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추현식 조선대학교 생산기술연구소 2005 生産技術硏究 Vol.27 No.1
For the surface modification of ceramic board. IAR(Ion Assisted Reaction was introduced to pre-treatment the ceramic surface. The adhesion strength of electro less Cu and electro Cu plating layer accompanied by IAR treatment of ceramic shows 150gf/㎠ which is three times higher than that without the IAR treatment. The wettability and adhesion strength between ceramic and Cu plating layer increased as the irradiation quantity of N₂ increased in the IAR treatment. The adhesion strength significantly increased to 450gf/cm after formation of Cr seed.
WO₃분말로 부터 WC를 제조 할 때 탄소량의 변화에 관한 연구
秋現植 조선대학교 생산기술연구소 1980 生産技術硏究 Vol.1980 No.-
This paper is attempted to study on the variation of carbon in the productive process of we from WO₃. In order to test the variational process of carbon, furnace were used a nitrogen atmosphere and a hydrogen atmosphere. Putting a mixture of WO₃and C into the furnaces and heating them. The result was producted WC of good quabity. Heating the testing materials, a mixture of carbon content was changed from 1150℃ to 1650℃ in the nitrogen furnace and especially decreased at 1600℃ in the hydrogen furnace. The severe control of the carbon content of the product was possible by this two-step carburization method.
製鐵 製鋼用 耐火brick에 關한 硏究 : 使用上 材料選擇을 中心으로
秋現植 朝鮮大學校 工科大學 1972 論文集 Vol.1 No.-
Refactory materils are indispensable to furnaces as well as furnaces are indispensable to metallurgy , It is very important to select proper refractory materials which are necessary to furnaces & their accessary equipments for producing steel-goods from iron ores. In this thesis 1 first of all considered merits and defects of refraerials materials on the way of present use and then studied furnace materials proper to that, expeeting that furnace smelting operation is much changed in future. I think it is nelessary to study the choice & manufacture of furnace materiais which sujt best to smelting operations.
Stainless steel powder에 依한 燒結體 製造에 關한 硏究
秋現植 조선대학교 생산기술연구소 1978 生産技術硏究 Vol.1978 No.-
The generation of grain size was investigated by sintering after Compression-Forming of 12-Chrome Stainless Steel powder. And by Sintering the Compacts of Cr-Ni Stainless Steel powder, the relationbetween sintering temp. and density was also investigated. The results abtained are summarized as follows : 1) When powder grains contained much Oxygen, growth speed was low but shrinkage was big. 2) In case of powder of high oxygen content, many micro porosities as well as porositios were distributed among the inside of grain and grain boundary. 3) In the temperature range of 1320 to 1380℃, density was decreased because of grain growth. 4) In the temperature range of 1380 to 1420℃ density was increased because of approacking to M.P.
秋現植 조선대학교 생산기술연구소 1992 生産技術硏究 Vol.14 No.2
Crack-Free hard chrome deposits of about HR_(60) was investigated through the experiment of current efficiency, hardness, corrosion test, surface morphology observation and X-ray diffraction analysis. The results obtained are summarized as follows; 1) Cathode current efficiency was increased with raising bath temperature. 2) In type-II solution at 60A/dm², chrome deposits showed crack-free surfaces and the highest Hv 900 values. 3) In the corrosion test with type-II solution, chrome deposits showed the best results. 4) The effect of type-II additives on leveling, brightness and crack-free properties of hard chrome deposits appeared most valuable through SEM micrographs. 5. X-ray diffracted single peak was showed after heat treatment at 400℃ and 800℃ of hard chrome deposits.
도시 지역 거주 노인의 연령집단별 삶의 만족감에 영향을 미치는 가족 요인과 지역사회 요인: 사회적 자본의 중요성을 중심으로
추현식,이한이 한국지역사회간호학회 2022 지역사회간호학회지 Vol.33 No.2
Purpose: The aim of this study was to identify differences and influencing factors in the level of life satisfaction among the urban community-dwelling elderly by age group. Methods: The study was conducted utilizing the secondary data of 2017 Seoul Survey in a cross-sectional design. Of 42,688 participants in total, the data of 7,927 adults aged 65 or older were analyzed. The data were analyzed using descriptive statistics, independent t-test, chi-square test, Pearson’s correlation coefficients, and multiple linear regression. Results: There were significant differences between age groups, and it was found that the old elderly groups had significantly higher life satisfaction than the oldest elderly group (t=8.37, p<.011). In common, family and community factors influencing life satisfaction in the two age groups were companion animals (old elderly: β=.03, p=.002; oldest elderly: β=.06, p=.021), social network (old elderly: β=.10, p<.001; oldest elderly: β=.08, p=.008), and social support (old elderly: β=.05, p<.001; oldest elderly: β=.08, p=.005). Conclusion: Based on these results, social welfare and nursing care services focusing on social capital and age group-specific interventions are needed to improve life satisfaction of the elderly. This study might provide the possibility and evidence for a program to improve life satisfaction for the urban community-dwelling elderly, including social capital elements.
금속과 세라믹기판의 접착력에 미치는 초음파 교반의 영향에 관한 연구
추현식,류일광 조선대학교 생산기술연구소 1998 生産技術硏究 Vol.20 No.2
Recently, ceramic substrate is selected for an alternative substrate board for high-speed circuits due to its low-thermal expansion. Generally, metallization of ceramic substrate is fabricated by electroless copper plating. But it has been troubled for its weak adhesion strength between the ceramic board and copper layers. To enhance adhesion strength, we have studied effects of ultrasonic agitation for adhesion strength between metal and ceramic boards. In catalyst treatment, high density Pd nuclei of small size were formed during ultrasonic agitation compared that of no stirring. In this case, the adhesion strength was enhanced about 20% by using ultrasonic agitation.