Mechanical properties of 2O3-Cr2O3/Cr3C2 nanocomposite fabricated by spark plasma sintering

Hao Tung Lin, Pramoda K. Nayak, Bo Zon Liu, Wei Hsio Chen, Jow Lay Huang

研究成果: Article

8 引文 斯高帕斯(Scopus)

摘要

The fine grains of Al2O3-Cr2O3/Cr-carbide nanocomposites were prepared by employing recently developed spark plasma sintering (SPS) technique. The initial materials were fabricated by a metal organic chemical vapor deposition (MOCVD) process, in which Cr(CO)6 was used as a precursor and Al2O3 powders as matrix in a spouted chamber. The basic mechanical properties like hardness, fracture strength and toughness, and the nanoindentation characterization of nanocomposites such as Elastics modulus (E), elastic work (We) and plastic work (Wp) were analyzed. The microstructure of dislocation, transgranular and step-wise fracture surface were observed in the nanocomposites. The nanocomposites show fracture toughness of (4.8MPam1/2) and facture strength (780MPa), which is higher than monolithic alumina. The strengthening mechanism from the secondary phase and solid solution are also discussed in the present work. Nanoindentation characterization further illustrates the strengthening of nanocomposites.

原文English
頁(從 - 到)77-83
頁數7
期刊Journal of the European Ceramic Society
32
發行號1
DOIs
出版狀態Published - 2012 一月 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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