Search results

Biomimetic Design and Manufacturing of Anti-Erosion Functional Surfaces Inspired from Desert Scorpion Zhiwu Han1, a, Mingkang Yang1, b, Wei Yin2, c, Junqiu Zhang1, d * 1Key Laboratory of Bionics Engineering of Ministry of Education, Jilin University, Changchun 130022, China 2State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China aemail: zwhan@jlu.edu.cn, bemail: yangmk14@mails.jlu.edu.cn, cemail: yinwei@mail.tsinghua.edu.cn, demail: junqiuzhang@jlu.edu.cn Keywords: desert scorpion, anti–erosion, biomimetic surfaces design and manufacturing, simulation, bionic centrifugal fan blades Abstract: Sand erosion is a phenomenon that solid particles impinging to a wall cause serious mechanical damages to its surface.
It has been recognized as a serious problem in various engineering applications, including helicopter rotor blades, impeller blades, aircraft engine blades, missile components, etc.
Hence, researchers in material erosion, including composites[4-6], surface hardening[7,8], material modification[9,10] and other fields[11] are trying their best to solve the concerning issue from the viewpoint of saving materials, reducing energy consumption and prolonging the material life.
Although these methods improved the wear resistance of materials to some extent, unnegligiblely, it always results in cost increasing.
Finally, we installed the sample blades in the centrifugal fan and explored their performance. 2 Materials and Methods 2.1 Animals and morphological observation Adult specimens of the desert scorpion A. australis and the Asia rainforest scorpion H. spinifer, were purchased from pet suppliers.

Performance of Salak (Salacca zalacca) Seed Extract to Green Corrosion Inhibitor on AISI 1040 Steel Muhammad Rifani1,a, Daffa Irsyad D.2,b, Ade Wahyu Yusariarta3,c, Jatmoko Awali4,d, Fredy Kurniawan5,e, Masato Tominaga6,f, Yusairie Mohd7,g, Yunita Triana8,h* 1,2,3,4,8Department of Material and Metallurgical Engineering, Institut Teknologi Kalimantan, Balikpapan 76127, Indonesia 5Department of Chemistry, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia 6Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University, 840-8502 7Faculty of Applied Science, Universiti Teknologi MARA, Shah Alam, Selangor 40450, Malaysia a06191042@student.itk.ac.id, b06191017@student.itk.ac.id, cadewahyu27@lecturer.itk.ac.id, djatmoko.awali@lecturer.itk.ac.id, efredy@chem.its.ac.id, fmasato@cc.saga-u.ac.jp, gyusairie@uitm.edu.my, hnita@lecturer.itk.ac.id Keywords: AISI, Corrosion, Green, Inhibitor, Salacca zalacca, Seed Abstract.
These compounds have been widely studied and can be used as materials to inhibit the process of corrosion [28], [29].
Experimental Materials The metal specimen used in this study was AISI 1040 steel.
S., Elboujdaini, M., Heimann, Oxide Scale Behavior in High Temperature Metal Processing Corrosion and Corrosion Control Corrosion Handbook - Corrosive Agents and Their Interaction with Materials Corrosion Inspection and Monitoring Corrosion Prevention and Protection Plasma Spray Coati. 2012
Zhang, “Organic Compounds as Corrosion Inhibitors for Carbon Steel in HCl Solution: A Comprehensive Review,” Materials (Basel)., vol. 15, no. 6, pp. 1–59, 2022, doi: 10.3390/ma15062023.

It is widely used for different industrial engineering applications, either as individual metal or as an alloy.
Acknowledgement The authors would like to appreciate the financial support and contribution of the following: The Research and Innovation Directorate, Department of Mechanical Engineering, Institute for NanoEngineering Research (INER) and Department of Chemical, Metallurgical and Materials Engineering of the Faculty of Engineering and Built Environment, Tshwane University of Technology, Pretoria, South Africa.
Lethabane, "A Review on Sintered Nickel based Alloys," in Proceedings of the World Congress on Engineering, 2017, vol. 2
Liu et al., "Equiaxed Ti-based composites with high strength and large plasticity prepared by sintering and crystallizing amorphous powder," Materials Science and Engineering: A, vol. 650, pp. 171-182, 2016
Li, "Ultrafine-grained copper prepared by spark plasma sintering process," Materials Science and Engineering: A, vol. 476, no. 1-2, pp. 201-205, 2008

Gallium oxide is one of the transparent conducting metal oxide materials with an n-type semiconductor property because of oxygen vacancy in the crystal in spite of high energy band gap [4, 5].
Materials and Methods Preparation of films.
From FE-SEM, HR-XRD and UV-vis diffuse reflectance results, it was observed that H2 flow rate played key role in controlling nanostructure morphology, increased step coverage of the substrate, increased diffraction peak width, and engineered the bandgap of the grown films.
Hou, Capacitive behavior of single gallium oxide nanobelt, Materials 8 (2015) 5313–5320
Yagi, Growth of β-gallium oxide films and nanostructures by atmospheric pressure CVD using gallium and water as source materials, Phys.

Molecule Induced Strong Coupling between Ferromagnetic Electrodes of a Molecular Spintronics Device Pawan Tyagi Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky-40506, USA Address for correspondence: School of Engineering and Applied Science, University of the District of Columbia, Washington DC-20008, USA, email: ptyagi@udc.edu Keywords: Molecular spintronics, molecular electronics, spin photovoltaic devices, magnetic tunnel junctions, molecular magnets Abstract.
It is noteworthy that other materials like NiFe and Ta were highly stable during the OMC treatment.
Hinds and the Department of Chemical and Materials Engineering, University of Kentucky for enabling his PhD research work presented in this paper.
Verdaguer, Rational synthesis of molecular magnetic materials: a tribute to Olivier Kahn.
Buschow, Handbook of Magnetic Materials, Elsevier, 2006

Introduction Advanced composite laminates have been extensively used in many structural applications, especially in aerospace engineering due to their strength/weight ratio relative to metallic materials.
Composite materials and structure can delamination along weak interfaces by failure modes that create a large-scale fracture process zone.
Piezoelectric materials (such as PZT) and structures have received a deserving attention in the recent years, in virtue of their self-monitoring and self-controlling properties.
In many engineering applications, these piezoelectric smart structures may experience various impact events [14].
The friction between fiber and matrix material of this pull-out process contributes to the fracture resistance of the crack.

Damper Optimization Design of High-Speed Energy Storage Flywheel Shafting with a Single Point Flexible Support TANG Changliang1,a, HAN Dongjiang1,b, YANG Jinfu1,c and DAI Xingjian2,d 1 Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China 2 Department of Engineering Physics, Tsinghua University, Beijing, China atangcl@iet.cn, bhandongjiang@iet.cn, cyangjinfu@iet.cn, ddaixj@mail.tsinghua.edu.cn Keywords: Single point flexible support; Energy storage flywheel; Gyroscopic effect; Modal damping ratio; Oil damper.
In engineering practice, the flywheel rotor inevitably has mass unbalance.
In engineering practice, one of the easiest and the most effective method of increasing the damping coefficient is increasing viscosity of the oil in the damper.
Bitterly, in: IEEE Aerospace and Electronic Systems Magazine, 13 (8): 13-16. (1998) [2] Xingjian Dai, Zupei Shen and Haigang Wei, in: International Journal of Mechanical Sciences, 43 (11):2525-2540. (2001) [3] Li Zhang, Heng Zhang, in: Ordnance Material Science and Engineering, 24 (5): 63-65. (2001) (In Chinese) [4] D.
Schainker, in: IEEE Power Engineering Society General Meeting, 2: 2309–2314. (2004) [6] B.

Synthesizing Alkaline Earth Metal Hydroxides Nanoparticles through an Innovative, Single-Step and Eco-Friendly Method Giuliana Taglieri1,a*, Valeria Daniele1b*, Ludovico Macera1,c 1Department of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale E.
Introduction Nanomaterials have much larger and more active surface areas than bulk materials.
Materials and Methods Materials Calcium chloride (CaCl2), Magnesium chloride (MgCl2), Strontium chloride hexahydrate (Cl2Sr∙6H2O), Barium chloride dihydrate (BaCl2∙2H2O) supplied by Merck; ion-exchange resin (Dowex Monosphere 550A, Sigma-Aldrich), in the form of translucent spherical beads characterized by a particle size equal to 590±50 µm; 2-propanol (>99.8 %, Sigma Aldrich); deionized water, purified by a Millipore Organex system (R ≥ 18 MW cm), characterized by a specific conductivity =1μS/cm.
Fabiola Ferrante, Department of Industrial and Information Engineering and Economics (University of L’Aquila) for her kind help with the FTIR measurements.
Gomez-Villalba, et al., New nanomaterials for applications in conservation and restoration of stony materials: A review, Materiales de Construcción 67 (325) (2017) e107

Murch2,a 1Retired from: Institut für Materialphysik, Universität Münster, Germany Now: Berghof 3, 73635 Obersteinenberg, Germany 2Centre for Mass and Thermal Transport in Engineering Materials, School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW 2308, Australia agraeme.murch@newcastle.edu.au Abstract.
Myssore Dayananda Professor Mysore Dayananda is professor emeritus of Materials Engineering of the Purdue University in West Lafayette, Indiana, USA.
Yongho Sohn Professor Yongho Sohn is professor in the Department of Materials Science and Engineering at the University of Central Florida, Orlando, USA.
He is now Professor Emeritus in the Department of Mechanical Engineering and Materials Science of the Duke University at Durham, USA, Teh Yu Tan conducted fundamental research in materials science and processes related to electronic materials.
Paul Shewmon (born 1930) was professor in the Department of Materials Science and Engineering at the Ohio State University.

Enhanced diffusion in γ-Fe and Au by vacancies induced under elevated hydrogen pressure Yoshihiro Yamazaki 1,a and Yoshiaki Iijima 2,b 1 Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan 2 Department of Materials Science and Engineering, Faculty of Engineering, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan a yamazaki@material.tohoku.ac.jp, biijima@iwate-u.ac.jp Keywords: diffusion enhancement, hydrogen-induced vacancy, elevated hydrogen pressure, γ-iron, Gold, impurity diffusion, interdiffusion Abstract Diffusion in a metal under an elevated hydrogen pressure is interesting in view of the fact that the diffusion is enhanced owing to the injection of a large amount of vacancies into the metal.
The activation volume is a key to discuss the mechanism of diffusion and it can be obtained from the pressure dependence of the diffusion coefficient using the following relations.
Iijima: Proceedings of Fourth Pacific Rim International Conference on Advanced Materials and Processing(PRICM4), Hanada S, Zhong Z, Nam SW, Wright RNeds.