Materials Literature
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Fatigue properties of parts fabricated by laser powder bed fusion, a kind of additive manufacturing, are inferior to those of conventional ways. Defects and inclusions are the causes of low fatigue properties, but the effect is not clarified. Inconel 718 specimens were fabricated by laser powder bed fusion. Cross-sect…
Telah dilakukan penelitian yang bertujuan untuk mengetahui pengaruh komposisi serbuk kayu dengan serbuk kulit kakao pada papan partikel bertulang anyaman bambu terhadap sifat fisis dan mekanis. Perbandingan komposisi bahan pengisi (serbuk kayu : serbuk kulit kakao) yang digunakan yaitu 70%:0%, 50%:20%, 35%:35%, 20%:50…
Electrically conductive nanocomposites present opportunities to replace metals in several applications. Usually, the electrical properties emerging from conductive particles and the resulting bulk values depend on the micro/nano scale morphology of the particle network formed during processing. The final electrical pr…
Telah dilakukan penelitian tentang pengaruh densitas panel serat ampas tebu terhadap koefisien absorbsi bunyi dan impedansi akustik. Metode yang digunakan yaitu metode tabung pada komposit berbahan dasar serat ampas tebu dengan matriks resin epoksi. Material komposit tersebut diberi perlakuan densitas yang berbeda unt…
Changing the temperature of a substance can stimulate dramatic changes of its state. These changes can be intermolecular (physical) and intramolecular (chemical) in nature. Physical changes occur without breaking intramolecular bonds, and lead to transitions between the four major phases: gas, liquid, crystal, and gla…
Abstract High-explosive containment vessels are often designed for repeated use, implying predominately elastic material behavior. Each explosive test imparts an impulse to the vessel wall. The vessel subsequently vibrates as a result of the internal blast loading, with amplitude diminishing exponentially in time afte…
Telah dilakukan penelitian mengenai pengaruh waktu ultrasonikasi terhadap sifat mekanik selulosa serat pinang dengan variasi waktu 30, 60, 90, 120 menit dan perlakuan alkalisasi NaOH yaitu 18%. Karakterisasi fasa dan ukuran kristal selulosa menggunakan XRD (X- Ray Diffractometer). Karakterisasi morfologi dan ukuran pa…
Abstract Interaction of electromagnetic (EM) waves with asymmetric triangular apertures and lattices are studied theoretically with analytical solutions and numerical simulations, where the physical symmetry and degeneracy are removed and the diffraction show distinct angular and spatial dependence on the incident EM-…
Nickel films formed on the surface of zirconium alloys are often used to protect materials against hydrogen penetration. Hydrogen adsorption on nickel is faster since the latter actively interacts with hydrogen, oxidizes and forms a protective film. The goal of the study is to develop a method providing control of hyd…
The paper considers the use of both traditional powdered carbon materials (graphite, soot, charcoal, shungite) and new carbon nanomaterials (nanodiamonds, fullerene, nanotubes, graphene) as a dispersed reinforcing phase in aluminum matrix composites (AMCs), and as reagents for the synthesis of titanium carbide (TiC) r…
Fused deposition modeling (FDM) with a 3D printer, one of so-called “Additive Manufacturing (AM)”, is a promising advanced industrial production method. However, there are much difficulty in the fabrication of dense ceramics using a FDM-type 3D printer; i) preparation of “filament” used for supplying raw materials to…
Abstract Patterned polydimethylsiloxane (PDMS) is an important structure for soft lithography. Various materials have been deployed as mold for patterning PDMS. Anodized nanotubular array has been sought after as cost‐effective alternative for textured silicon. An array of TiO2 nanotubes with characteristic diameter ≈…
This work presents ab initio study of the structural, electronic, magnetic and mechanical properties of Fe2NiAl[Formula: see text]GaxHeusler compounds with variable concentrations ([Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]) of Ga. Calculations have perfo…
This paper proposes a new approach for power transformers dissolved gas analysis (DGA) using Statistical Machine Learning Techniques and Neural Networks to compose a stairway model which performs analysis in three levels in order to check the existence of faults and which type it most probably is. The proposed approac…
The zinc (Zn)-type compound zinc stannate (Zn2SnO4) is critical in the field of thin-film solar cells and photocatalysis. In this study, a new composite nanomaterial zinc stannate/tin (IV) oxide (SnO2) was synthesised through a high-temperature synthesis spray process. The electrochemical properties of the samples wer…
Abstract Carbon‐centered radicals are usually reactive and there are only few stable heteroatom‐centered organic radicals. Herein, we report a nitrogen‐centered bis(imino)perylene dimer based diradicaloid 2Per‐2 N, which has a large diradical character (y0=72%) but still shows reasonable stability due to kinetic block…
The mechanical aspects of deformation-induced surface roughening inherent in microstructural inhomogeneity are studied numerically using single inclusion models. Three-dimensional finite-element calculations of uniaxial tension are performed for a set of single inclusion models where a cubic-shaped inclusion is embedd…
Linariifolioside II (1) and (2S)-2-hydroxy-5-oxoproline methyl ester (2), two new compounds along with 13 known compounds were obtained from the aerial part of Pseudolysimachion linariifolium Holub subsp. dilatatum (Nakai & Kitag.) D.Y. Hong. Their chemical structures were revealed mainly through NMR and MS data. The…
The field of optogenetics uses genetically encoded photoswitches to modulate biological phenomena with high spatiotemporal resolution. We report a set of rationally designed optogenetic photoswitches that use the photolyase homology region of A. thaliana cryptochrome 2 (Cry2PHR) as a building block and exhibit highly…
Among the several transition metals known to mankind, the synthesis of Cu has remained a major challenge owing to their instinctive oxidative power under ambient conditions. Microwave assisted synthesis of copper nanoparticles (CuNPs) using different types of copper-?-diketonates complexesand glycine as reducing agent…