- 진공 플라즈마 스프레이 공정을 이용한 W계 복합 코팅층의 제조 및 특성 연구
- ㆍ 저자명
- 조진현,진영민,안지훈,이기안,Cho. Jin-Hyeon,Jin. Young-Min,Ahn. Jee-Hoon,Lee. Kee-Ahn
- ㆍ 간행물명
- 한국분말야금학회지
- ㆍ 권/호정보
- 2011년|18권 3호|pp.226-237 (12 pages)
- ㆍ 발행정보
- 한국분말야금학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
W-ZrC and W-HfC composite powders were fabricated by the Plasma Alloying & Spheroidization (PAS) method and the powders were sprayed into hybrid coating layers by using Low Vacuum Plasma Spray (LVPS) process, respectively. Microstructure, mechanical properties, and ablation characteristics of the fabricated coating layers were investigated. The LVPS process led to successful production of W-Carbide hybrid coatings, approximately 400 ${mu}M$ or above in thickness. As the substrate preheating temperature increased from $870^{circ}C$ to $917^{circ}C$, the hardness of the W-ZrC coating layer increased due to decreased porosity. Vickers hardness showed higher value (about 108.4 HV) in W-ZrC hybrid coating material compared to that of W-HfC while adhesive strength was found to be similar in both coating layers. The plasma torch test revealed good ablation resistance of the W-Carbide hybrid coating layers. The relatively high performance W-ZrC coating layer at the elevated temperature is thought to be attributed to both the strengthening effect of ZrC particle remained in the layer and the formation of ZrO2 phase with high temperature stability.