ISSN:
1013-9826
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:
This paper explores the effects of dopant content on the aging behavior of tetragonal zirconiapolycrystal (TZP). TZP powders with varying Y2O3 content (1.75-3mol%) were synthesized by co-precipitation.After the green body of as-prepared TZP powders being isostatically pressed at 200 MPa andsintered at 14000C for 3 h in air, a range of TZP ceramics were fabricated. As-synthesized TZP ceramicsannealed at relatively low temperatures with the presence of water or water vapor. XRD analysis wasconducted for phase identification and determined a tetragonal to monoclinic transformation. Microscopeimaging displayed the changes of aged TZP surface structure. It is believed that the degradation of TZPmight be caused by the reaction between Y2O3 and H2O. The mechanism of low temperature degradationof TZP was discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1188.pdf
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