[PDF] Top 20 Mat. Res. vol.15 número1

... in both temperatures. This change seems to have resulted from the loss of some of the smaller grains and some gain in the number of grains larger than 15 µm. In both cases, the annealing has not led to an increase ... See full document

... The amount of setting agent m AlN was also found to affect the coagulation kinetics remarkably. In Figure 9 the evolution of pH versus time during consolidation and the resulting setting time in dependency on m AlN for ... See full document

... The HF-etching process imposed to titanium previously to its anodization led to an increasing dissolution of its outer layer with etching time, so that the sample etched during 180 se[r] ... See full document

... The scaffolds presented no cytotoxicity as evaluated using MC3T3 cells by three different parameters of cell survival and integrity on the same sample: 2,3-bis[2-methyloxy-4-nitro-5-s[r] ... See full document

... For the matrix material the commercial AA 356 alloy supplied by NOVELIS – Poços de Caldas/MG was used in ingots of 25 kg. The ingots were sawn in cubes of approximately 15 × 15 mm and separated in portions ... See full document

... SEM micrographs of fracture surface region of Portland cement mortars containing 10 wt.(%) leather shaving treated in a) acid; b) basic; and c) neutral solutions.. Axial compressive str[r] ... See full document

... Keywords: al alloys, gas atomization, spray forming, two phase flow, liquid break up, surface wave formation.. Introduction.[r] ... See full document

... In order to evaluate the removal of copper using Bofe and Verde-Lodo (VL) bentonite clays as adsorbents thermally modified, the adsorption experiments were conducted using static (bat[r] ... See full document

... Once the constants for every position of the piston of the vibrating rheometer have been determined, the behaviour of the Bingham material specimen in the vibration rheometer can be e[r] ... See full document

... The results revealed that a rotated cube texture, the {001}<110> component, predominated in the as-cast condition and was transformed into brass, copper and S type textures durin[r] ... See full document

... The samples were scanned at a scanning rate of 0.05°/s in the 2θ range of 20° ~ 80°. SEM observation was performed using JEOL JSM-6490LV SEM with a 15-kV accelerating voltage. TEM and HRTEM samples were prepared ... See full document

... The objective of this research was to quantify the influence of the cutting speed, feed per tooth and depth of cut, mainly at high-speed machining, on the microhardness and microstruc[r] ... See full document

... In the first part of the paper, the mechanical behavior of a thick composite tube with a single lamination direction was analyzed using an analytical formulation, which was implemente[r] ... See full document

... The methodology used showed that in all of the composites evaluated, the effect of aging was not significant to contraindicate their applications. The fact that the microhybrid resin with 71% loading of silica and ... See full document

... Figure 8. Micrographs and diffraction patterns from a sample of Ti-46Al-4Nb-2Cr water quenched from 1,350 °C. a) A backscattered scanning electron micrograph image, and b) an EBSD imag[r] ... See full document

... XRD analyses were performed in order to determine the crystalline phases present in the as-quenched glass and heat-treated glass materials. FTIR analyses were also applied to the as-quenched glass and heat-treated glass ... See full document

... A Bohlin VOR rheometer (Bohlin Rheologi, Lund, Sweden) was used for the rheological studies of the suspensions which were dispersed using a ultrasonic probe; Vibra-Cell VCX 600 (Sonic and Materials, Connecticut, USA). ... See full document

... transition from subgrains to grains is in actual fact a transition from low angle boundaries (2 ≤ ξ < 15°) to high angle boundaries (ξ ≥ 15°) a phenomenon which is currently under intense study. For ... See full document

... While the above studies have focused on examining the suitability of crushed stone fine aggregate and dust in improving the mechanical properties of concrete such as compressive stren[r] ... See full document

... The experimental alloys (nominal compositions are listed in Table 1) were produced by a reformed crucible electric resistance furnace (SG 2 -5-10A, China), melted under the mixture of SF 6 /CO 2 protective atmosphere, ... See full document