Material properties of tungsten carbide-alumina composites fabricated by spark plasma sintering

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

研究成果: Article

11 引文 斯高帕斯(Scopus)

摘要

The densification behavior of WC-Al2O3 composites prepared via spark plasma sintering (SPS) was investigated. The initial materials were fabricated using a metal-organic chemical vapor deposition process in which W(CO)6 was used as a precursor and Al 2O3 powder was used as the matrix in a spouted bed. The decomposed W(CO)6 produced W species that coated Al2O 3. Then, carburization, using a mixture of CH4-H 2 gas, was used to form tungsten carbide-alumina composite powder. This powder was sintered via SPS in the temperature range of 1200-1350 °C, which produced several secondary phases, namely W, WC, and W2C. At the highest sintering temperature (1350 °C), the intermediate phase WC decomposed to form W2C. The material properties of the SPS-treated samples, including density, hardness, and electrical resistivity, were investigated. The hardness and electrical resistivity of WC-Al2O 3 composites were found to be approximately 22.4 GPa and 4.9×109 Ω cm, respectively.

原文English
頁(從 - 到)15007-15012
頁數6
期刊Ceramics International
40
發行號9 PART B
DOIs
出版狀態Published - 2014 一月 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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