[PDF] Top 20 Mat. Res. vol.15 número2

... •฀ It is now clear that the relationships of the variation in the powder bed density with average powder bed density for powders may be explained by the differences in the powder pack[r] ... See full document

... The used data as the inputs of fuzzy logic models are arranged in a format of six parameters that cover the percentage of fine fly ash in the ashes mixture, the percentage of coarse fl[r] ... See full document

... after 15 hours of curing in water has been illustrated in Figure ...after 15 hours of curing, Ca(OH) 2 crystals appears in concrete with ZrO 2 nanoparticles while in concrete specimens without ZrO 2 ... See full document

... A sample was cut from the billet, around the deformation zone, with the surface parallel to the longtitudinal plane. The sample was cold mounted in resin, ground with silicon carbide papers (#180, #400, #600 and #1000) ... See full document

... The surface modification by MAO process of Ti-6Al- 4V alloy for biomedical purpose using the parameters employed in this study, did not modify the fatigue behavior of the material, whi[r] ... See full document

... Table 2 presents the average values of effective moisture U (%), and modulus of elasticity E (MPa), for the compression parallel to the grain tests according to the six wood species a[r] ... See full document

... A powder mix corresponding to Fe-0%C, Fe-0.35%C, Fe-0.75%C and Fe-1.1%C was taken in a stainless steel pot with the powder mixed using porcelain balls (10–15 mm diameter) with a ratio of 1:1 by weight. The pot ... See full document

... σ phase is an intermetallic compound of nominal composition Fe-Cr and tetragonal unit cell, which is hard and nonmagnetic. The χ phase, in turn, has an ordered cubic structure, with composition Fe - 25% Cr - Ni 2% - ... See full document

... The preparation of metallographic images followed standard procedures. Samples were embedded in resin and ground in automatic machines with waterproof SiC grinding paper successively with 220, 400, 600, 1000, and 1200 ... See full document

... AISI 409 ferritic stainless steel samples were nitrided using the cathodic cage plasma nitriding technique (CCPN), with the addition of methane to reduce chromium precipitation, increas[r] ... See full document

... Clay minerals can change their naturally hydrophilic character into organophilic, acting as sorbents for organic compounds derived from petroleum such as gasoline, diesel oil, xylene [r] ... See full document

... The concept of using thermal modification of an aluminium alloy in localized areas for providing a larger global deformation of a part and higher energy absorption before failure appe[r] ... See full document

... Wood fibers were derived from manufacture line of a local MDF producer, ranging from approximately 2 to 4 mm long. After the wood fibers were dried, they were screened by 8-mesh screen and then blended with ... See full document

... On the pyroelectric side, the pre-poled sample with 15 MV/m was placed in a temperature-controlled chamber and the thermally stimulated discharge current (TSDC) was measured. The sample was heated at constant rate ... See full document

... The use of powdered iron as starting material promoted conversion to complex hydride at shorter milling times than when granulated iron was used, nonetheless, after 24 hours of millin[r] ... See full document

... 19. Rudy E and Windisch S. Ternary Phase Equilibria in Transition Metal-Boron-Carbon-Silicon Systems, Compendium of Phase Diagram Data, part. I, vol. IX, AFML-TR-65-2. Ohio: Air Force Materials Lab, ... See full document

... Table 2 shows flexural data of all tested materials: castor oil- based polyurethane (PU) resin, phenolic resin, untreated sisal/ PU composite, thermally treated sisal/PU composite, untre[r] ... See full document

... The mussel and oyster shells were heated in an oven at 200 °C for 1 hour to make the shells more brittle and submitted to milling in a high-speed planetary mill with a porcelain jar and alumina balls for 15 ... See full document

... Digital photograph of the Petri dishes containing the cell line Vero (African green monkey kidney cells) and the sample of nanostructured chitosan membrane (a), positive control using l[r] ... See full document

... All the JN1, JJ1 and JK2 steels fractured in a ductile manner in the solution treated condition, see for instance Figure 7a. In contrast, the intergranular facets, Figure 7b, were fou[r] ... See full document