Abstract
This study investigated the microstructure and high temperature oxidation property of Fe–Cr–B metal/ceramic composite manufactured using powder injection molding process. Observations of initial microstructure showed a unique structure where α-Fe and (Cr, Fe)2B form a continuous three-dimensional network. High temperature oxidation tests were performed at 900, 1000 and 1100 °C, for 24 h, and the oxidation weight gain according to each temperature condition was 0.13, 0.84 and 6.4 mg/cm2, respectively. The oxidation results according to time at 900 and 1000 °C conditions represented parabolic curves, and at 1100 °C condition formed a rectilinear curve. Observation and phase analysis results of the oxides identified Cr2O3 and SiO2 at 900 and 1000 °C. In addition to Cr2O3 and SiO2, CrBO3 and FeCr2O4 formed due to phase decomposition of boride were identified at 1100 °C. Based on the findings above, this study suggested the high temperature oxidation mechanism of Fe–Cr–B metal/ceramic composite manufactured using powder injection molding, and the possibility of its application as a high temperature component material was also discussed.
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Joo, YA., Kim, YK., Yoon, TS. et al. Microstructure and High Temperature Oxidation Property of Fe–Cr–B Based Metal/Ceramic Composite Manufactured by Powder Injection Molding Process. Met. Mater. Int. 24, 371–379 (2018). https://doi.org/10.1007/s12540-018-0053-3
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DOI: https://doi.org/10.1007/s12540-018-0053-3