Articles
  • Oxidation behavior of YAG-ZrB2 ceramics prepared by spark plasma sintering 
  • Jie-Guang Songa,b*, Da-Ming Dua, Yin-Yan Jua, Yang-Liang Lia, Shi-Bin Lia,b, and Gang-Chang Jib
  • a School of Mechanical and Materials Engineering, Jiujiang University, Jiujiang 332005, China b Jiujiang Key Laboratory of Green Remanufacturing, Jiujiang University, Jiujiang 332005, Jiangxi, China
Abstract
ZrB2 and VAG are widely applied because of some excellent properties, but ZrB2 is easily oxidized in high-temperature air. To make ZrB2 ceramics have better oxidation resistance, high-density YAG-ZrB2 ceramics were prepared. The oxidation behavior of YAG-ZrB2 ceramics is investigated at different temperatures. The results indicate that the enhanced weight change differs according to the temperature range, slightly in the temperature 900-1000 degrees C, sharply from 1100-1300 and smoothly above 1300 degrees C. The weight change rate of YAG-ZrB2 ceramics is increased by prolonging the oxidation time, but the weight change rate of YAG-ZrB2 ceramics is gradually reduced. The oxidation layer is porous as compared to the YAG-ZrB2 ceramics layer.

Keywords: ZrB2; YAG; Ceramics; Oxidation; High temperature

This Article

  • 2010; 11(4): 494-497

    Published on Aug 31, 2010