Author
N. Bertolino
Bio: N. Bertolino is an academic researcher from University of California, Davis. The author has contributed to research in topics: Combustion & Electric current. The author has an hindex of 3, co-authored 3 publications receiving 185 citations.
Papers
More filters
TL;DR: In this paper, the authors investigated the effect of the electric current independent from the thermal effect in phase formation and transformation in the system of Al-AuSolid-Solid diffusion couples.
112 citations
TL;DR: In this article, the influence of high dc currents on the interaction between thin Au-Al layers was investigated over the temperature range 400-500°C, in both the absence and the presence of a current at all levels.
Abstract: The influence of high dc currents (up to 1019 A cm−2) on the interaction between thin Au-Al layers was investigated over the temperature range 400-500°C In contrast with earlier diffusion couple results, only four of the five intermetalllic compounds in this system were observed, in both the absence and the presence of a current at all levels The intermetallics Au5 Al2 and Au2 Al were the dominant products while AuAl and AuAl2 were relatively insignificant The latter showed little change, growing only to a total thickness of a few micrometres, regardless of the magnitude of the current density and time of annealing While the sequence of formation of the different intermetallics was not affected by the current, the incubation time and rate of growth of the layers were strongly influenced The incubation time for the appearance of a measurable product layer was markedly reduced by the current, by nearly two orders of magnitude in some cases The effect of the current on the nucleation of the pr
59 citations
TL;DR: In this article, the synthesis of vanadium silicides was investigated using the field-activated combustion synthesis technique, and the reaction mechanism was investigated through the use of quenching experiments.
25 citations
Cited by
More filters
TL;DR: In this article, the use of electric current to activate the consolidation and reaction-sintering of materials is reviewed with special emphasis of the spark plasma sintering method, which has been used extensively over the past decade with results showing clear benefits over conventional methods.
Abstract: The use of electric current to activate the consolidation and reaction-sintering of materials is reviewed with special emphasis of the spark plasma sintering method. The method has been used extensively over the past decade with results showing clear benefits over conventional methods. The review critically examines the important features of this method and their individual roles in the observed enhancement of the consolidation process and the properties of the resulting materials.
1,855 citations
TL;DR: Combustion synthesis has emerged as a facile and economically viable technique for the preparation of advanced ceramics, catalysts and nanomaterials as discussed by the authors, and recent innovations in the combustion and processing parameters have resulted in a better understanding of combustion phenomena and control of microstructure and property of the products.
Abstract: Combustion synthesis has emerged as a facile and economically viable technique for the preparation of advanced ceramics, catalysts and nanomaterials. Recent innovations in the combustion and processing parameters have resulted in a better understanding of combustion phenomena and control of microstructure and property of the products.
767 citations
TL;DR: In this paper, the authors focus on the fundamental aspects of the sintering process and identify the intrinsic benefits of the use of the parameters of current (and pulsing), pressure, and heating rate.
Abstract: The phenomenal increase during the past decade in research utilizing pulsed electric current to activate sintering is attributed generally to the intrinsic advantages of the method relative to conventional sintering methods and to the observations of the enhanced properties of materials consolidated by this method. This review focuses on the fundamental aspects of the process, discussing the reported observations and simulation studies in terms of the basic aspects of the process and identifying the intrinsic benefits of the use of the parameters of current (and pulsing), pressure, and heating rate.
567 citations
TL;DR: In view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record as discussed by the authors, which may be seen as a good starting point for further research.
Abstract: IN view of the interest attaching to the vaporisation and diffusion of solids, the following observations may be worthy of record.
560 citations
15 Mar 2005-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, current and heat generation gradients were evaluated in the radial and axial directions for both cases, in order to investigate current and temperature distributions under typical spark plasma sintering (SPS) conditions.
Abstract: Modeling and experimental analyses were carried out to investigate current and temperature distributions under typical spark plasma sintering (SPS) conditions. The simulation utilized two sample materials with widely differing electrical conductivities, alumina and copper. Current and heat generation gradients were evaluated in the radial and axial directions for both cases. Radial gradients result in significant differences in temperature between the surface of the graphite die and its center, in agreement with experimental measurements. Axial gradients are shown to influence the homogeneity of the product.
526 citations