초록 ▼

1. 나노구조 용사코팅분말의 공정개발 및 첨단 고상윤활코팅의 원천기술 개발 (RIST, 황순영)
$\blacksquare$ 상용화를 위한 Pilot Plant 스케일의 초경분말 대량 생산기술 개발 (100 kg 제조)
$\blacksquare$ 상용화를 위한 Pilot Plant 스케일의 고상윤활분말 대량 생산기술 개발 (80 kg제조)
$\blacksquare$ 신물질을 이용한 나노 고상윤활분말 제조 및 코팅기술 개발
- BMG Ni+$Cr_

1. 나노구조 용사코팅분말의 공정개발 및 첨단 고상윤활코팅의 원천기술 개발 (RIST, 황순영)
$\blacksquare$ 상용화를 위한 Pilot Plant 스케일의 초경분말 대량 생산기술 개발 (100 kg 제조)
$\blacksquare$ 상용화를 위한 Pilot Plant 스케일의 고상윤활분말 대량 생산기술 개발 (80 kg제조)
$\blacksquare$ 신물질을 이용한 나노 고상윤활분말 제조 및 코팅기술 개발
- BMG Ni+$Cr_2O_3$분말+Ag분말+$BaF_2/CaF_2$분말 및 BMG Ni+$Cr_2O_3$분말
$\blacksquare$ 2단계 목표치를 상회하는 나노구조 초경코팅 내마모성 확보
$\blacksquare$ 실제품 스케일의 Rig Test 시험을 통한 우수한 마찰/마모 특성 검증
- 마찰/마모 특성에서 1단계 대비 월등한 특성 결과를 얻음
- 1000 cycle 목표대비 5000 cycle 통과
$\blacksquare$ Theta Gun Spray 장치를 이용한 Slurry 분말의 코팅기술 기초연구
$\blacksquare$ 나노 초경분말 코팅기술의 산업화를 위하여 Mechanical Seal 및 Cylinder rod 등에 적용 수명평가
$\blacksquare$ 나노 고상윤활 코팅기술은 산업화를 위하여 Air Foil Bearing등에 적용 수명평가
$\blacksquare$ 나노 고상윤활 코팅 기술 및 나노 초경분말 코팅 기술은 참여기업인 서머텍코리아에 기술이전 진행
2. 나노구조 내식코팅 기술 개랄(KIST, 석현광)
$\blacksquare$ 용사코팅용 Fe계, Ni계 내식성 비정질/나노구조 분말제조 기술 확보(용량 3Kg/charge)
$\blacksquare$ Al, Y, O, N, C, B, Zr등 다양한 원소의 조합에 의해 나노/비정질 구조를 갖는 다수의 새로운 NanoWin 코팅 제조 기술 확보
$\blacksquare$ 금속 및 비금속 원소로 이루어진 신소재의 나노/비정질화에 대한 이론적 규명
$\blacksquare$ 기존 상용 소재에 비해 F기 부식성 가스 분위기에서의 부식 저항성 5배 -10배 향상 신소재 나노구조 코팅 개발
$\blacksquare$ 나노/비정질 구조 신물질의 반도체 장비 부품 적용 현장 기술 확보
$\blacksquare$ 참여 기업(윈엔윈 테크놀로지(주))로의 기술 이전(2006년 9월, 참여 기업의 명칭 변경(윈엔윈 테크놀로지(주)$\rightarrow$ 나노윈(주))
$\blacksquare$ 참여기업에서의 현장 생산 라인 구축 완료(2006년 12월), 시제품 생산(2007년-2008년), 최종 수요 기업 생산 라인에서의 현장 성능 평가(2008년 현재)

Abstract ▼

This study is focused on two parts such as a development of a development of WC-based nano-structured coatings and a development of nano-structured solid lubricant coatings for air foil bearings. A pilot scale experiments up to 100 kg for WC-based nano-structured powders are performed for formation

This study is focused on two parts such as a development of a development of WC-based nano-structured coatings and a development of nano-structured solid lubricant coatings for air foil bearings. A pilot scale experiments up to 100 kg for WC-based nano-structured powders are performed for formation of nano-structured feedstock. The control of porosity and shape of the feedstock powders were important factors to control. The results of wear resistance measured by a scratch test shows that the wear resistance has been increased up to 170% by a simulated sand abrasion test.
On the other hand, a foil air bearing system is adopted for the air cycle machine in the turbomachinery. However, the collision and the friction between foil air bearing and journal shaft make energy loss and mass loss before the steady-state condition is achieved especially for the start period and the stop period in a cycle. In order to improve tribological properties, a nano-structured composite coating and the newly designed BMG-$Cr_2O_3$-Ag-$BaF_2/CaF_2$ coatings was deposited by atmospheric plasma spraying, and then compared with a PS304 coating and BMG-$Cr_2O_3$ coating in view of the wear properties. The tribological behavior of the nanostructured composite coating and BMG base blended coatings was evaluated by a rig test which simulated real service conditions in the turbo-machinery components and tests were conducted at both room temperature and high temperature $350^{\circ}C$. The results showed that, the PS304 coatings showed a non-uniform microstructure due to the difference in the physical and thermophysical properties of the components which lead to deterioration of the mechanical and tribological properties of the coatings. The friction coefficient was strongly dependant on the content and uniformity of Ag in the coating. The BMG-$Cr_2O_3$-Ag-$BaF_2/CaF_2$ coating had a considerably lower friction and excellent wear resistance at both a room temperature and a high temperature due to tribofilm of solid lubricants. However, the friction current of the BMG-$Cr_2O_3$ was slightly higher due to the crystalline phase formed on the worn surface during sliding friction. As the testing temperature increased, the worn surface of the BMG-$Cr_2O_3$ displayed a plastic deformation and formed crystallized layer indicating that the wearing temperature at the sliding interface leaded to a higher temperature than the glass-crystal transition temperature (Tx).

목차 Contents

• chapter 1. Overview of research subject...14
• chapter 2. State of the art of technology...16
• chapter 3. Research progress and results...19
• chapter 4. Evaluation of research results and contribution to related field...96
• chapter 5. Application plan of research and development result...104
• chapter 6. Information...105
• chapter 7. References...106