Materials Literature
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The non-linear stability analysis of composite cylindrical panel subjected to concentrated in-plane mechanical and localized thermal loadings are reported here. The buckling of composite panel subjected to concentrated in-plane mechanical loading/ localized thermal loading is solved in two steps as the prebuckling str…
Abstract In the wake of an increasing number of flights in sandy conditions, the solid particle erosion of aircraft turbine components has become a critical issue. Since the Second World War, this type of wear has been investigated aiming at identifying measures to improve the life time and performance of aircraft tur…
作为第三代主体化合物,杯芳烃及其衍生物具有重要的研究价值和应用前景。本工作分别合成了对叔丁基杯[4]芳烃单羧酸、二羧酸和四羧酸3种衍生物（CMA、CDA和CTA）。与预期一致,这种本体疏水、上缘携带疏水结构、下缘携带亲水基团的杯[4]芳烃衍生物虽然具有典型的两亲性化合物结构特征,但却与一般表面活性剂不同,很难溶于水。胶凝实验发现,CDA和CTA分别可以胶凝17种有机溶剂和10种可聚合单体中的1种和7种,CMA和未修饰的对比物C4不含羧酸结构单元,不能胶凝其中任何一种。其中,CTA的可聚合单体凝胶不但具有良好的热可逆性,而且在水存在下,可以形成稳定的凝胶乳液。以此凝胶乳液为模板,通过聚合得到了具有不同微观结构的多孔块材。初步的吸附实…
Fibers of primary cell walls of Ci bamboo (Neosinocalamus affinis) were analyzed with an atomic force microscope (AFM) to determine the arrangement of microfibril aggregates and the effect of pretreatments (ultrasonic treatment and different drying methods) on the arrangement and diameter of microfibril aggregates and…
We report, for the first time, the intercalation of poly[oligo(ethylene glycol) oxalate] (POEGO) and POEGO lithium salt (LiCF3SO3) complex (POEGO-LiCF3SO3) into vanadium pentoxide xerogel (V2O5nH2O). The effect of changing the polymer concentration on the interlayer expansion of the layered host was studied, and the o…
We demonstrate a protocol for single-walled carbon nanotube functionalization using thermo-sensitive PEO-PPO-PEO triblock copolymers in an aqueous solution. In a carbon nanotube/PEO105-PPO70-PEO105 (poloxamer 407) aqueous solution, the amphiphilic poloxamer 407 adsorbs onto the carbon nanotube surfaces and self-assemb…
Biomass is an important renewable energy resource, which is used to replace the petroleum to produce chemicals. Glucose is a monomer of cellulose, which is the main component of biomass. In this work, conversions of glucose to value-added chemical by a simple method have been reported. TiO2 photocatalysts were fabrica…
Abstract Beim Lichtbogenbolzenschweißen wird ein stiftförmiges Verbindungselement mit oder ohne Gewinde mittels eines Lichtbogens mit einem Bauteil verbunden. Verwendet werden in der Regel Verbindungsmittel wie Stifte, Buchsen und Bolzen mit Gewinde. Während des Schweißprozesses wird ein Lichtbogen an der Stirnfläche…
A Monte Carlo simulation method with an instantaneous density dependent mean-free-path of the ablated particles and the Ar gas is developed for investigating the transport dynamics of the laser-ablated particles in a low pressure inert gas. The ablated-particle density and velocity distributions are analyzed. The forc…
We have studied the Zitterbewegung effect on an infinite two-dimensional sheet with honeycomb lattice. By tuning the perpendicular electric field and the magnetization of the sheet, it can enter different topological phases. We have shown that the phase and magnitude of Zitterbewegung effect, i.e., the jittering motio…
This paper portrays an approach of an analysis that provides information regarding the presence of harmonics at the inverter output terminal. It is certainly true that harmonics cause unbalance and excessive neutral currents, interference in nearby communication networks and disturbance to other consumers. More import…
In this research, TiO2 nanotubes were synthesized by anodized oxidation method and were covered with a hydroxyapatite-silver nanoparticles using photodeposition and dip coating for loading silver nanoparticles and coated hydroxyapatite (HA). The morphological texture of TiO2 nanotube and Ag-HA nanoparticles on TiO2 na…
We study the influence of boundaries on chiral effects in hot dense relativistic spinor matter in a strong magnetic field which is transverse to bounding planes. The most general set of boundary conditions ensuring the confinement of matter within the bounding planes is considered. We find that, in thermal equilibrium…
Titanium dioxide thin films were deposited on silicon (111) and glass substrates by using direct current (dc) magnetron sputtering system. Thin films were deposited with different O2 gas flow rate (1, 3, 9, 12 sccm) while keeping Ar gas flow rate constant at 30 sccm. The samples exhibit amorphous phase as deposited an…
A new approach to prepare polymeric hydrogels was \ndeveloped to obtain an efficient controlled release system \nfor dental treatments. Hydrogels were prepared by a \nmethod of condensation through amidation, using a \nnatural (chitosan) and a synthetic polymer - poly(maleic \nanhydride-alt-vinyl acetate). The influen…
Silicone elastomers with elongations approaching 5000% are now available. These elongations are nearly 4 times greater than any commercial elastomer. The new elastomers utilize a cure mechanism which generates elastomeric properties by driving linear polymers to extremely high molecular weights with concomitant format…
Cet article décrit les principaux paramètres impliqués dans la corrosion atmosphérique des métaux et alliages : les facteurs climatiques et leur variabilité - taux d’humidité, température, cycles humidité / séchage -, mais aussi la présence de particules solides ou de polluants. Les méthodes de suivi de la corrosion a…
Abstract This chapter elucidates the indispensable role of characterization in the development of cold-sprayed coatings and illustrates some of the common processes used during coatings development. Emphasis is placed on the advanced microstructural characterization techniques that are used in high-pressure cold spray…
Abstract The in-service cutting edge of a mining loader bucket was investigated and its wear behavior compared with samples tested in the laboratory to assess how well the wear testing methods correlate with the in-service conditions. The examined in-service cutting edge of a bucket made of a wear resistant steel had…
The aim of the measurement was the observation (examination) and evaluation of the vibration impact on the technological head in the technology of abrasive water jet when changing the selected technological parameters, namely the feed rate of the technological head. The experiments were carried out on one kind of mate…