서스펜션 플라즈마 용사로 제조된 란타눔/가돌리늄 지르코네이트 열차폐코팅의 구조와 열전도도 특성
Structure and Thermal Conductivity of Thermal Barrier Coatings in Lanthanum/Gadolinium Zirconate System Fabricated via Suspension Plasma Spray
1
조회
0
다운로드
6
인용
0
참고문헌
키워드
초록
With increase in demand for higher operating temperatures of gas turbines, extensive research efforts have been carried out to enhance the performance of thermal barrier coatings (TBCs) in the field of coating processing as well as materials. In this study, thermal barrier coatings in lanthanum/gadolinium zirconate system, which is one of the most promising candidates for replacing yttira-stabilized zirconia (YSZ) in thermal barrier coating applications, are fabricated via suspension plasma spray. Dense, 300 ~ 400 μm thick coatings of fluoritephase zirconate with modest amount of segmented microstructures are obtained by using suspension plasma spray with suspensions of planetary-milled mixture between lanthanum and/or gadolinium oxide and nano zirconia. These coatings exhibit thermal conductivities of 1.6 ~ 1.7 W/mK at 1000oC, which is relatively lower than that of YSZ.
Abstract
With increase in demand for higher operating temperatures of gas turbines, extensive research efforts have been carried out to enhance the performance of thermal barrier coatings (TBCs) in the field of coating processing as well as materials. In this study, thermal barrier coatings in lanthanum/gadolinium zirconate system, which is one of the most promising candidates for replacing yttira-stabilized zirconia (YSZ) in thermal barrier coating applications, are fabricated via suspension plasma spray. Dense, 300 ~ 400 μm thick coatings of fluoritephase zirconate with modest amount of segmented microstructures are obtained by using suspension plasma spray with suspensions of planetary-milled mixture between lanthanum and/or gadolinium oxide and nano zirconia. These coatings exhibit thermal conductivities of 1.6 ~ 1.7 W/mK at 1000oC, which is relatively lower than that of YSZ.
참고문헌 (25)
- N. P. Padture, , Science, 296, pp.280~ (2002)
- R. Vaßen, , Surf. Coat. Technol, 205, pp.938~ (2010)
- D. R. Clarke, , MRS Bull, 37, pp.891~ (2012)
- C. G. Levi, , Curr. Opi. in Solid State and Mater. Sci, 8, pp.77~ (2004)
- R. Vassen, , J. Am. Ceram. Soc, 83, pp.2023~ (2000)
- W. Pan, , MRS Bull, 37, pp.917~ (2012)
- X. Q. Cao, , J. Euro. Ceram. Soc, 24, pp.1~ (2004)
- J. Wu, , J. Am. Ceram. Soc, 85, pp.3031~ (2002)
- C. Wang, , J. Mater. Sci, 47, pp.4392~ (2012)
- J. W. Fergus, , Metall. Mater. Trans. E, 1 (2014)
- 이원준, "플라즈마 용사법으로 제작된 4mol% Y2O3-ZrO2열차폐코팅의 화산재에 의한 고온열화거동", 한국세라믹학회지, 50(6), pp.353~358 (2013), 한국세라믹학회
- A. R. Evans, , Acta Mater, 48, pp.3963~ (2000)
- S. K. H. Guo, , J. Am. Ceram. Soc, 89, pp.1432~ (2006)
- 양영환, "플라즈마 용사 및 전자빔 물리기상 증착법으로 제조된 4YSZ 코팅의고온마찰마모 거동", 한국표면공학회지, 46(6), pp.258~263 (2013), 한국표면공학회
- K. VanEvery, , J. Therm. Spray Technol, 20, pp.817~ (2011)
- A. Guignard, , J. Therm. Spray Technol, 21, pp.416~ (2012)
- H. Kassner, , J. Therm. Spray Technol, 17, pp.115~ (2007)
- 이원준, "서스펜션 플라즈마 용사를 이용한 이트리아 안정화 지르코니아(7.5 wt% Y2O3-ZrO2) 코팅 증착 및 특성", 한국분말야금학회지, 20(6), pp.445~452 (2013), 한국분말야금학회
- 이원준, "서스펜션 플라즈마 용사법을 이용한 7.5 wt% Y2O3-ZrO2 열차폐코팅 제조 및 평가", 한국세라믹학회지, 51(6), pp.598~604 (2014), 한국세라믹학회[DOI]
- 권창섭, "유성구볼밀을 이용한 La2O3-Gd2O3-ZrO2 계 서스펜션준비와서스펜션 플라즈마용사를 이용한 (La1-xGdx)2Zr2O7 코팅증착과 특성", 한국분말야금학회지, 20(6), pp.453~459 (2013), 한국분말야금학회
- D. Michel, , J. Raman Spectro, 5, pp.163~ (1976)
- R. Leckie, , Acta Mater, 53, pp.3281~ (2005)
- C. Delbos, , Plasma Chem. Plasma Proces, 26, pp.393~ (2006)
- C. Wan, , Phys. Rev. B, 74, pp.144109~ (2006)
- H. Lehmann, , J. Am. Ceram. Soc, 86, pp.1338~ (2003)