Materials Literature
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Tests on the fatigue crack growth rate were conducted on four pipeline steels, two of grade API 5L-X52 and two API 5L-X70. One X52 material was manufactured in the mid-1960s and the other was manufactured in 2011. The two X70 materials had a similar vintage and chemistry, but the microstructure differs. The fatigue te…
Two dimensional C/C–ZrB2–ZrC–SiC composites were fabricated through precursor infiltration and pyrolysis process using a mixture of polycarbosilane and ZrB2 precursor and ZrC precursor as the impregnant. The microstructures, mechanical properties and ablation properties of the composites were investigated. The results…
Magnetische Co-Produktion: Der Komplex [Co(μ-L)(μ-OAc)Y(NO3)2] (siehe Struktur; O rot, N blau, C grau), dessen CoII-Ion gemäß magnetischen Messungen und inelastischer Neutronenstreuung einen D-Wert von etwa 45 cm−1 aufweist, zeigt eine langsame magnetische Relaxation und das Verhalten eines Einzelionmagneten.
We show how an embedded many-body expansion (EMBE) can be used to calculate accurate \emph{ab initio} energies of water clusters and ice structures using wavefunction-based methods. We use the EMBE described recently by Bygrave \emph{et al.} (J. Chem. Phys. \textbf{137}, 164102 (2012)), in which the terms in the expan…
Magnetic, magnetocaloric and exchange bias properties have been systematically investigated in Ni46Co4Mn38Sb12 ribbon by applying magnetic field along (IP) and perpendicular (OP) to the ribbon plane. From the thermo-magnetization curves, the sharpness of the martensitic transition is observed to be nearly the same for…
We exploit a prescription to observe directly the physical properties of the thermodynamic limit under continuously applied field in one-dimensional quantum finite lattice systems. By systematically scaling down the energy of the Hamiltonian of the open system from center toward both ends, one could adopt the edge sit…
The structural, magnetic, magnetocaloric and magnetotransport properties of Ni46Co4Mn38Sb12 melt spun ribbons have been systematically investigated. The partially ordered B2 phase of the as-spun ribbon transforms to fully ordered L21 phase upon annealing, which signifies a considerable change of the atomic ordering in…
The next super model: The Au84+ core of [Au20(SR)16] can be viewed as two non-conjugate 4 center–2 electron (4c–2e) tetrahedral Au4 superatoms. The four valence electrons are delocalized in each Au4 unit as 4c–2e σ bonds. Chemical bonding analysis confirms that a 2e-superatom network exists in [Au20(SR)16] (see pictur…
In thin film ferroelectric capacitor the chemical and electronic structure of the electrode/FE interface can play a crucial role in determining the kinetics of polarization switching. We investigate the electronic structure of a Pt/BaTiO3/SrTiO3:Nb capacitor using time-resolved photoemission spectroscopy. The chemical…
The TiO 2 @PANI core/shell nanorod array is prepared by the combination of hydrothermal and electro-polymerization methods. A significant optical modulation (57.6% at 700 nm), high coloration efficiency (37.1 cm 2 C –1 ), and good cycling performance (62.1% after 1000 cycles) are achieved for the TiO 2 @PANI core/shel…
Brust-Schiffrin synthesis (BSS) of metal nanoparticles has emerged as a major breakthrough in the field for its ability to produce highly stable thiol functionalized nanoparticles. In this work, we use a detailed population balance model to conclude that particle formation in BSS is controlled by a new synthesis route…
A magnetic Co-production: The complex [Co(μ-L)(μ-OAc)Y(NO3)2] (see structure O red, N blue, C gray), in which the CoII ion exhibits a D value of approximately +45 cm−1, as determined by magnetic and inelastic neutron scattering experiments, exhibits slow magnetic relaxation and single-ion magnet behavior.
Polyetherurethane (PEU) is in use for blood-contacted devices because of its excellent mechanical properties. However, poor hemocompatibility of the hydrophobic material required surface modification or endothelialization. To increase the biocompatibility of PEU, the polymer was coated with a titaniumcarboxonitride [T…
ABSTRACT The acetaldehyde (AA) scavenging mechanisms of anthranilamide, metaxylenediamine (MXDA), and alpha‐cyclodextrin were investigated through a combination of proton nuclear magnetic resonance ( 1 H‐NMR) and mass spectrometry techniques. AA was found to react with the amide and amine groups of anthranilamide to p…
Poly(2-hydroxyethyl methacrylate) (pHEMA) is a widely utilized biomaterial due to lack of toxicity and suitable mechanical properties; conformal thin pHEMA films produced via chemical vapor deposition (CVD) would thus have broad biomedical applications. Thin films of pHEMA were deposited using photoinitiated CVD (piCV…
Coronary stents must not provoke an inflammatory response; however, some kinds of ions that are released from biometals induce biological reaction. In the present study, we quantitatively evaluated biological reaction of nickel-free high-nitrogen stainless steel (HNS) by endothelial cell culture, and a bioimaging syst…
In this work, the effect of processing and subsequent thermal treatment on the rheological behavior and microstructure aggregation of two different types of thermoplastic polyurethanes (TPUs) are investigated. Elastomeric TPUs, which are segmented block copolymers composed of alternating soft and hard segments, and am…
Poly( l ‐lactic acid) (PLLA), a biopolymer that can be derived from renewable resources, is known for its brittleness as a result of slow crystallization rates under supercooling conditions, which is associated with the formation of large spherulites. In addition, the glass transition temperature ( T g ) of PLLA is 60…
Adjusting the mechanical properties of polyester-based vascular grafts is crucial to achieving long-term success in vivo. Although previous studies using a fabric-based approach have achieved some success, a central issue with pure poly(lactic acid) (PLA) or poly(glycolic acid) (PGA) grafts sealed with poly(DL-caprola…
We have screened 18 Phoma spp. for the mycosynthesis of silver nanoparticles (AgNPs). Out of 18, 17 Phoma spp. demonstrated mycosynthesis of AgNPs, which were characterized by UV-vis spectrophotometry, Fourier transform infrared, X-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy (…