With the increasing attention to environmental pollution caused by particulate matter globally, the automotive industry has also become increasingly interested in particulate matter, especially particulate matter generated by automobile brake systems. Here, we designed a coating composition and analyzed its mechanical properties to reduce particulate matter generated by brake systems during braking of vehicles. We designed a composition to check the mechanical properties change by adding Cr3C2 and YSZ to the WC-Ni-Cr composite composition. Based on the designed composition, coating samples were manufactured, and the coating properties were analyzed by Vickers hardness and ball-on-disk tests. As a result of the experiments, we found that the hardness and friction coefficient of the coating increased as the amount of Cr3C2 added decreased. Furthermore, we found that the hardness of the coating layer decreased when YSZ was added at 20vol%, but the friction coefficient was higher than the composition with Cr3C2 addition.

1. Introduction
2. Experimental
    2.1. HVOF 코팅 및 시편 전처리
    2.2. 마찰 및 마모 시험(Ball-on-disk)
    2.3. 코팅 시편 분석
3. Results and Discussion
    3.1. 상형성 분석 결과
    3.2. 미세 구조 분석 결과
    3.3. 경도 측정 결과
    3.4. 마찰계수 분석 결과
    3.5. 비마모량 측정 결과
    3.6. 마모면 분석 결과
4. Conclusion
Acknowledgement

• 박태준(한국세라믹기술원 이천분원, 엔지니어링소재센터) | Tae-Jun Park (Korea Institute of Ceramic Engineering and Technology, Engineering Ceramic Center, Icheon 17303, Republic of Korea)
• 이계원(한국세라믹기술원 이천분원, 엔지니어링소재센터) | Gye-Won Lee (Korea Institute of Ceramic Engineering and Technology, Engineering Ceramic Center, Icheon 17303, Republic of Korea)
• 오윤석(한국세라믹기술원 이천분원, 엔지니어링소재센터) | Yoon-Suk Oh (Korea Institute of Ceramic Engineering and Technology, Engineering Ceramic Center, Icheon 17303, Republic of Korea) Corresponding Author