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Interaction of boron suboxide with compacted graphite cast iron. Short communication

: Freemantle, C.S.; Johnson, O.T.; Sigalas, I.; Herrmann, M.


Ceramics international : CI 37 (2011), Nr.3, S.1121-1125
ISSN: 0272-8842
Fraunhofer IKTS ()
cutting tools; boron suboxide; microstructure; machining

The chemical interaction of boron suboxide (B6O) with compacted graphite cast iron (CGI) was investigated using static interaction diffusion couples between B6O and CGI at 700 °C, 900 °C and 1100 °C for 1 h. This interaction offers the possibility to evaluate the potential of B6O as a cutting tool. The microstructures and phase compositions of the interaction zones were investigated. At 700 °C and 900 °C the chemical interaction was minimal. However, at 1100 °C, Fe2B and SiO2 were formed at the interface. Hence, machining at 1100 °C is likely to result in chemical wear.