[PDF] Top 20 Mat. Res. vol.15 número6

... (H V ) was evaluated by a Vickers indenter applying a load of 30 N during 15 seconds. Mechanical strength of the specimens (average of samples per value) was measured at ambient temperature by a universal testing ... See full document

... The composites manufactured with low level of banana fibres (30%vol) showed a better agreement with the rule of mixture model, while the composites with high level of fibres (50%vol) were better described ... See full document

... with 15 minutes at 540 °C, there was a rapid Al-diffusion inside U-10Mo structure, sufficient to reach steadily 8 at% Al until 170 µm from interdiffusion ... See full document

... According to the T 1 H values shown in Table 3, the hybrid materials prepared with Aerosil ® R972 (organo modified) presented good component dispersion and compatibility, since the T [r] ... See full document

... The scaffold (commercial HA/TCP) morphology calcined at 725 °C is shown in Figure 7a, Figure 7b shows the detail of ceramic scaffold fracture, where it is possible to see the HA coati[r] ... See full document

... Keywords: aluminum alloys, cold expansion, compressive residual stress, hardening, block loading, fatigue damage, fatigue life enhancement.. Introduction.[r] ... See full document

... Figure 3 shows TEM image of zirconia nanoparticles synthesized by sol-gel method using ZrOCl 2 .8H 2 O, The estimated diameters of nanoparticles were found to be 25 nm.. It could be s[r] ... See full document

... CFRP composites displayed transverse crack propagation and the fracture surface showed three distinct regions, viz., crack origin, propagation and final failure1. Significant variations[r] ... See full document

... Due to these characteristics of the molybdates, our group has studied the preparation and characterization of many anisotropic molybdenum oxides. In particular, this paper deals with the KMo 4 O 6 phase which is reported ... See full document

... High-energy ball-milling of ZnO (M/s Merck, 99% purity) and α-Fe 2 O 3 (M/s Glaxo, 99% purity) mixture in 1:1 mol% was conducted in a planetary ball mill (Model P5, M/S Fritsch, GmbH, Germany). The time of milling was ... See full document

... The binders used in preparing paste, mortar and concrete mixtures in this study were Portland slag cement CEM III/A (Class 32.5N) and copper tailings obtained at various depths from deposits at an abandoned processing ... See full document

... In this context, the objective of this article is to verify the influence of composition variability of recycled aggregate of CDW in the performance of concretes, evaluated through it[r] ... See full document

... Fifty bovine mandible incisor teeth were selected. The teeth were cleaned thoroughly with pumice slurry and stored for one week in deionized water at room temperature. Standardized Class V cavities were prepared in all ... See full document

... At low concentration of MWNTs, from Figures 2a-c, it can be seen that the bright dots (i.e., MWNTs) embedded in the LLDPE matrix and the caves (i.e., MWNTs) pulled out from the LLDPE [r] ... See full document

... In this study, the effects of reinforcement volume ratios (RVR) on composite structure and thermal conductivity were examined in Al-MgO reinforced metal matrix composites (MMCs) of 5%, 10% and 15% RVR produced by ... See full document

... Doped lanthanum chromite-based ceramics are the most widely used interconnector material in solid fuel cells (SOFC) since they exhibit significant electrical and thermal conductivity, s[r] ... See full document

... A mechanical spectroscopy study of Cu-Zr-Al bulk metallic glasses, was performed with two types of equipment: a Kê-type inverted torsion pendulum and an acoustic elastometer, working in[r] ... See full document

... is significant that the MOSMET reactor permits not only to deposit metal vapor or molecules (such as TiN 2 ) on the surface through the arc discharge or the ion implantation through t[r] ... See full document

... With increasing milling energy at BPR 10:1, a partially reaction was performed between the starting materials. However, the strong Mo peak can still be seen in the pattern of this sample. Higher milling energy in BPR ... See full document

... However, the first-order Raman spectra of V-doped sample was shifted to lower frequency, revealing that there existed low free carrier concentration, which might be induced by the deep[r] ... See full document