Materials Literature
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In this paper a study on the corrosion and wear protection of AM60B magnesium alloy, by means of multilayer coating, is described. The coating mainly consists of a porous oxide layer MgO, produced by oxidation in microarc regime, and a single or multilayer top coat of SiOx produced by sol–gel technique and deposited b…
In this work, we have introduced a novel process, referred to as magnetic gelation, to produce porous polymeric monoliths with controlled anisotropic structure. Magnetite polymer composite nanoparticles have been prepared by dispersing hydrophobic magnetite nanocrystals in an organic monomer phase, followed by its min…
In the present study, we used a combination of (17)O NMR methods at a high magnetic field with first-principles calculations in order to characterize the oxygen sites in a series of hydroxylated sodium phosphate compounds, namely the hydrogen pyrophosphate Na(2)H(2)P(2)O(7) and the hydrogen orthophosphates NaH(2)PO(4)…
The development of ultra-precision processes which can achieve excellent surface finish and tolerance at the nanometre level is now a critical requirement for many industrial applications. At present, it is very difficult to observe the diverse microscopic physical phenomena occurring in nanometric machining through e…
A very simple and safe mechanical properties testing procedure to evaluate hydrogen environment embrittlement (HEE) in the environment of high pressure and low temperature hydrogen has been developed. In this method, the high‐pressure hydrogen environment is produced just inside the hole in the specimen. In this work,…
Preface Fundamentals of Biomedical Applications of Laser-Induced Surface Modification of Titanium Alloys Non-Destructive evaluation of material imperfections in a titanium alloy Fretting Wear & Fretting Fatigue Studies of Surface Modified Biomedical Titanium Alloys Titanium-Base Nano-Ultrafine Eutectic & Composites In…
The luminescent properties of -activated with nominal composition were investigated at room temperature and low temperature. There are two types of -emitting centers in the phosphor due to different occupancies in the host . The influence of doping concentration on the preferential site occupancy was studied, and the…
Results are presented concerning the obtaining and properties of ultra high molecular weight polyethylene (UHMWPE) as the material withstanding severe operation conditions, unlike usual polymer modifications. It was demonstrated that modifying UHMWPE via introducing ultra fine particles of inorganic materials promotes…
The purpose of this study is to investigate the effect of the different deposition mediums on the adhesion and removal of particles. Polystyrene latex (PSL) particles ( 50 μ m ) are deposited on thermal oxide and silicon nitride coated silicon wafers using different suspension mediums: air, isopropyl alcohol (IPA), an…
The process of carbothermal reduction of Al2O3 in a nitrogen flow at temperatures of 1450 and 1600?C has been studied. It was established that the powder synthesized at 1450?C is a mixture of Al2O3 and AlN particles and that the powders synthesized at 1600?C are mixtures of AlN, AlON, and Al2O3. Amorphous and crystall…
p-Tolyl glycerol ether not belonging to any of the known gelator families forms stable transparent gels in hydrocarbon media showing very good quantitative characteristics of gelling abilities, which are, in turn, strongly dependent on the chiral characteristics of the gelator. The crystal packing differences between…
Percolative ferroelectric/ferrimagnetic PbTiO3 (PTO)/NiFe2O4 (NFO) composite ceramics are prepared in situ by a sol–gel process. Results show that the NFO particles are well surrounded naturally by only a thin PTO layer, which leads to much higher percolation threshold (0.85) than the universal one (about 0.2) and thu…
The rheological behaviour of the nanocomposites based on chitosan (CS) and unmodified rectorite (REC) were first evaluated. The nanocomposites showed a low shear-rate non-Newtonian viscosity and a rapid shear-thinning behaviour. The zero shear rate viscosity and the storage and loss moduli for the nanocomposites displ…
Novel thiophenophan-1-enes, which are composed of a dithienylethene unit and a chiral bridge, were synthesized and obtained as optically-active single diastereomers. Upon UV irradiation, the open-form isomers afforded single diastereomers of the closed form in 100% diastereo-excess, indicating that this system undergo…
Imogolite is a naturally occurring hydrous aluminosilicate clay mineral. It has nano-tubular structure similar to that of single-walled carbon nanotubes. Imogolite is a subject of interest in the pedological field, but to date there has been no bioapplications of this substance. In this study, we investigated the cell…
The behavior of thin films of diblock copolymers under shear has been studied using coarse-grained Langevin dynamics simulations. The morphologies the film exhibits are examined as functions of composition, segregation strength, and the strength of the shear field. Below the order-disorder transition (ODT) the film ge…
The synthesis and molecular structure of a dimeric aluminium complex composed of tri-lacunary α-Keggin polyoxometalate is described. The polyoxometalate, K(6)Na[(A-PW(9)O(34))(2){W(OH)(OH(2))}{Al(OH)(OH(2))}{Al(μ-OH)(OH(2))(2)}(2)]·19H(2)O (KNa-1), afforded by the reaction in water of a tri-lacunary Keggin polyoxotung…
We report a two-step chemical vapor deposition (CVD) method for fabrication of hierarchical polymer-coated carbon nanotube (CNT) microstructures having tunable mechanical properties and accessible chemical functionality. Diverse geometries of vertically aligned CNTs were grown from lithographically patterned catalyst…
Metallic materials suffering deformation store elastic strain. Evaluation of this strain energy is important for understanding the mechanical and physical properties of the materials. Although direct evaluation of the stored energy is difficult, it can be evaluated by determining the defect energy of dislocations indu…
Four homes are under construction in the Tennessee Valley to showcase homes that are at least 50% energy savers as compared to homes built to local code. Schaad Companies LLC, the Tennessee Valley Authority (TVA), the Oak Ridge National Laboratory (ORNL), Barber McMurry Architects (BMA) and the Department of Energy (D…