The solubility of aceclofenac in six pure solvents from (293.35 to 338.25) K was experimentally measured using a synthetic method. experimental results indicate obviously that the selected increases with elevated temperature. Furthermore, data were fitted modified Apelblat and Wilson models. show calculated by two models agree RMSD values no more than 2.75 %.

Various mechanical responses of rocks under a complex stress state have attracted the attention engineers. A hollow cylinder torsional apparatus (HCA) was constructed using discrete element method (DEM). series conventional triaxial compression tests different confining pressures and path test with torsion were conducted. The numerical results are consistent laboratory theoretical findings, which indicates that microscopic parameters DEM sandstone specimens correct reasonable. Based on HCA...

This study evaluated the influences of accelerated aging on mechanical properties veneering ceramics used for zirconia frameworks. Five different frameworks were used. Twenty specimens fabricated each ceramic. All divided into two groups. One was subjected to and other as a control. Accelerated performed in distilled water 5 h at 200ºC 2 atm. The density, open porosity, surface roughness, three-point flexural strength, Vickers hardness measured. results showed that roughness all examined...

As a new textile material, silk/PLA mixture combines the outstanding characteristics of silk and PLA fibers, but this is subjected to some problems owing poor alkali resistance fiber during pretreatment reactive dyeing processes. In present work, was tested with three alkalis, namely sodium hydroxide, carbonate bicarbonate. It found that component less influenced by bicarbonate, whereas more or alkalis. Silk/PLA showed low weight loss after bicarbonate treatment, had very high hydroxide...

Dispersion of short carbon fibers in silicon carbide (SiC) matrix directly influences the homogeneity mechanical properties fiber reinforced composites, which is always a aporia fabrication SiC as well concentration for investigators and abroad. this paper, methyl cellulose (MC), carboxymethyl sodium(CMC) hydroxyethyl (HEC) are respectively used dispersant, worked dispersed to unifilar by ultrasonic with addition dispersant. Then Ball milling under predefined formular realize homogeneous mix...

In this work , Csf/SiC composite was hot pressed by adding short carbon fiber and nano black SiC powder into rapid press sintering in order to improve the fracture toughness other mechanical properties .The density, hardness, phase composition, of were studied, toughening principle also discussed. The results indicated that: had a high density above 98% less than 30vol.% . hardness decreased with increase amount Csf fibe. mainly composed 6H-SiC C, temperature graphitization resulted...

Eu/Tb metal-organic frameworks (Eu/Tb-MOFs), exhibiting Eu

ABSTRACT In practice, when an unmanned aerial vehicle (UAV) swarm is not executing a mission, its UAVs will be stored as inventory. To ensure that the UAV can quickly deployed needed, it necessary to assess and predict storage state. Due flexible configuration of swarms complex factors affect them during storage, existing state indicators prediction methods cannot meet requirements storage. order address these issues, availability method based on agent‐based simulation (ABS) proposed....

Surface conditions of carbon fibers severely effect on the bonding strength between and matrix, even mechanical properties composites when were used as reinforcement preparation ceramic matrix composites. treatment was carried out based air oxidation method liquid with concentrated nitric acid (68%) oxidizing solution. It could remove impurities from surface increase degree concavoconvex, so active area increased then improved matrix. The topographies after characterized by SEM. results...

Abstract Crystalline admixture (CA) has been extensively utilized as the commercial product for improving performance associated with strengthening self‐sealing of cracks or decreasing permeability concrete. However, few researches characterizing restrained shrinkage and cracking potential concrete CA at early age. This paper aimed to expand limitation by means experiments including mechanical properties test ring on high‐strength (HSC) from Xypex. The proportion was 0%, 0.5%, 1.0%, 1.5%...

In this paper, a detailed elastic-plastic finite element analysis of the effect compressive loading on crack tip plasticity is studied based material’s kinematic hardening model. Five centre-cracked panel specimens with different lengths are analyzed. The shows that in tension-compression maximum spread reverse plastic zone increases increase stress and near opening displacement decreases at same nominal intensity factor. applied main factor controlling parameters.

In order to find new methods for preparing and improving the performance of optical attenuation slice.Vacuum magnetron sputtering method was used prepare Ni/SiO 2 composite film slices, with vacuum apparatus, at 5,10,15,20,25min time, 0.2,0.4,0.6,0.8,1.0Pasputtering pressure power 300~1200W.The XRD, SEM, EDS, AFM 722 spectrophotometer also were study effects different on structure, surface morphology, composition, three-dimensional roughness light rate slice samples.The results indicated...

SiO 2 optical fiber preform, the parent material in manufacturing fiber, plays an important role properties of fiber. In this paper, dry gel was prepared by Sol-Gel method. According to method, formed hydrolyzing tetraethyl orthosilicate(TEOS) with hydrochloric acid and ammonia water, obtained heat treatment at different temperature. The structure as characterized X-ray Diffraction(XRD), Fourier Transform Infrared Spectroscopy(FT-IR) Scanning electron microscope(SEM). As a result, amorphous...