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Sintering temperature effect on structure and properties of Al2O3/Ni-P composites with interpenetrating phases

Jakub Michalski 2Michal J. Wozniak 2Katarzyna Konopka 2Jerzy Bielinski 3Stanisław Gierlotka 1Krzysztof J. Kurzydlowski 2

1. Polish Academy of Sciences, High Pressure Research Center (UNIPRESS), Sokolowska 29/37, Warszawa 01-142, Poland
2. Warsaw University of Technology, Faculty of Materials Science and Engineering (InMat), Wołoska 141, Warszawa 02-507, Poland
3. Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, Warszawa 00-664, Poland


A ceramic metal composite Al2O3/Ni-P was obtained by hot pressing of alumina powder, covered by Ni-P nanoparticles trough chemical plating. Room temperature, 600oC and 1000oC were used in these experiments to consolidate the coated powders. The consolidated and sintered specimens were investigated by SEM, TEM/HRTM, MFM (magnetic force microscope) and hardness test. They revealed that this fabrication method results in a structure of interpenetrating phases with high electric conductivity. It has been also found that samples consolidated at room temperature and sintered at 600oC maintain nanometric grain size of the metallic phase whilst the grains of Ni-P sintered in 1000oC are re-crystallized. The hardness was also investigated, and is discussed in terms of fabrication temperature and structure of obtained composites.


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Presentation: poster at E-MRS Fall Meeting 2004, Symposium G, by Jakub Michalski
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-08-19 20:41
Revised:   2009-06-08 12:55