Ni 본드코팅이 Al 기지에 고온 용사 코팅된 Fe 코팅층의 접합특성에 미치는 영향

권의표; 김대영; 이종권; Eui-Pyo Kwon; Dae-Young Kim; Jong-Kweon Lee

Korean Journal of Materials Research, Vol.26, No.10, 542-548, October, 2016

DOI10.3740/MRSK.2016.26.10.542 Export Citation

Ni 본드코팅이 Al 기지에 고온 용사 코팅된 Fe 코팅층의 접합특성에 미치는 영향

Effect of Ni Bond Coat on Adhesive Properties of Fe Coating Thermal Sprayed on Al Substrate

권의표^{1, †}, 김대영^{1, 2}, 이종권³

¹한국생산기술연구원 탄소경량소재응용그룹
²전북대학교 금속공학과
³(주)세원하드페이싱 제품개발부

Eui-Pyo Kwon^{1, †}, Dae-Young Kim^{1, 2}, and Jong-Kweon Lee³

¹Carbon & Light Materials Application R&D Group, Korea Institute of Industrial Technology, Jeonju 54853, Republic of Korea
²Department of Metallurgical Engineering, Chonbuk National University, Jeonju 54896, Republic of Korea
³Product development division, Sewon Hardfacing Co., Ltd., Jeonju 54854, Republic of Korea

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The influence of NiCrAlY bond coating on the adhesion properties of an Fe thermal coating sprayed on an Al substrate was investigated. By applying a bond coat, an adhesion strength of 21MPa was obtained, which was higher than the 15.5MPa strength of the coating without the bond coat. Formation of cracks at the interface of the bond coat and the Al substrate was suppressed by applying the bond coat. Microstructural analysis of the coating interface using EBSD and TEM indicated that the dominant bonding mechanism was mechanical interlocking. Mechanical interlocking without crack defects in the coating interface may improve the adhesion strength of the coating. In conclusion, the use of an NiCrAlY bond coat is an effective method of improving the adhesion properties of thermal sprayed Fe coatings on Al substrates.

Keywords:Ni bond coat;thermal spray;adhesive strength;coating layer;microstructure

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[2] Gu L, Fan X, Zhao Y, Zou B, Wang Y, Zhao S, Cao X, Surf. Coat. Technol., 206, 4403 (2012)

[3] Park JS, Lee HR, Lee BH, Park JS, Korean J. Mater. Res., 25(5), 226 (2015)

[4] Kim HS, Kim BH, Suhr DS, Korean J. Mater. Res., 9, 73 (1999)

[5] Ku S, Kim GM, Korean J. Mater. Res., 15(6), 375 (2005)

[6] Ghadami F, Sohi MH, Ghadami S, Surf. Coat. Technol., 261, 289 (2015)

[7] Haynes JA, Ferber MK, Porter WD, J. Therm. Spray Technol., 9, 38 (2000)

[8] Yang YH, Park CY, Lee WJ, Kim SJ, Lee SM, Kim SW, Kim HT, Oh YS, J. Korean Inst. Surf. Eng., 46, 258 (2013)

[9] Li HQ, Wang QM, Jiang SM, Ma J, Gong J, Sun C, Corrosion Sci., 53, 1097 (2011)

[10] Agilent Technology, Agilent Laser and Optics User’s Manual Volume 1, Material Expansion Coefficients, 5th ed., p.280, California, USA (2007).

[11] Berndt CC, J. Mater. Eng., 12, 151 (1990)

[12] Dorfman M, Adv. Mater. Process, 160, 47 (2002)

[13] Trompetter WJ, Hyland M, Munroe P, Markwitz A, J. Therm. Spray Technol., 14, 524 (2005)

[14] Kitahara S, Hasui A, J. Vac. Sci. Technol., 11, 747 (1974)