[PDF] Top 20 Mat. Res. vol.10 número2

... We gratefully aknowledge CNPq and CAPES for covering the editorial and printing costs of this issue of Mat. Res. The financial support from Departamento de Engenharia de Materiais, Universidade Federal de ... See full document

... Tables 3 and 4 show the values of the measured parameters grouped by class of dentin. It can be seen that all parameters but the tilt angle vary depending on the class analyzed. The standard devia- tions are still large, ... See full document

... The aim of this work is to evaluate the applicability of the Wheeler and Willenborg models to predicting fatigue crack growth retardation in a flash welded structural steel subjected to[r] ... See full document

... In order to verify the possibility of using the studied materials as adsorbents in naphthenic acids removal process, adsorption kinetics were plotted for both clay and activated alumin[r] ... See full document

... In the case of a vibratory mill like SPEX, it is possible to produce small quantities of mechanically alloyed powder in relatively short times. In this system, the ball and powder charges are placed in a small jar which ... See full document

... HDPE parts with pore gradients were prepared by selective laser sintering demonstrating that this technique can be used to easily control the structure and the properties of the parts m[r] ... See full document

... In this work, samples of AA7050 aluminium alloy with and without titanium addition that were produced by mechanical alloy- ing and hot extrusion were submitted to solution heat [r] ... See full document

... The purpose of this paper is to characterize the differences from Bayer gibbsite crystals which are observed in the specific surface area, internal structure and morphology of the micr[r] ... See full document

... A great number of materials are used today to replace damaged bones and tissues, including metallic materials due to their excellent mechanical properties, such as strength and hardness. Unfortunately, these materials ... See full document

... PtRu/Carbon materials were prepared by hydrothermal carboniza- tion process using glucose or starch acts as the carbon sources and reducing agents, and platinum and ruthenium salts as c[r] ... See full document

... DSC studies revealed that PNIPAAm exerts a thermal stabilizing effect on uncross-linked CLG, while the cross-linking with glutaraldehyde affects only the biological polymer, preventing [r] ... See full document

... The lead concentrations in the material under study were high, but the product’s packaging contained no information about these concentrations.. Keywords: Permlastic ® , impression mat[r] ... See full document

... of PPy films electrodeposited from oxalic and citric acid media have been attributed, respectively, to the bipolaronic species and to carbonyl groups that are formed by overox[r] ... See full document

... Thermogravimetric analysis (TGA) of the gels and green bodies were performed on a thermoanalyzer (TA Instruments 2950) equipped with an alumina tube furnace and alumina crucibles. Typically, tests were performed in ... See full document

... Association between polymers and inorganic species has been employed in many systems and in a variety of dimensional scales in order to produce high-performance composites. The association between stiff and strong ... See full document

... The uncured PU and Araldite composites were inserted in a hand press and extruded as rods with 3 mm diameter and cut in 1.5 cm long pieces. In order to establish electric contact, a 10 cm copper wire was attached ... See full document

... at 35% (conc.) and phosphoric acid (conc. > 85%) in 4:1 proportion respectively (Sol. A), forming a white viscous paste, named as F-HA paste (F-HA). The complete experimental procedure is illustrated on the flowchart ... See full document

... at 10 MPa in a 15 mm diameter cylindrical die and then CIPed at 150 MPa in order to form disk-shaped green specimens with a thickness of 5 ...were 10 and 30 °C/minutes, ... See full document

... Figures 3-5 show the plots of volume fraction as a function of time; interface area per unit of volume against volume fraction, the microstructural path, and the contiguity as a functi[r] ... See full document

... and 98.4 Å for BET surface area, total pore volume and average pore size, respectively. The larger surface area of the TiO 2 material presented here was probably due to incomplete condensation of Ti – OH groups and low ... See full document