• 한국기계가공학회지
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• 제13권6호
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• pp.54-60
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• 2014

In industry, several casting process are widely used to manufacture complex and accurate blank part of hard materials such as aluminum, casting steels, bronze and magnesium alloys which are difficult to manufacture in a blank shape. Even if the casting process does not high accuracy superior surface characteristics other machining process, the casting process is widely used in manufacturing blank part. Furthermore, it is difficult to select appropriate casting process a part among several casting process. for effective selection different process, a careful decision given casting application is necessary. An appropriate casting for a given material and shape condition must be selected for novice engineers in industry. In this paper, an expert system based on an analytic network process(ANP) is suggested for best selection of casting considering a prior interdependency effect among various factors such as material, geometry, process capability, economy and equipment.

• 복식
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• 제45권
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• pp.161-178
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• 1999

In contemporary fashion metal have used which is as the material with a sufficient potentiality of expression which is displayed by an unique characteristic involved only in metal. In this paper metal expressed in contemporary fashion is researched. The first thing the formative characteristic of metal is researched under the consideration of type technique and color of metal used in contemporary fashion. Metals such as gold silver bronze aluminum thin lead and iron are usually used in fashion and those metals are used in various types such a thread fabric board leaf a and cable. Those types of metal as above are applied to the clothing by the techniques of weaving embroidering metal leaf printing or moulding which gives the formative characteristic to the clothing. In color metal has an effect on the colors of surroundings by its smooth and unique luster and its effect of reflection and produces the visual formative characteristic through the effects of contrast. The esthetic will of metal expressed in modern fashion is researched in this study under the facts studied as above. first metal expresses the future oriented esthetic Second metal has the characteristic of attracting the attention Third metal is used as valid techniques to express the artistic formation for clothing escaping from the idea that the clothing is only for wearing. Finally metal is used as an anti-cultural tool of fighting against the existing order or spirit.

• 수산해양교육연구
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• 제19권1호
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• pp.129-136
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• 2007

The component parts of the shell plate of a ship are steel. but the screw propeller or the bow thruster is a compound of bronze, nickel and aluminum. On account of the these different components between metals of the shell plate, the screw propeller and the bow thruster, which are underwater, the shell plate of a ship is corroded by the action of ionization. Authors investigated the corrosion loss of the zinc anodes which were attached to the bottom shell of the training ship Kaya for about two years. The obtained results were as follows:1. In case of the shell plate the difference of the corrosion loss according to port and starboard was almost nothing. But the corrosion loss of the forward part was more than that of the aftward part.2. There was little difference in the corrosion loss between the forward and the aftward part on the bilge keel.3. The corrosion loss of the fore, midship and aft part on the false keel were 24.7%, 22.4% and 23.9% respectively.4. The corrosion loss of the fore and the aft part on the false keel was more than that of the midship part.5. The corrosion loss of the bow thruster was greater than any other parts.6. The nearer the zinc anode to the screw propeller the more the corrosion loss on the stern frame, and the situation was also same as on the rudder.

• 박물관보존과학
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• 제30권
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• pp.23-46
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• 2023

동아대학교 석당박물관 소장 지자총통은 조선 중기에 사용하던 전장유통식 중화기무기로 천자총통 다음으로 큰 화기류이다. 지자총통의 표면에는 표면 이물질들로 인해 고유의 색상이 가려져 있는 상태로, 보존처리가 필요한 상황으로 판단되었다. 안정적인 보존처리를 위해 감마선(γ선), X선 비파괴 투과조사, 내시경카메라 관찰을 실시하여 내부 구조와 보존상태를 파악하였고, p-XRF 성분분석, SEM-EDS 성분분석, XRD 분석 등을 활용하여 지자총통의 재질 성분과 표면 오염물 등에 관한 성분분석을 진행하였다. 휴대용현미경 관찰과 정밀 3D스캔으로 지자총통 표면 명문의 상태, 새김형태 등을 확인하였다. 감마선, X선 비파괴 투과조사 결과, 지자총통 내부에 다량의 기포가 관찰되었으며, 육안관찰로 확인되는 표면의 채플릿은 비파괴투과조사 결과로는 확인되지 않았다. p-XRF 성분분석 결과 지자총통은 구리(Cu), 주석(Sn), 납(Pb) 합금으로 만들어진 청동으로 확인되었으며, SEM-EDS를 활용한 표면 이물질 성분분석 결과, 백색이물질은 칼슘(Ca), 황(S), 티타늄(Ti)이 주성분으로 확인되었다. 티타늄은 백색수정액의 주성분인 이산화티타늄(TiO₂)으로 추정되었으며, 적색이물질은 바륨(Ba)이 주성분으로 확인되어 페인트의 체질안료인 황산바륨(BaSO₄)으로 추정되었다. 티타늄과 바륨을 주성분으로 하는 백색과 적색 오염물은 근래에 이르러 표면에 묻은 것으로 추정된다. 황색이물질은 알루미늄(Al), 규소(Si)로 확인되어 토양성분에서 유래한 것으로 추정했다. 백색이물질의 XRD 성분분석결과 황화칼슘(CaS)으로 확인되었고, SEM-EDS와 XRD 성분분석결과로 백색이물질은 석고(CaS)로 확인하였다. 성분분석의 결과를 토대로 표면 이물질 제거, 안정화처리, 강화처리를 진행하였다. 보존처리를 진행하던 중에 휴대용 현미경과 정밀 3D스캔을 통해 알려지지 않았던 명문 우(右), 병(兵), 상(上), 이(二)를 발견하였다. 또한, 명문의 새김방법과 깊이, 너비 등을 측정하였다. 우병상(右兵上)은 창원 합포성 내 위쪽이며, 이(二)는 두 번째 돈대로 파악할 수 있다.