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:
Ca3(PO4)2/ZrO2 dental composite ceramics using for CAD/CAM system were prepared and theeffects of weak phases on microstructures and mechanical properties were studied. The results showedthat intergranular spreads happened with the increasing Ca3(PO4)2 contents due to the discontinuity ofweak interfaces between Zirconia and Calcium phosphate in matrix. So the flexural strength and hardnessof the Ca3(PO4)2/ZrO2 composite ceramics were decreased effectively, which improved the machinabilityof the composites. On the other hand, strong interfaces between Zirconias increased the integrality of theceramic structures. ZrO2 composite Ceramics with 15% Ca3(PO4)2 were sintered at 1350°C. The flexuralstrength is 300.44MPa, fracture toughness is 4.36 MPam1/2, and hardness is 6.69 GPa. The cutting exponentof the Ca3(PO4)2/ZrO2 composite ceramics is obviously lower than that of the common commercialVita Mark II and Dicor MGC ceramics, which shows good mechanical properties and machinability
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1587.pdf
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