Materials Literature
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Purpose: The goal of the paper is the presentation of computer assisted method for analysis of the metallographic images obtained in the scanning electron microscope (SEM) from the low alloyed steel 13CrMo4-5 elements in different states of internal damages after long time creep service. Design/methodology/approach: I…
Fabrication of functional tissue constructs using sandwiched layers of cultured cells could prove to be an attractive approach to tissue engineering. Rapid detachment of cultured cell sheets is a very important recovery method that permits facile manipulation of the sheet and prevents functional damage. To induce hydr…
Divalent europium-activated p-sialon (Si 6-z Al z O z N 8-z , 0.1 ≤ S≤ S 2.0) phosphors with dopant concentration varying in the range of 0.02-1.5 mol % were synthesized by firing the powder mixture of α-Si 3 N 4 , AIN, Al 2 O 3 , and Eu 2 O 3 at 2000°C for 2 h under a nitrogen-gas pressure of 1.0 MPa. The phase purit…
New techniques using Moissanite and diamond anvil cells have allowed us to measure the ac susceptibility and dc magnetization of different strongly correlated systems at high hydrostatic pressures. We present here a new type of anvil cell designed to go inside a SQUID magnetometer, specifically the MPMS system of Quan…
Simple chelating agents have been synthesized using a porphyrin and a covalently linked crown-ether. Depending on the relative spatial arrangement of both motifs, the resulting ligands, either a macrotricycle or bis-macrocycles, differ one from another by their flexibility or their aptitude to chelate bivalent or triv…
The change of the alkyl chain length in N,N-bis(coordinating group)-substituted oxamides was observed to be able to tune the structures of two new radical complexes[Cu2(oxen)(4-NITPhPy)2](ClO4)2 (1) [oxen = N,N-bis(2-aminoethyl)oxamide] and [Cu2(oxpn)(4-NITPhPy)2](ClO4)2·H2O (2) [oxpn = N,N-bis(2-aminopropyl)oxamide],…
In this article we discuss the synthesis of nanoparticles and the preparation of dense nanoceramics of Y-doped . We prepared the nanoparticles by combustion synthesis and characterized the nanopowders by X-ray diffraction, scanning electron microscopy (SEM), and transmission electron microscopy. The good sintering pro…
, a native defect luminescent material with blue emission, was fabricated by annealing powders under various partial pressures or in Ga metal atmosphere. Annealing under low partial pressure favors the photoluminescence (PL), which indicates that should be one of the luminescence centers in this phosphor. Annealing in…
Mass loss and thermometric methods have been used to study the corrosion inhibitory effect of synthesised Schiff′s bases viz . N ‐(furfurilidine) – 4‐ methoxy aniline (SB 1 ), N ‐(furfurilidine) – 4‐ methylaniline (SB 2 ), N ‐(salicylidine) – 4‐ methoxy aniline (SB 3 ), N ‐(cinnamalidine) – 4 –methoxy aniline (SB 4 )…
The work in this paper addresses the need to evaluate the impact of emerging interconnect technologies, such as carbon nanotubes (CNTs), in the context of system applications. The critical properties of CNTs are described in terms of equivalent material parameters such that a general methodology of
The combination of two metallaporphyrin based tectons bearing four pyridyl-N-oxide groups with HgBr2 or PbI2 complexes leads to the formation of 3-D heterobimetallic coordination networks which were characterised in the crystalline phase by X-ray diffraction on single crystals. Both lone pairs of the oxygen atom of th…
AbstrAct Purpose: Poor corrosion resistance is one of the main causes to prevent magnesium alloys for wide applications. The addition of rare earth elements (RE) is an effective way to improve corrosion resistance of magnesium alloys. Heat treatment condition can also influence the corrosion behavior of magnesium allo…
The article gives basic information on the chief constituents of Mg-Li alloys and on their expected properties. A schematic representation and technical performance of a pilot stand for melting and pouring of reactive ultralight magnesium-based alloys have been presented. The preliminary data regarding the manufacture…
We report the HgCl2-mediated interfacial self-assembly of coordination polymer nanocombs composed of (zinc, palladium) tetrapyridylporphyrin and 4,4′-bipyridyl ligands. Scanning electron microscopic images revealed that lengths and widths of the core stems of the nanocombs were about 10 and 1 μm, respectively. Needle-…
Two mechanisms by which an inorganic thin film may reversibly adapt to externally imposed strain have been considered: (1) the chemical strain effect and (2) self-organization of polycrystalline macro-domains. The chemical strain effect is due to the transformation of the elastic energy of an externally applied stress…
A columnar mesoporous structure was obtained in single-crystalline n-type 6 H SiC by photoelectrochemical etching. The 20 nm diameter cylindrical pores were about 200 μ m long, parallel, and distributed in a self-ordered manner. The pore morphologies and etching curves under different experimental conditions for both…
Thin films composed of SiO(2) nanorods or nanoporous SiO(2) (np- SiO(2)) are attractive for use as a low refractive index material in various types of optical coatings. However, the material properties of these films are unstable because of the high porosity of the films. This is particularly apparent in dry versus hu…
Original and effective syntheses of crystalline silver wires and saw bundles, using reduced Keggin polyoxomolybdovanadate (POM) as mediator and reducing agent, were performed in acetonitrile at room temperature; several parameters influencing the final silver 1D-structures, with micrometric length and nanometric thick…
We find that the gas phases of air bubbles covered with anionic or cationic polystyrene latex particles dissolve on exposure to cationic and catanionic surfactants. The particles on the bubble interface are released as singlets or aggregates when the surfactant has a single hydrophobic chain, while porous colloidal ca…
Ternary clusters Cu(9)In(10)S(9)(SEt)(21)(PPh(3))(3) and Cu(11)In(6)S(7)(S(t)Bu)(15) were isolated from the UV-photolysis products of precursors (PPh(3))(2)CuIn(SEt)(4) and (PPh(3))(2)CuIn(S(t)Bu)(4), respectively, and structurally characterized.