Papers by Author: Elíria Maria Jesus Agnolon Pallone

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Authors: Daniel Rodrigo Leiva, Elíria Maria Jesus Agnolon Pallone, Roberto Tomasi, Walter José Botta Filho
493
Authors: Elíria Maria Jesus Agnolon Pallone, V. Trombini, Walter José Botta Filho, Roberto Tomasi
65
Authors: V. Trombini, Elíria Maria Jesus Agnolon Pallone, F.C. Mello, Walter José Botta Filho, Roberto Tomasi
475
Authors: Adriana Scoton Antonio Chinelatto, Milena K. Manosso, Elíria Maria Jesus Agnolon Pallone, Adilson Luiz Chinelatto
Abstract: The control of the heating curve to manipulate microstructure during sintering is a way that has being studied and it presents advantages such as simplicity and economy. In this work, it was studied the sintering in two-steps of a commercial ultrafine alumina. For this, the alumina power was deagglomerated in milling ball and the specimens for sintering were pressed. Sintering was performed in a dilatometer, with constant heating rate of 15°C/min up to 1500°C. By these results, heat treatment temperatures for two-step sintering were defined. The sintering specimens were characterized through the apparent density measures using Archimedes method, the grain size measures using image analysis program and microstructural analysis using a scanning electron microscope. The results showed that the two-step sintering influence in the development of the final microstructure and permit the control of the grain size and density.
611
Authors: Elíria Maria Jesus Agnolon Pallone, D.E. Hanai, Roberto Tomasi, Walter José Botta Filho
289
Authors: K.L. Silva, L.O. Bernardi, Makoto Yokoyama, Vania Trombini, Carlos Alberto Alves Cairo, Elíria Maria Jesus Agnolon Pallone
Abstract: The addition of nanometric particles of a second phase into ceramics matrix is one of the most recent alternatives in the development of materials with high mechanical properties and wear resistance. These nanostructured materials can be defined as systems that have at least one microstructural characteristic of nanometric dimensions (less 100nm). In this work aluminadiamond nanocomposites were produced using diamond nanometric powders obtained by high energy milling. Diamond powder was produced in the SPEX shaker/mill during 6h, with a ball-tomass ratio of 4:1. The crystallite size was 30nm. After the elimination of the Fe deriving of the contamination during the milling, and desaglomeration, this nanometric powder was added in the alumina matrix in the ratio of 5wt%. The powder densification was performed by hot pressing sintering. The obtained nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and microhardness, and they have promising characteristics regarding abrasion and wear resistance.
766
Authors: Adriana Scoton Antonio Chinelatto, O.A. Contardi, Elíria Maria Jesus Agnolon Pallone, Roberto Tomasi
208
Authors: Roberto Tomasi, Elíria Maria Jesus Agnolon Pallone, Walter José Botta Filho
333
Authors: Elíria Maria Jesus Agnolon Pallone, Daniel Rodrigo Leiva, Roberto Tomasi, Walter José Botta Filho
38
Authors: Elíria Maria Jesus Agnolon Pallone, Roberto Tomasi, Walter José Botta Filho
393
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