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:
Y-TZP presents excellent properties at room temperature but these properties decrease asthe temperature increases. This paper studies the behavior 20vol%Si3N4-SiC when added in YTZPmatrix and heated under no pressure system. Al2O3 and Y2O3 were used to maintain the stability ofthe matrix and as sintering aids. The addition of Si3N4 and SiC in a Y-TZP matrix leads toformation of silicon oxynitride and it increases the mechanical properties like toughness andhardness. The mixture was milled and molded by CIP. Samples were heated at 1500ºC, 1600ºC and1700ºC for 2h without pressure under atmospheric conditions in bed-powders of Si3N4. Sampleswere characterized by XRD. Density, hardness, toughness, bending strength were measured. Thestructure of the material was observed in SEM/EPMA to verify the distribution of the materials inthe composite. The formation of Si2N2O was observed in the sintered material and it showed anincrement of both hardness and toughness as temperature increases. The samples presentedconsiderable resistance of oxidation at 1000ºC
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.415.pdf
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