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Zang Jian-bing, Wang Ming-zhi, Wang Yan-hui. EFFECT OF ZrO2 POWDER FORM ON THE STRUCTURE AND PROPERTIES OF SiC/DIAMOND COMPOSITE[J]. Acta Materiae Compositae Sinica, 1998, 15(1): 35-38.
Citation: Zang Jian-bing, Wang Ming-zhi, Wang Yan-hui. EFFECT OF ZrO2 POWDER FORM ON THE STRUCTURE AND PROPERTIES OF SiC/DIAMOND COMPOSITE[J]. Acta Materiae Compositae Sinica, 1998, 15(1): 35-38.
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EFFECT OF ZrO2 POWDER FORM ON THE STRUCTURE AND PROPERTIES OF SiC/DIAMOND COMPOSITE

  • Yanshan University, Qinhuangdao 066004

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  • Received Date: March 09, 1997
  • Revised Date: May 06, 1997
    Abstract
  • Nanocrystalline ZrO2 (Y2O3) powder with different particle sizes was prepared by a boiling hydrolysis method. SiC/ diamond composite toughened with the ZrO2 (Y2O3) was sintered at high temperature (1350℃) and ultra high pressure (5GPa). The phase structure and mechanical properties of the sintered material were investigated by TEM, SEM, XRD and the measurements of impact toughness and G ratio. The results showed that the amount of t ZrO2 in the sintered material increases with boiling hydrolysis time during ZrO2 powder preparation. 100% t ZrO2 was obtained and the particle size distribution is homogeneous on the SiC bonded phase with the boiling hydrolysis time more than 50hr. More than 20vol% of t ZrO2 is transformed to m ZrO2 during the fracture process. The SiC/ diamond composite has a combination property of high impact toughness and high G ratio.
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