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Яна Дятлова
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Alumina/IO wt% Sic nanocomposites were prepared by using a number of processing techniques, in or... more Alumina/IO wt% Sic nanocomposites were prepared by using a number of processing techniques, in order to produce d@erent microstructures while keeping a uniform distribution of the Sic particles in the alumina matrix. Basically, this study used three techniques, i. e. mechanical mixture qf powders, the use of an inorganic precursor for alumina precipitated onto Sic particles and the use of dIrerent polymeric precursors for Sic precipitated on alumina particles. Hot pressing at 1700°C was necessary to produce fully dense nanocomposites. The alumina precursor route produced the smallest matrix grain size and the Sic precursor route produced the smallest reinfbrcement particle size. Despite the d$erences in microstructure between the nanocomposites, the flexure strength remained the same, and no distinct improvement over the monolithic alumina was observed. The fracture mode, however, changed from intergranular to transgranular with the presence of the Sic particles. 0 1997 Elsevier Science Limited. All rights reserved.
Alumina/IO wt% Sic nanocomposites were prepared by using a number of processing techniques, in or... more Alumina/IO wt% Sic nanocomposites were prepared by using a number of processing techniques, in order to produce d@erent microstructures while keeping a uniform distribution of the Sic particles in the alumina matrix. Basically, this study used three techniques, i. e. mechanical mixture qf powders, the use of an inorganic precursor for alumina precipitated onto Sic particles and the use of dIrerent polymeric precursors for Sic precipitated on alumina particles. Hot pressing at 1700°C was necessary to produce fully dense nanocomposites. The alumina precursor route produced the smallest matrix grain size and the Sic precursor route produced the smallest reinfbrcement particle size. Despite the d$erences in microstructure between the nanocomposites, the flexure strength remained the same, and no distinct improvement over the monolithic alumina was observed. The fracture mode, however, changed from intergranular to transgranular with the presence of the Sic particles. 0 1997 Elsevier Science Limited. All rights reserved.