reveals their impact on the local electronic structures and magnetic properties, providing insights into the structure-property relationships in lower-symmetry TMDs.
ACS MATERIALS LETTERS
(2021)
Article
Polymer Science
Ying Yan, Yu Mao, Bo Li, Ping Zhou
Summary: Thermoplastic polymers such as PMMA, PEEK, and PI are polymer materials with good mechanical strength properties and are widely used in aerospace, optical engineering, and microfluidics. This study analyzed the mechanical properties and machinability of these polymers, showing that they have good mechanical properties and machinability. The surface quality of brittle removal is generally superior to the viscoelastic state.
Article
Engineering, Manufacturing
Artem A. Osipov, Gleb A. Iankevich, Armenak A. Osipov, Anastasiya B. Speshilova, Anna A. Karakchieva, Ekaterina Endiiarova, Svetlana N. Levina, Sergey Karakchiev, Sergey E. Alexandrov
Summary: This study presents the results of an in-depth investigation into the plasma-chemical etching process of single-crystal silicon carbide in SF6/O-2 ICP, examining the influence of different parameters and utilizing OES technique for optimization. Computational simulation was used to study the impact of microtrenches on the diaphragm, showing a significant effect on the mechanical characteristics.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Biomedical
Xintian Wang, Hao Cui, Zhaoqiang Chen, Li Wang, Jun Chen, Mingdong Yi, Guangchun Xiao, Jingjie Zhang, Hui Chen, Chonghai Xu
Summary: The study proposed a new method of using focused ion beam to selectively create nanoscale microscale structures on the surface of YSZ materials, and investigated the sputtering yield, surface damage, and energy loss using Monte Carlo method. Experiments were conducted to optimize processing parameters, resulting in improved quality of deep grooves with decreasing ion beam current.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
