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Fabrication of an Al 2 O 3 /YAG/ZrO 2 Ternary Eutectic by Combustion Synthesis Melt Casting Under Ultra‐High Gravity
Author(s) -
Liang Rui,
Pei Jun,
Li Jiangtao,
Jin Haibo,
Chen Kexin
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02911.x
Subject(s) - materials science , microstructure , eutectic system , ceramic , fabrication , porosity , casting , ternary operation , metallurgy , rod , vickers hardness test , fracture toughness , composite material , alternative medicine , pathology , computer science , programming language , medicine
This work presents a novel method for preparing an Al 2 O 3 /YAG/ZrO 2 ternary eutectic whereby combustion synthesis melt casting has been combined with the ultra‐high gravity (UHG) technique. The fabricated product had a relative density of 99.3% of the theoretical one. Phase composition and microstructure analyses indicated that the application of UHG resulted in a metal‐free ceramic microstructure with no porosity or microcracks. The microstructure comprises ZrO 2 rods dispersed in Al 2 O 3 . The product had 17.82 GPa Vickers hardness and 5.51 MPa·m 1/2 fracture toughness.