ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A comparative study between alumina added niobia ceramics and two alumina zirconiacomposites from nanostructured TZP (7% and 14% weight) was made. On this composites thezirconia were yttria stabilized and the alumina were submicron structured. As sintering aid amixture of magnesia, niobia and talc were used on all samples. The sintering was performed at1450 oC during 60 minutes. The characteristic grain size and shape of an alumina and zirconiapowders, aggregates and agglomerates were characterized. The sintering ceramics were evaluatedthrough hardness, fracture toughness and 4 point bending test. Weibull statistic was applied on theflexural results. Although the fracture toughness result from ZTA were lower, and seems to beaffected by the liquid fase, the hardness and Weibull modulus were higher than alumina niobia. Thegrains size and the homogeneity of its distributions on the microstructure of this ceramics wascorrelated to these higher values. The results from these alumina zirconia composites showed apotential to apply as a ballistic armor material
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.436.pdf
