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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 발행연도
- 2014
- 저작권
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Sintered stainless steel have been produced as automobile exhaust unit, porous filter, turbo compressor, and high temperature resistant parts. Commonly, the sintered body manufactured by powder metallurgy has pores in the surface and inside and the pores mainly affect the mechanical characteristics, the oxidative stability and even the corrosion resistance.
Researchers have reported that high-temperature oxidation behavior of the sintered parts are different from that of the wrought stainless steel. In order to improve the high temperature oxidative stability of stainless steel, researchers have focused on the effect of additive elements such as rare metals and metallic oxides.
In this paper, based on a series of datum about STS 316L high-temperature oxidation behavior analysis, the oxidation behavior of STS 316L sintered parts at 900℃ and 1000℃ with different addition of metallic oxides was discussed.
As a result, the weight of STS 316L sintered body increased sharply at 1000℃ and the relative density of specimen decreased as metallic oxide addition increased. Compared with STS 316L sintered parts, weight gain ratio corresponding to different oxidation time at 900℃ and 1000℃, decreased gradually with the addition of metallic oxide. X-ray diffraction (XRD) results presented that the gamma pick of specimen with 3vol.% of Y2O3 addition can be observed after 210 hours corrosion at 1000℃. The growth rate of surface oxide layer of specimen with Y2O3 addition was slow and it still maintained certain adhesion until 210 hours test.
Researchers have reported that high-temperature oxidation behavior of the sintered parts are different from that of the wrought stainless steel. In order to improve the high temperature oxidative stability of stainless steel, researchers have focused on the effect of additive elements such as rare metals and metallic oxides.
In this paper, based on a series of datum about STS 316L high-temperature oxidation behavior analysis, the oxidation behavior of STS 316L sintered parts at 900℃ and 1000℃ with different addition of metallic oxides was discussed.
As a result, the weight of STS 316L sintered body increased sharply at 1000℃ and the relative density of specimen decreased as metallic oxide addition increased. Compared with STS 316L sintered parts, weight gain ratio corresponding to different oxidation time at 900℃ and 1000℃, decreased gradually with the addition of metallic oxide. X-ray diffraction (XRD) results presented that the gamma pick of specimen with 3vol.% of Y2O3 addition can be observed after 210 hours corrosion at 1000℃. The growth rate of surface oxide layer of specimen with Y2O3 addition was slow and it still maintained certain adhesion until 210 hours test.
목차
제 1 장. 서 론 1제 2 장. 이론적 배경 62.1 금속의 산화 62.2 스테인리스강의 산화 11제 3 장. 실험방법 143.1 시편제조공정 143.1.1 원료분말 준비 143.1.2 혼합공정 193.1.3 성형공정 223.1.4 소결공정 233.2 고온 산화 실험 243.3 미세조직 관찰 및 생성상 분석 253.3.1 미세조직 관찰(SEM 및 OM) 253.3.2 상 분석(X-ray, EDS) 25제 4 장. 실험결과 및 고찰 264.1 STS 316L 소결체의 고온산화실험 264.2 금속 산화물 첨가에 따른 STS 316L 소결체의 상대밀도 314.3 금속 산화물 첨가에 따른 STS 316L 소결체의 고온산화실험 344.4 금속 산화물 첨가에 따른 STS 316L 소결체의 XRD 분석결과 384.5 금속 산화물 첨가에 따른 STS 316L 소결체의 미세조직관찰 404.6 금속 산화물 첨가에 따른 STS 316L 소결체의 EDS 분석 43제 5 장. 결론 48References 49
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