TiN/Ti 및 ZrN/Ti 다층막 코팅된 Ni-Ti파일의 표면거동
- Issued Date
- 2008
- Abstract
- 본 연구에서는 Ni-Ti 파일의 피로파절 수명을 개선하는 방법으로 파일의 표면에 RF-sputtering 방법으로 TiN/Ti 및 ZrN/Ti을 다층막으로 코팅한 후 코팅막의 표면특성과 파절거동을 조사한 결과 다음과 같은 결론을 얻었다.
1. Ni-Ti파일 표면에 코팅된 TiN/Ti 및 ZrN/Ti 다층막은 파절의 자리로 작용하는 기계가공 과정에서 발생한 균열, 미세 결함, 긁힌 자국 및 불균질성 자리를 최소화하였다.
2. 표면의 경도는 TiN/Ti 및 ZrN/Ti을 코팅한 경우가 코팅하지 않은 경우에 비하여 670으로 높은 값을 보였으며 다층막 코팅한 경우의 경도가 가장 높고 긁힘시험에서 좋은 접착성을 보였다.
3. 파절된 파일의 양상은 파일외부는 취성파절특성을 보이고 파일내부에서는 연성파절의 양상을 보였다. 파일의 상단부에서 하단부로 갈수록 연성파절의 특성이 현저하였다. TiN/Ti과 ZrN/Ti을 다층막으로 코팅한 파일의 경우는 벽계파절 영역이 감소된 양상을 보였다.
결론적으로 Ni-Ti파일의 피로파절을 개선할 수 있는 방법은 TiN/Ti 또는 ZrN/Ti을 다층막으로 표면에 코팅함으로써 파절균열의 핵생성과 성장이 이루어지는 기계가공 과정에서 발생한 균열, 미세 결함, 긁힌 자국 및 불균질성 자리를 최소화하여 피로파절을 방지할 수 있을 것으로 생각된다.|The purpose of this study was to investigate the surface behaviors of Ni-Ti file coated with TiN/Ti and ZrN/Ti multilayer. ProTaper(Maillfer, Dentsply, Ballaigues, Switzerland) files, F1 and F2 were used for the experiment.
In order to decrease the defects of Ni-Ti file surface, TiN/Ti and ZrN/Ti multilayer film coating were carried out on the Ni-Ti file surface using RF-sputtering, respectively. Pure Ti and Zr targets were used for TiN/Ti and ZrN/Ti film coating with high pure nitrogen gas. The surface defects of specimens were observed by field emission scanning electron microscope(FE-SEM) and energy dispersive x-ray spectroscopy(EDS) on the file surface. The hardness, adhesion and fracture surface of multilayer coated Ni-Ti file surface were observed with FE-SEM, EDS, vickers hardness tester, scratch tester and tensile tester.
The results were as follows:
1. TiN/Ti and ZrN/Ti coating on Ni-Ti file surface decreased the crack site for fatigue fracture and mechanical defects such as scratch created by machine.
2. The surface hardness of TiN/Ti and ZrN/Ti coated Ni-Ti file(670) was higher than that of non-coated Ni-Ti file(380). The TiN/Ti and ZrN/Ti coated Ni-Ti files showed higher adhesion than non-coated Ni-Ti file.
3. Fractured surface of Ni-Ti file showed the brittle fracture behavior at the exterior and ductile fracture behavior at the interior. The ductile fracture behavior appeared predominantly from exterior to interior of Ni-Ti file. The cleavage fracture region of TiN/Ti and ZrN/Ti coated Ni-Ti files decreased compared with non-coated Ni-Ti file.
It is considered that the TiN/Ti and ZrN/Ti multilayer film which would prevent Ni-Ti files from fatigue failure can be applicable to root canal instrument system act as inhibitor against crack nucleation and growth on Ni-Ti file surface due to decrease of mechanical defects.
- Alternative Title
- Surface Behaviors of Ni-Ti File Coated with TiN/Ti and ZrN/Ti Multilayer
- Alternative Author(s)
- Kang, Ho Min
- Affiliation
- 일반대학원 치의공학과
- Department
- 일반대학원 치의학
- Advisor
- 황호길
- Awarded Date
- 2009-02
- Table Of Contents
- 목 차
영문초록 ⅳ
Ⅰ. 서 론
Ⅱ. 연구재료 및 방법
Ⅲ. 연구성적
Ⅳ. 총괄 및 고안
V. 결 론
참고문헌
표 목 차
Table 1. The coating conditions of TiN/Ti and ZrN/Ti multilayer
................................................................................................................................
도 목 차
Fig. 1. Photographs of Ni-Ti files used in this study..............................................
Fig. 2. The schematic diagram of sputtering equipment........................................
Fig. 3. The schematic diagram of fracture test equipment....................................
Fig. 4. Photographs showing multilayer coated Ni-Ti files. (a) non-coated (b) Ti coated (c) TiN/Ti coated (d) ZrN/Ti coated..............................................................
Fig. 5. FE-SEM micrographs showing the non-coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000....................................................................................
Fig. 6. FE-SEM micrographs showing the Ti coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000...................................................................................
Fig. 7. EDS peaks showing the non-coated and Ti coated Ni-Ti file surface.
(a) non coated (b) Ti coated ............................................................................
Fig. 8. FE-SEM micrographs showing the TiN coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000...................................................................................
Fig. 9. FE-SEM micrographs showing the ZrN coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000....................................................................................
Fig. 10. EDS peaks showing the TiN coated and ZrN coated Ni-Ti file surface. (a) TiN coated (b) ZrN coated............................................................
Fig. 11. FE-SEM micrographs showing the TiN/Ti coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000...........................................................................
Fig. 12. FE-SEM micrographs showing the ZrN/Ti coated Ni-Ti file surface. (a) X 200, (b) X 1000, (c) X 10000...........................................................................
Fig. 13. EDS peaks showing the TiN coated and ZrN coated Ni-Ti file surface. (a) TiN/Ti coated (b) ZrN/Ti coated..............................................
Fig. 14. Optical micrographs showing hardness trace of non-coated and multilayer coated Ni-Ti file surface after micro-vickers hardness test. (a) non-coated (b) Ti coated (c) TiN coated (d) ZrN coated (e) TiN/Ti coated (f) ZrN/Ti coated............................................................................................................................
Fig. 15. Micro-vickers hardness of non-coated and multilayer coated Ni-Ti file surface........................................................................................................................................
Fig. 16. SEM showing the scratch trace of non-coated and Ti coated Ni-Ti file after scratch test. (a) non-coated (X 300) (b) non-coated (X 500) (c) Ti coated (X 1000) (d) Ti coated (X 5000)..............................................................................
Fig. 17. SEM showing the scratch trace of TiN coated and ZrN coated Ni-Ti file after scratch test. (a) TiN coated (X 500) (b) TiN coated (X 1000) (c) ZrN coated (X 500) (d) ZrN coated (X 1000)............................................................................
Fig. 18. SEM showing the scratch trace of TiN/Ti coated and ZrN/Ti coated Ni-Ti file after scratch test. (a) TiN/Ti coated (X 500) (b) TiN/Ti coated (X 1000) (c) ZrN/Ti coated (X 2000) (d) ZrN/Ti coated (X 5000)...................................
Fig. 19. FE-SEM showing fractured non-coated and Ti coated Ni-Ti file after fracture test. (a) non-coated (X 500) (b) non-coated (X 10000) (c) Ti coated (X 1000) (d) Ti coated (X 2000)...........................................................................................
Fig. 20. FE-SEM showing fractured TiN coated and ZrN coated Ni-Ti file after fracture test. (a) TiN coated (X 1000) (b) TiN coated (X 5000) (c) ZrN coated (X 5000) (d) ZrN coated (X 5000)...........................................................................
Fig. 21. FE-SEM showing fractured TiN/Ti coated and ZrN/Ti coated Ni-Ti file after fracture test. (a) TiN/Ti coated (X 1000) (b) TiN/Ti coated (X 5000) (c) ZrN/Ti coated (X 1000) (d) ZrN/Ti coated (X 5000)..............................................
- Degree
- Doctor
- Publisher
- 조선대학교 대학원
- Citation
- 강호민. (2008). TiN/Ti 및 ZrN/Ti 다층막 코팅된 Ni-Ti파일의 표면거동.
- Type
- Dissertation
- URI
- https://oak.chosun.ac.kr/handle/2020.oak/7428
http://chosun.dcollection.net/common/orgView/200000237412
- Appears in Collections:
- General Graduate School > 4. Theses(Ph.D)
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