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The effect of boron on the hardness and fracture toughness of WC-FeAI-B and WC-Ni3Al-B composites

Conference Paper


Abstract


  • The hardness and indentation fracture toughness of sub micron WC composites based on aluminide and cobalt binders were investigated. Doped Fe 60Al40 and Ni3Al alloys with boron levels ranging from 0 to 0.1 wt%, were used as the aluminide binders. The composite materials were processed by uniaxial hot pressing of milled powder samples at 1500°C under argon atmosphere. The hardness of WC-40vol%(FeAl-B) was found to be higher than that of WC-40vol%(Ni3Al-B), and it approached to the hardness level of the commercial grade of WC-10wt%Co (HlOF). The fracture toughness of both WC-40vol%(FeAl-B) and WC-40vol%(Ni3Al-B) cermets was higher than that of WC-40vol%Co and the toughness increased with increasing boron content. It is believed that boron addition to the aluminide binders leads to improvement in the fracture toughness of the intermetallic matrix composites as a result of increase in the ductility and toughness of the aluminides and also due to increase in WC solubility in the aluminide binders in presence of boron.

Publication Date


  • 2007

Citation


  • Ahmadian, M., Wexler, D., Calka, A., & Chandra, T. (2007). The effect of boron on the hardness and fracture toughness of WC-FeAI-B and WC-Ni3Al-B composites. In Materials Science Forum Vol. 539-543 (pp. 962-967). doi:10.4028/0-87849-428-6.962

Scopus Eid


  • 2-s2.0-38349063162

Web Of Science Accession Number


Start Page


  • 962

End Page


  • 967

Volume


  • 539-543

Issue


  • PART 1

Abstract


  • The hardness and indentation fracture toughness of sub micron WC composites based on aluminide and cobalt binders were investigated. Doped Fe 60Al40 and Ni3Al alloys with boron levels ranging from 0 to 0.1 wt%, were used as the aluminide binders. The composite materials were processed by uniaxial hot pressing of milled powder samples at 1500°C under argon atmosphere. The hardness of WC-40vol%(FeAl-B) was found to be higher than that of WC-40vol%(Ni3Al-B), and it approached to the hardness level of the commercial grade of WC-10wt%Co (HlOF). The fracture toughness of both WC-40vol%(FeAl-B) and WC-40vol%(Ni3Al-B) cermets was higher than that of WC-40vol%Co and the toughness increased with increasing boron content. It is believed that boron addition to the aluminide binders leads to improvement in the fracture toughness of the intermetallic matrix composites as a result of increase in the ductility and toughness of the aluminides and also due to increase in WC solubility in the aluminide binders in presence of boron.

Publication Date


  • 2007

Citation


  • Ahmadian, M., Wexler, D., Calka, A., & Chandra, T. (2007). The effect of boron on the hardness and fracture toughness of WC-FeAI-B and WC-Ni3Al-B composites. In Materials Science Forum Vol. 539-543 (pp. 962-967). doi:10.4028/0-87849-428-6.962

Scopus Eid


  • 2-s2.0-38349063162

Web Of Science Accession Number


Start Page


  • 962

End Page


  • 967

Volume


  • 539-543

Issue


  • PART 1