Microstructure and mechanical properties of ZrO2 ceramics toughened by 5-20 vol% Ta metallic particles fabricated by pressureless sintering

Ceram. Int. 40, 1829-1834 (2014)

Smirnov, A; Bartolome, JF.

 

Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), C/ Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.

Abstract

 

ZrO2-based composites toughened by 5, 10, 15 and 20 vol% lamellar shape Ta metallic particles were made by pressureless sintering. The microstructure and mechanical properties of these novel ceramic metal composites have been studied. With only 15 vol%, the toughness ofZrO(2)-Ta composites was increased from 9.1 of monolithic zirconia to 14 MPa m(1/2) and the average bend strength was 700 MPa. Our results have demonstrated that zirconia transformation and ductile phase toughening concepts can get together to enhance the fracture toughness of zirconia-based materials with high strength.

 

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ZrO2 ceramics

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