http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
Effects of gas formers of MgCO3, CaCO3 and Li2CO3 on the spattering phenomena was investigated for non-shielded flux cored arc welding. Spattering Phenomena were pictured using high speed camera at a 3000 frames per sec. As experimental results, spattering modes were classified into 4 types. The modes were spattering by arc force, gas explosion short circuit and pore escape. The amount of spatters by arc force was 30%, gas blowing force was 40%, short circuit 10%, Pore escape was 10% and others were 10%. When Li2CO3 was added, the amount of spatters was largest and it decreased in the order of CaCO3 and MgCO3.
This paper presents a brief summary on a relatively new plasma aided electrolytic surface treatmentprocess for light metals. A brief discussion regarding the advantages, principle, process parameters andapplications of this process is discussed. The process owes its origin to Sluginov who discovered an arcdischarge phenomenon in electrolysis in 1880. A similar process was studied and developed by Markovand coworkers in 1970s who successfully deposited an oxide film on aluminium. Several investigationthereafter lead to the establishment of suitable process parameters for deposition of a crystalline oxide filmof more than 100μm thickness on the surface of light metals such as aluminium, titanium and magnesium. This process nowadays goes by several names such as plasma electrolytic oxidation (PEO), micro-arcoxidation (MOA), anodic spark deposition (ASD) etc. Several startups and surface treatment companieshave taken up the process and deployed it successfully in a range of products, from military grade riflesto common off road sprockets. However, there are certain limitations to this technology such as theformation of an outer porous oxide layer, especially in case of magnesium which displays a PilingBedworth ratio of less than one and thus an inherent non protective oxide. This can be treated further butadds to the cost of the process. Overall, it can be said the PEO process offers a better solution than theconventional coating processes. It offers advantages considering the fact that he electrolyte used in PEOprocess is environmental friendly and the temperature control is not as strict as in case of other surfacetreatment processes.