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- 정전 분무법을 이용하여 제조된 Fe-Cr-Al 분말 다공체 금속의 고온 산화에 미치는 소결 온도의 영향
- 오재성, 공영민, 김병기, 이기안
- Effect of Sintering Temperature on the High Temperature Oxidation of Fe-Cr-Al Powder Porous Metal Manufactured by Electrospray Process
- Jae-Sung Oh, Young-Min Kong, Byoung-Kee Kim, Kee-Ahn Lee
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Journal of Korean Powder Metallurgy Institute 2012;19(6):435-441
DOI: https://doi.org/10.4150/KPMI.2012.19.6.435
2울산대학교 첨단신소재공학부
3울산대학교 첨단신소재공학부
4안동대학교 신소재공학부
1School of Advanced Materials Engineering, Andong National University
2School of Materials Science & Engineering, University of Ulsan
3School of Materials Science & Engineering, University of Ulsan
4School of Advanced Materials Engineering, Andong National University
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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°C, 1400°C, 1450°C, and 1500°C, respectively, in H_2 atmospheres. A 24-hour TGA (thermo gravimetric analysis) test was conducted at 1000°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°C sintered specimen). The high temperature oxidation mechanism of newly manufactured Fe-Cr-Al powder porous metal was also discussed.
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