Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Sintering Temperature on the High Temperature Oxidation of Fe-Cr-Al Powder Porous Metal Manufactured by Electrospray Process

정전 분무법을 이용하여 제조된 Fe-Cr-Al 분말 다공체 금속의 고온 산화에 미치는 소결 온도의 영향

  • Oh, Jae-Sung (School of Advanced Materials Engineering, Andong National University) ;
  • Kong, Young-Min (School of Materials Science & Engineering, University of Ulsan) ;
  • Kim, Byoung-Kee (School of Materials Science & Engineering, University of Ulsan) ;
  • Lee, Kee-Ahn (School of Advanced Materials Engineering, Andong National University)
  • 오재성 (안동대학교 신소재공학부) ;
  • 공영민 (울산대학교 첨단신소재공학부) ;
  • 김병기 (울산대학교 첨단신소재공학부) ;
  • 이기안 (안동대학교 신소재공학부)
  • Received : 2012.10.30
  • Accepted : 2012.11.29
  • Published : 2012.12.28
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Abstract

A new manufacturing process of Fe-Cr-Al powder porous metal was attempted. First, ultra-fine fecralloy powders were produced by using the submerged electric wire explosion process. Evenly distributed colloid (0.05~0.5% powders) was dispersed on PU (Polyurethane) foam through the electrospray process. And then degreasing and sintering processes were conduced. In order to examine the effect of sintering temperature in process, pre-samples were sintered for two hours at temperatures of $1350^{\circ}C$, $1400^{\circ}C$, $1450^{\circ}C$, and $1500^{\circ}C$, respectively, in $H_2$ atmospheres. A 24-hour TGA (thermo gravimetric analysis) test was conducted at $1000^{\circ}C$ in a 79% $N_2$+21% $O_2$ to investigate the high temperature oxidation behavior of powder porous metal. The results of the high temperature oxidation tests showed that oxidation resistance increased with increasing sintering temperature (2.57% oxidation weight gain at $1500^{\circ}C$ sintered specimen). The high temperature oxidation mechanism of newly manufactured Fe-Cr-Al powder porous metal was also discussed.

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References

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