Article
Engineering, Chemical
Swathi K. Manchili, Johan Wendel, Eduard Hryha, Lars Nyborg
Summary: The study explores the addition of iron nanopowder to conventional iron powder to improve sinter density, with the bimodal powder mixture containing 25% nanopowder showing the highest green density. The apparent activation energy for sintering decreased with an increase in nanopowder content, reflecting in the values of work of sintering.
Article
Engineering, Chemical
M. Krinitcyn, N. Toropkov, A. Pervikov, E. Glazkova, M. Lerner
Summary: This study investigated a bimodal 316L steel powder obtained by electric explosion of wire (EEW), which is formed directly during the explosion process and does not require mixing steps. The powders were obtained at different explosion energy densities, resulting in different micro: nano ratios. The study discussed the morphology, chemical composition, homogeneity, and rheological properties of the bimodal powder feedstock, as well as compared properties with bimodal and micron powder.
Article
Materials Science, Multidisciplinary
Al Basir, Abu Bakar Sulong, Nashrah Hani Jamadon, Norhamidi Muhamad, Ukwueze Bonaventure Emeka
Summary: Powder injection molding (PIM) has evolved into micro-powder injection molding (mu PIM) and become a key manufacturing technique for producing components in electronic, automobile, and biomedical fields. This article reviews the important process parameters for fabricating parts with different materials using these techniques, and provides a brief discussion on future research guidelines in two-component macro and micro powder injection molding.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Mohd Yusuf Zakaria, Mohd Ikram Ramli, Abu Bakar Sulong, Norhamidi Muhamad, Muhammad Hussain Ismail
Summary: This study identified critical PIM parameters for processing porous alloy titanium-hydroxyapatite composites via the space holder method, producing porous parts with a porosity level of 37.03%. The combination of PIM and the space holder method was found to be a promising technique for manufacturing near net-shaped porous titanium-hydroxyapatite composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Sylvain Badie, Rimy Gabriel, Doris Sebold, Robert Vassen, Olivier Guillon, Jesus Gonzalez-Julian
Summary: Near-net shape components composed of monolithic Ti2AlC and composites with Al2O3 fibers were fabricated through powder injection molding and sintering processes with relative densities up to 98.6% and 97.2% achieved using field assisted sintering technology. The addition of Al2O3 fibers did not significantly enhance the hardness or toughness of the materials, but the composites showed improved densification compared to monolithic parts.
Article
Chemistry, Physical
Grzegorz Matula, Aleksandra Szatkowska, Krzysztof Matus, Blazej Tomiczek, Miroslawa Pawlyta
Summary: The study fabricated cobalt-chromium-molybdenum alloy samples using the PIM method, obtaining components with good mechanical properties through thermal degradation and sintering.
Article
Materials Science, Multidisciplinary
Atefeh A. Tafti, Vincent Demers, Seyed Mohammad Majdi, Guillem Vachon, Vladimir Brailovski
Summary: Low-pressure powder injection molding (LPIM) is a cost-effective technology for producing intricate small metal parts, and this study aims to investigate the potential of manufacturing irregular commercial iron powder injection molded parts. The research found that the variation in pre-sintering temperature can affect the sintered density and pore characteristics.
Article
Polymer Science
Anton V. Mityukov, Vitaly A. Govorov, Alexander Ya. Malkin, Valery G. Kulichikhin
Summary: Powder injection molding (PIM) is a modern technology for processing different materials, and using bimodal compositions of particles can increase the particle content in the final products and create favorable rheological properties for the technological process. This method also allows for a significant increase in the solid phase content for PIM technology.
Article
Materials Science, Ceramics
Biswajit Baruah, Rahul Anand, Shantanu K. Behera
Summary: The Master Sintering Curve (MSC) was used to estimate the apparent activation energies of undoped Al2O3 and ZrO2-doped Al2O3 samples in the intermediate density range. It was found that ZrO2 doping at low concentrations affected the activation energy of sintering of Al2O3.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Jian Dong, Vaclav Pouchly, Mattia Biesuz, Vaclav Tyrpekl, Monika Vilemova, Milad Kermani, Mike Reece, Chunfeng Hu, Salvatore Grasso
Summary: The thermally-insulated Ultra-fast High temperature Sintering (UHS) technology utilizes a fiberboard insulator to reduce energy consumption by 40% compared to the reference set-up. With an ultrafast heating rate, dense and fine-grained microstructures are achieved within 60 seconds.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Gabriel Kerbart, Charles Maniere, Christelle Harnois, Sylvain Marinel
Summary: Sintering is a crucial step in processing high-performance ceramics, with the master sintering curve (MSC) commonly used to explore sintering kinetics. However, research on MgAl2O4 spinel has shown dissimilar growth responses, challenging traditional MSC theories. Park's MSC theory has been applied and compared to conventional approaches for determining activation energy in cases of differing grain growth trajectories.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Feng Shang, Zhiyong Wang, Xiaoqiu Chen, Zuchun Ji, Shubin Ren, Xuanhui Qu
Summary: UNS S32707 hyper-duplex stainless steel (HDSS) was prepared by powder injection molding (PIM) and supersolidus liquid-phase sintering from powder prepared by a plasma rotating-electrode process. The sintered parts exhibited ideal relative density and nitrogen content when sintered at 1400 degrees C for 1.5 h. After solution treatment, the material showed improved mechanical properties.
Article
Engineering, Manufacturing
Issa Rishmawi, Allan Rogalsky, Mihaela Vlasea, Amin Molavi-Kakhki
Summary: Master sinter curves (MSC) are models used to predict the densification behavior of powder compacts exposed to heat in a controlled nitrogen-hydrogen atmosphere. In this study, solid-state sintering MSC models were developed for two types of AISI 4340 powders: water-atomized and gas-atomized, which were used in binder jetting additive manufacturing. The water-atomized powder was found to have a larger activation energy value and slightly slower densification rate compared to the gas-atomized powder.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
Nurul Nadiah Mahmud, Farah Atiqah Abdul Azam, Mohd Ikram Ramli, Farhana Mohd Foudzi, Kei Ameyama, Abu Bakar Sulong
Summary: This study presents a promising alternative approach in powder injection molding (PIM) process by utilizing irregular-shaped and bimodal size powder in Ti6Al4VHA composite. The irregular-shaped Ti6Al4V-HA exhibits good rheological behavior and low viscosity, producing crack-free parts with high relative density of 95% after sintering, showing excellent osseointegration properties. The findings suggest the suitability of irregular-shaped Ti6Al4V-HA as a useful alternative material for biomedical applications, especially in bone implantation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Hanlyun Cho, Jae Man Park, Junsuk Rho, Seong Jin Park
Summary: The study focused on investigating warpage defects in PIM manufacturing, revealing that the debinding heating rate has a dominant effect on structure warping and should be optimized accordingly.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Engineering, Manufacturing
Joo Won Oh, Jae Man Park, Da Seul Shin, Jaebum Noh, Seong Jin Park
MATERIALS AND MANUFACTURING PROCESSES
(2019)
Article
Materials Science, Multidisciplinary
Ji Hyun Moon, Seung Mi Baek, Seok Gyu Lee, Yujin Seong, Auezhan Amanov, Sunghak Lee, Hyoung Seop Kim
MATERIALS RESEARCH LETTERS
(2019)
Article
Materials Science, Multidisciplinary
Dong Yong Park, Da Seul Shin, Hyeon Jeong Park, Young-Jin Baik, Yong Jun Oh, Seong Jin Park
MATERIALS CHARACTERIZATION
(2019)
Article
Materials Science, Ceramics
Chang Woo Gal, Joo Won Oh, Gi Woung Song, Da Seul Shin, Seong Jin Park
CERAMICS INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
Da Seul Shin, Suk Hyun Kim, Joo Won Oh, Im Doo Jung, Woo Seok Yang, Chi Hun Lee, Hyeok Joon Kwon, Jin Mo Koo, Seong Jin Park
METALS AND MATERIALS INTERNATIONAL
(2019)
Article
Materials Science, Multidisciplinary
Yujin Seong, Dami Yim, Min Ji Jang, Jeong Min Park, Seong Jin Park, Hyoung Seop Kim
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Da Seul Shin, Joo Won Oh, Im Doo Jung, Hwi Jun Kim, Min Woo Lee, Goo Won Noh, Woo Seok Yang, Seong Jin Park
METALS AND MATERIALS INTERNATIONAL
(2020)
Article
Nanoscience & Nanotechnology
Jin Myoung Jeon, Jeong Min Park, Ji-Hun Yu, Jung Gi Kim, Yujin Seong, Sun Hong Park, Hyoung Seop Kim
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Materials Science, Ceramics
Jae Man Park, Da Seul Shin, Jun Sae Han, Joo Won Oh, Sung Cheol Park, Yong Dae Kim, Jin Man Jang, Won Sik Lee, Seong Jin Park
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Da Seul Shin, Im Doo Jung, Joo Won Oh, Woo Seok Yang, Jun Sae Han, Min Woo Lee, Hwi Jun Kim, Seong Jin Park
MATERIALS CHEMISTRY AND PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Jae Man Park, Sung Cheol Park, Da Seul Shin, Jong Hyun Kim, Hanlyun Cho, Woo Seok Yang, Seong Ho Son, Seong Jin Park
Article
Nanoscience & Nanotechnology
Dong Hyuk Kim, Yujin Seong, Jung Gi Kim, Jongwon Lee, Min Hong Seo, Hyunsang Hwang, Hyoung Seop Kim
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Im Doo Jung, Da Seul Shin, Doohee Kim, Jungsub Lee, Min Sik Lee, Hye Jin Son, N. S. Reddy, Moobum Kim, Seung Ki Moon, Kyung Tae Kim, Ji-Hun Yu, Sangshik Kim, Seong Jin Park, Hyokyung Sung
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
