한국표면공학회지 (31권2호 81-90)
A Study on the Fatigue behavior of Plasma Sprayed Coating Layer and Fatigue Life Variation of Steel
플라즈마 용사층의 피로거동 및 강의 피로수명 변화에 관한 연구
박만호;한주철;정철;송요승;노병호;이구현;
Park, M. H.;Han, J. C.;Jung, C.;Song, Y. S.;Lo, B. H.;Lee, K. H.;
한국항공대학교 항공재료공학과;한국기계연구원;
Hankuk Aviation University Dept. Materials Engineering;Korea Institute of Machinery & Materials;
NiCrAly/YSZ(8wt% Y2O3-Zro2) functionally fraded thermal barrier coating (FGC) layers on a Co-base sureralloy (HAYNESS 188) substrate were fabricated using Ar shielded single torch air plasma spraying method. Functional grading were produced with the stepwise compositional change throughout layer thinkness. Microstructural observation revealed a sucessful fabrication of NiCrAly/YSZ FGC. From the results of the curvature measurement, adhesive stength measurement and thermal shock test for the FGC, it was concluded that the optimum enhance of functionally graded coating layer thinkcess and compositional pattern exit to enhance the properties of FGC, which is closely reated to the internal residual distribution with it.
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