Paper Title:
New Integrated Cermet Powder Preparation and Consolidation Method–Ni-ZrO2 Case
  Abstract

A new integrated method for direct preparation of cermet materials is proposed consisting of a powder processing method allied to a special sintering step. The powder is obtained by mechanical alloying route where a specific morphologic design is searched to yield thin metal plated ceramic particles. These have the proper characteristics to engage the sintering by activated surface (SAS) consolidation method. The last is triggered by partial evaporation and reactive sintering of thin metal layers, therefore exposing high active surfaces with superior sinterability. Refractory sacrifice metal components are found to play an important role. The application of the integrated method to Ni-ZrO2 cermet with selected metal additives is investigated. Sintering temperatures can be reduced by more than 300°C for the same final density range. The resulted powders and pellets microstructures are analysed accordingly to the projected expected ones. The thermophysical and electrical properties measurements are performed for evaluate phases percolation.

  Info
Periodical
Materials Science Forum (Volumes 660-661)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
370-376
DOI
10.4028/www.scientific.net/MSF.660-661.370
Citation
T. A. G. Restivo, S. R. H. de Mello-Castanho, "New Integrated Cermet Powder Preparation and Consolidation Method–Ni-ZrO2 Case", Materials Science Forum, Vols. 660-661, pp. 370-376, 2010
Online since
October 2010
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Price
$32.00
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