Materials Literature
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Foreign object damage in gas turbines presents serious safety and financial concerns. As the aerospace industry draws closer to implementing ceramic matrix composites (CMCs) in gas turbines, the corresponding behavior in these materials after such events needs to be understood. To address this requirement, several sil…
This paper investigates the macroscopic behaviour of an axially loaded discrete granular system from a stability perspective. The granular system comprises uniform grains that are elastically connected with some bending and shear interactions and confined by some elastic supports. This structural system can then be cl…
Abstract In the present work a parametric investigation on hydrogen evolution by hydrolysis of ball‐milled Al/graphite composite materials with water is reported. The results showed that the addition of NaCl produced some favorable effects on the completeness of the Al hydrolysis reaction with water, particularly at l…
Reactive sputtering by high power impulse magnetron sputtering (HiPIMS) and direct current magnetron sputtering (DCMS) of a Zr target in Ar/H2 plasmas was employed to deposit Zr-H films on Si(100) substrates, and with H content up to 61 at. % and O contents typically below 0.2 at. % as determined by elastic recoil det…
Despite promising advantages, the use of carbon nanotubes (CNTs) for biomedical applications is limited due to their low biocompatibility. This study presents the modification of CNTs by plasma polymerization using two different monomers, pentafluorophenyl methacrylate (PFM) and allylamine (AA). We demonstrated that b…
The solid-state MU8Q17 compounds ScU8S17, CoU8S17, NiU8S17, TiU8Se17, VU8Se17, CrU8Se17, CoU8Se17, and NiU8Se17 were synthesized from the reactions of the elements at 1173 or 1123 K. These isostructural compounds crystallize in space group C2h3 - C2/m of the monoclinic system in the CrU8S17 structure type. X-ray absor…
Considering the difference of energy bands in graphene and silicene, we put forward a new model of the graphene-silicene-graphene (GSG) heterojunction. In the GSG, we study the valley polarization properties in a zigzag nanoribbon in the presence of an external electric field. We find the energy range associated with…
This study examines the interfacial debonding behavior of self-healing fiber-reinforced polymers and the performance of repair of interfacial debonding. Self-healing is accomplished by incorporating a microencapsulated healing agent and a catalyst within a coating layer on the surface of the fiber strand. Single edge-…
We report the influence of photoisomerization on the splay (K11) and bend (K33) elastic constants in a bent-core nematic doped with a small amount of a calamitic photoactive compound. Trans-cis isomerization of the latter compound results in a large decrease (factor of ∼3 for K33) of both the moduli, and K33 becoming…
Many experiments have revealed that the surfaces of graphene and graphene‐like structures can play an active role as a host surface for clusterization of transition metal atoms. Motivated by these observations, we investigate theoretically the adsorption, diffusion and magnetic properties of Pt clusters on three diffe…
Zinc titanate (ZnTiO3) thin films grown by atomic layer deposition with ilmenite structure have recently been identified as an excellent solid lubricant, where low interfacial shear and friction are achieved due to intrafilm shear velocity accommodation in sliding contacts. In this Letter, high resolution transmission…
To enable graphene oxide (GO) flakes for application based on solution processable technology, we show that they can be self-assembled from solution on flexible substrate driven by a Coulomb interaction with the self-assembled monolayer (SAM). Field-effect transistors exhibit a high hole mobility around 14 cm2/V·s aft…
Important requirements for exogenous dyes or contrast agents in magnetic resonance imaging (MRI) include an effective concentration of paramagnetic or superparamagnetic ions at the target to be imaged. We report the concise synthesis and characterization of several new enantiopure bifunctional derivatives of (α(1)R,α(…
Using La0.67Ca0.33MnO3 (LCMO) and CaRuO3 (CRO) as components, the single-layer films, bilayers, trilayers, and superlattices were fabricated on NdGaO3 (110) substrates. These epitaxial structures show quite different Curie temperature (TC) depending on the LCMO layer thickness (x), especially in the low x region. For…
To explore the transport properties of polycrystalline graphene under large tensile strain, a strain device has been fabricated using piezocrystal to load local strain onto graphene, up to 22.5%. Ionic liquid gate whose capability of tuning carrier density being much higher than that of a solid gate is used to survey…
ABSTRACT Polymer dispersions containing crystalline nanocellulose have been used as birefringent inks. When printed onto dark paper, the letters are darker than the background if viewed without polarizers, while they are brighter than the background if viewed with crossed polarizers. This type of contrast inversion ca…
The local structure of tetragonal BiFeO3-PbTiO3 solid solutions featuring anomalous lattice distortions has been determined using simultaneous fitting of neutron total scattering and extended X-ray absorption fine structure data. On the local scale, the large tetragonal distortion, promoted by the displacements of the…
The non-equilibrium self-consistent generalized Langevin equation theory of irreversible processes in glass-forming liquids [P. Ramírez-González and M. Medina-Noyola, Phys. Rev. E 82, 061503 (2010)] is extended here to multi-component systems. The resulting theory describes the statistical properties of the instantane…
The surface treatment of spherical silica particles with silane coupling agents having various organic functional groups was conducted and the effect of the alkoxy group number on the molecular flexibility of the silane chain with multilayer coverage was investigated using 1H-pulse nuclear magnetic resonance spectrosc…
In this work the hot-dip galvanizing coating ZnAl2Mg2 was tested against the reference material ZnAl0.2 in various standardized cyclic corrosion tests with alternating climates. Those tests were the VDA 621-415 test and the VDA 233-102 test, two tests with alternating humidity and temperatures as well as salt spray ph…