AZ31 마그네슘 합금의 고온산화에 미치는 CaO 첨가 영향
Effect of CaO Addition on the High-temperature Oxidation of AZ31 Magnesium Alloys
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Magnesium alloys of AZ31 containing (0.5, 1, 1.5) wt.% of initially added CaO particles were cast in air, and their oxidation behavior was studied at 450-650oC in air. The initially added CaO particles either decomposed to dissolve in the α-Mg matrix or precipitated as Al2Ca along the grain boundaries of the matrix during casting. The ignition temperatures were 565.4oC for AZ31, 608.6oC for AZ31+0.5 wt.%CaO, and 689.7oC for AZ31+1 wt.%CaO. No ignition occurred for AZ31+1.5 wt.%CaO up to 700oC, displaying good oxidation resistance. The CaO-rich oxide scales that formed on the surface of the AZ31+(0.5, 1, 1.5) wt.%CaO alloys improved the oxidation resistance of AZ31 alloys.
Abstract
Magnesium alloys of AZ31 containing (0.5, 1, 1.5) wt.% of initially added CaO particles were cast in air, and their oxidation behavior was studied at 450-650oC in air. The initially added CaO particles either decomposed to dissolve in the α-Mg matrix or precipitated as Al2Ca along the grain boundaries of the matrix during casting. The ignition temperatures were 565.4oC for AZ31, 608.6oC for AZ31+0.5 wt.%CaO, and 689.7oC for AZ31+1 wt.%CaO. No ignition occurred for AZ31+1.5 wt.%CaO up to 700oC, displaying good oxidation resistance. The CaO-rich oxide scales that formed on the surface of the AZ31+(0.5, 1, 1.5) wt.%CaO alloys improved the oxidation resistance of AZ31 alloys.
참고문헌 (15)
- F. Czerwinski, "Magnesium Alloys-Design, Processing and Properties", pp.431~ (2011), InTech, Croatia
- F. Czerwinski, , JOM, 56(5), pp.29~ (2004)
- F. Czerwinski, , JOM, 64, pp.1477~ (2012)
- B. S. You, , Scripta Mater, 42, pp.1089~ (2000)
- B. H. Choi, , Met. Mater. Int, 9, pp.395~ (2003)
- B. S. You, , J. Kor. Inst. Met. & Mater, 39, pp.446~ (2001)
- 김희경, "Ca첨가 반응고 AZ31 마그네슘 합금의 재가열에 따른 미세조직 변화", 한국주조공학회지, 32(2), pp.75~80 (2012), 한국주조공학회[DOI]
- S. H. Ha, , Rare Metals, 25, pp.150~ (2006)
- S. K. Kim, , J. Mater. Process. Tech., 187-188, pp.757~ (2007)
- D. I. Jang, , Trans. Nonferr. Metal. Soc. China, 19, pp.s76~ (2009)
- J. K. Lee, , Trans. Nonferr. Metal. Soc. China, 21, pp.s23~ (2011)
- 송대현, "Mg-xAl-Zn 합금의 용탕유동성 및 기계적 특성", 대한금속·재료학회지, 44(5), pp.338~343 (2006), 대한금속·재료학회
- J. H. Kim, , Mater. Sci. Eng. A, 525, pp.18~ (2009)
- X. Feng, , J. Mater. Sci, 41, pp.4725~ (2006)
- H. Hu, , Defect Diffus. Forum, 312-315, pp.271~ (2011)