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Metals and Materials International

, Volume 24, Issue 2, pp 371–379 | Cite as

Microstructure and High Temperature Oxidation Property of Fe–Cr–B Based Metal/Ceramic Composite Manufactured by Powder Injection Molding Process

  • Yeun-Ah Joo
  • Young-Kyun Kim
  • Tae-Sik Yoon
  • Kee-Ahn Lee
Article

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.

Keywords

Fe–Cr–B based alloy Powder injection molding Metal/ceramic composite Three dimensional network structure Oxidation mechanism 

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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringInha UniversityIncheonKorea
  2. 2.Bestner CoEumseongKorea

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