[PDF] Top 20 Mat. Res. vol.15 número3

... of the sample RMFS80 was 55% higher than RP19b and 67% above of RMMC70. The result was more significant for the modulus of elasticity, exceeding the value of RP19b in 89%. Considering the abrasion resistance of the ... See full document

... This work aims to study changes in chemical composition and thermal stability of ramie fibers by washing them with distilled water. An additional goal is to study the incorporation of glass fiber and washed ramie fiber ... See full document

... In this sense, results on morphology, composition and crystal structure have indicated that it is possible to produce nanoparticles of CuZnAl shape memory alloys with martensitic struc[r] ... See full document

... Samples with the highest impact strength were PA 60% GF, PA 6, PA 6/6 30% GF and in fourth place PA 6 15% and 30%GF, according to Figure 8. The heat treatment has become an evidence for impact resistance ... See full document

... In this study, bentonite clay was modified by cation exchange capacity (CEC) reaction with a quaternary ammonium salt at 100% of CEC of the clay. The organoclay was mixed with compati[r] ... See full document

... Keywords: ceramics, electron magnetic resonance, strontium titanate, chromium, niobium.. Introduction.[r] ... See full document

... The secondary stabilizer Irgafos 126 act as a chain extender to the polymer when incorporated to post industrial PET wastes by extrusion molding, similarly to the traditional chain ex[r] ... See full document

... Table 1 shows the influence of laser power at wavelengths of 488 nm and 541 nm on TSDC peak current, and the area under the TSDC band, for fixed bias voltage of 1500 V (electric field[r] ... See full document

... According to these input parameters, in the neural networks and genetic programming models, the splitting tensile strength and water absorption values of concretes containing ZnO 2 na[r] ... See full document

... The results showed that the urethane structural adhesive promoted the efficient bonding of these materials, considering that due to the high adhesive strength the failures occurred in [r] ... See full document

... The higher M s values obtained for samples sintered at high sintering temperatures may be associated with the different oxidation states and distribution of cations amongst the latti[r] ... See full document

... For the CEG sample the degradation processes occurs by random nucleation and probably starts on the cellulose amorphous domains while for CPT, that had more crystallinity regions than[r] ... See full document

... Figure 7. Variation of room temperature tensile properties with cooling rate... It is established that TiAl alloys with a predominant lamellar microstructure have good comprehensive p[r] ... See full document

... Therefore, the aim of this study was to test the hypothesis that there is a direct relationship between surface structure and tensile strength of orthodontic alloys submitted to spot-[r] ... See full document

... It can be concluded that the composite has shown a good chemical stability and physical integrity in pH values ranging from 3.0 to 9.0, which is the commonly used range for arsenic ad[r] ... See full document

... An H tester (VMHT MOT, Leica Microsystems Wetzlar GmbH, Germany) with Knoop diamond indenter was used under a 5 gf load for 15 seconds. The test was performed for dry and wet disk-shaped (1 mm thick × 5 mm in ... See full document

... To model tensile strength of functionally graded steels it has been assumed that the austenitic functionally graded steel consists of mγ layers and ferritic functionally graded steel [r] ... See full document

... From XRD results in the present study, the HA-blasting method used (announced) by the implant manufacturer of the group 4 to incorporate HA on titanium surface seems to be an efficien[r] ... See full document

... To evaluate the hydrophobicity of polymeric outdoor insulator surfaces, which are direct associated with the aging of materials, three digital image processes, the fractal dimension a[r] ... See full document

... more accuracy. Also, it is important to note that the material under investigation is indeed transversally isotropic and the Poisson’s ratio from plane 3-1 is equal to that from plane [r] ... See full document