Publications
Detailed Information
Influence of Aging and Heat Treating on the Wettability of Stainless Steel Surface : 스테인리스강 표면 젖음성에 대한 에이징 및 열처리 영향
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 주종남 | - |
dc.contributor.author | 김두곤 | - |
dc.date.accessioned | 2018-05-28T16:08:01Z | - |
dc.date.available | 2018-05-28T16:08:01Z | - |
dc.date.issued | 2018-02 | - |
dc.identifier.other | 000000149810 | - |
dc.identifier.uri | https://hdl.handle.net/10371/140562 | - |
dc.description | 학위논문 (박사)-- 서울대학교 대학원 : 공과대학 기계항공공학부, 2018. 2. 주종남. | - |
dc.description.abstract | Wettability control of engineering metals such as steel, copper, aluminum and their alloys is one of the future-promising technologies to enhance functionality of the materials used in various fields such as automobile, building, ocean plant, military, aerospace, etc. While significant amount of research output has been reported in laboratory scale, commercialization of the technology is still stagnant due to several difficulties. One representative example is aging effect on the wettability of engineering metals, which refers to time-dependent wettability transition from hydrophilic to hydrophobic state. This makes it difficult to achieve superhydrophobic and superhydrophilic metal surfaces.
In this dissertation, influence of aging and heat treating on the wettability of stainless steel surface is studied. Aging effect is investigated on a flat AISI stainless steel 304 surface to understand the intrinsic wettability. The effect of oxygen is explained as a main cause for aging effect. Heat treating effect is investigated and revealed as a powerful process to tune the intrinsic wettability of stainless steel surface. Finally, wettability control without chemical coating is demonstrated for superhydrophobic and superhydrophilic stainless surfaces considering the effects of aging and heat treating. | - |
dc.description.tableofcontents | 1. Introduction 1
1.1 Research background 1 1.2 Research purpose 8 1.3 dissertation overview 9 2. Wettability 11 2.1 Surface free energy and surface tension 11 2.2 Wettability of flat solid surfaces 15 2.3 Wettability of rough solid surfaces 19 2.4 Metal surfaces in the perspective of wettability 26 3. Aging effect on the wettability of stainless steel 29 3.1 Experimental setup 32 3.2 Demonstration of aging effect 36 3.3 Influence of oxygen on aging effect 38 3.4 Superhydrophobic stainless steel surface utilizing aging effect 46 4. Heat treating effect on the wettability of stainless steel 48 4.1 Experimental setup 50 4.2 Influence of heat treating time 52 4.3 Influence of heat treating temperature 54 4.4 Wettability-tuned stainless steel surface by heat treating 57 4.5 Influence of phase transformation 70 4.6 Electrical property of heat-treated surfaces 72 5. Demonstration of fabricating superhydrophobic and superhydrophilic stainless steel surface 74 5.1 Experimental setup 77 5.2 Surface structuring by laser beam machining 82 5.3 Removal of recast layer by electrochemical etching 86 5.4 Superhydrophobic stainless steel surfaces 90 5.5 Superhydrophilic stainless steel surfaces 95 6. Conclusion 102 References 107 국문 초록 114 | - |
dc.format | application/pdf | - |
dc.format.extent | 6260985 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | metal | - |
dc.subject | stainless steel | - |
dc.subject | surface | - |
dc.subject | wettability | - |
dc.subject | heat treating | - |
dc.subject.ddc | 621 | - |
dc.title | Influence of Aging and Heat Treating on the Wettability of Stainless Steel Surface | - |
dc.title.alternative | 스테인리스강 표면 젖음성에 대한 에이징 및 열처리 영향 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Doogon Kim | - |
dc.description.degree | Doctor | - |
dc.contributor.affiliation | 공과대학 기계항공공학부 | - |
dc.date.awarded | 2018-02 | - |
- Appears in Collections:
- Files in This Item:
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.