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Our research aims to investigate the fabrication of additively manufactured (AMed) Ti-6Al-4V samples under reduced power with the addition of TiC heterogeneous nucleation site particles. For this aim, Ti-6Al-4V samples are fabricated with and without TiC heterogeneous nucleation site particles using an EOS M 290 machine under optimal parameters and reduced power conditions. The microstructure and tensile behavior of the produced samples were studied. In addition, a single-track test was performed to obtain a good understanding of the suppression of gas pores and balling formation with the addition of TiC heterogeneous nucleation site particles. It was found that the formation of gas pores and balling was suppressed with the addition of heterogeneous nucleation site particles within the metallic powder.
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http://dx.doi.org/10.3390/ma16175974 | DOI Listing |
J Colloid Interface Sci
September 2025
State Key Laboratory of Hydro Science and Engineering, and Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China. Electronic address:
Hypothesis: On highly cleaned planar surfaces submerged in highly cleaned water, flat surface nanobubbles with an angle of attachment of ∼15 are observed - never on engineering surfaces submerged in plain water, though here unidentified cavitation nuclei are always present and cause low tensile strength.
Experiments: In the present study, surface nanobubbles are generated by standard experimental techniques on a polished steel surface, and we find that the shape and the angles of attachment of the bubbles are influenced by the local substrate topography. These observations align with the theory of non-adsorbed liquid zones, which explains a surface nanobubble as a bubble with a skin of contamination molecules, which bond along the bubble rim at a contact angle of ∼14.
Langmuir
September 2025
Osaka Research Institute of Industrial Science and Technology, 1-6-50, Morinomiya, Joto-ku, Osaka 536-8553, Japan.
The binary composites of liquid () and crystalline () difluoroboron β-diketonate (BFdbk) complexes exhibited a metastable nature arising from the intricate interplay between their liquid and crystalline components in bulk. Differential scanning calorimetry (DSC) measurements indicate nearly complete miscibility of and when the fractional volume of occupied a substantial portion, corresponding to below 47 mol % of the content. In contrast, polarized optical microscopic (POM) observations unveiled that the / composites between two glass slides crystallized regardless of the content.
View Article and Find Full Text PDFCarbohydr Polym
November 2025
School of Chemistry and Chemical Engineering, State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003, China. Electronic address:
This study introduces a novel bio-based flame retardant, MCC-GMA-PA-MEL, synthesized from microcrystalline cellulose (MCC) modified with phytic acid (PA) and melamine (MEL). Characterization of the resulting composites revealed a significant enhancement in PLA crystallinity to 35.9 %, driven by improved molecular mobility and heterogeneous nucleation effects.
View Article and Find Full Text PDFBiomacromolecules
September 2025
Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan.
Biobased polyesters, recyclable sustainable polymers derived from renewable feedstock, are promising alternatives to petroleum-based polymers. The crystallization behavior, crystal structure, and supramolecular structures of a series of biobased long-chain aliphatic polyesters, consisting of a diester of 10-undecenoic acid with isosorbide (IS), isomannide (IM), and butanediol (BD) as the midsegments, were studied by various scattering methods and Raman spectroscopy. Polyesters containing butanediol-type midsegments (CBD) participated in the crystallization by being incorporated into the orthorhombic polyethylene crystal lamellae.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Heterogeneous ice nucleation, triggered by surfaces, profoundly impacts climate systems, biological processes, and technological applications. Classical nucleation theory (CNT) predicts that with curvature radii decreasing within 1 order of magnitude of the critical nucleus radius, convex surfaces should suppress nucleation and concave surfaces should promote nucleation; however, such regularity has not been observed explicitly in experiments, and there are even conflicting results. Here, we resolve this long-standing controversy by providing the first experimental evidence about the bidirectional regulation of ice nucleation from both liquid and vapor phases through precisely engineered convex (nanosphere) and concave (nanopore) surfaces.
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