EFFECT OF SURFACE MODIFICATION ON THE PROPERTIES OFYAG–ZrB2CERAMICS

Jie-Guang Song (), Shi-Bin Li, Yin-Yan Ju, Da-Ming Du, Yu-Wei Wang and Lian-Meng Zhang
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Jie-Guang Song: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
Shi-Bin Li: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
Yin-Yan Ju: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
Da-Ming Du: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
Yu-Wei Wang: School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China
Lian-Meng Zhang: State Key Lab of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Surface Review and Letters (SRL), 2009, vol. 16, issue 02, 281-286

Abstract: ZrB2belongs to a class of ceramics defined ultra-high-temperature ceramics with extremely high melting temperatures; however,ZrB2ceramics is easily oxidized. To makeZrB2ceramics possess the better oxidation resistance in the air at high temperature, in this paper, the effect of surface modification on the properties of YAG–ZrB2ceramics were investigated. Fracture toughness of sintered ceramics with coated raw materials is higher than that of sintered ceramics with mixed raw materials under the same phase and phase content conditions. Oxidation layer thickness of sintered ceramics with coated raw materials is thinner than that of sintered ceramics with mixed raw materials. The results indicate that the sintered coated structure ceramics with coated raw materials help to increase the mechanical property and oxidation resistance of YAG–ZrB2ceramics.

Keywords: ZrB2; YAG; core-shell composite particles; surface modification; oxidation resistance (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012597

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