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.

1. 서 론
 2. 실험 방법
  2.1 시험편 제작
  2.2 미세조직 관찰
  2.3 접합강도 측정
 3. 결과 및 고찰
  3.1 코팅층 미세조직
  3.2 코팅층 접합강도
  3.3 코팅층 파단형상
  3.4 코팅층 결합기구
 4. 결 론
 References

• 권의표(한국생산기술연구원 탄소경량소재응용그룹) | Eui-Pyo Kwon Corresponding author
• 김대영(한국생산기술연구원 탄소경량소재응용그룹, 전북대학교 금속공학과) | Dae-Young Kim
• 이종권((주)세원하드페이싱 제품개발부) | Jong-Kweon Lee