강 기판위에 아크이온 플레이팅된 CrN박막의 산화

이동복,이영찬,Lee, Dong-Bok,Lee, Yeong-Chan 한국재료학회 2001 한국재료학회지 Vol.11 No.4

아크이온 플레이팅 장치를 이용하여 STD61강 기판 위에 이온질화 전처리를 행하거나 하지 않은 후, CrN 박막을 증착하고, 대기중 $700~900^{\circ}C$의 온도에서 40시간동안 이들에 대한 산화거동을 연구하였다. 산화거동은 열중량분석기, X선회절기, EDS, SEM을 이용하여 조사하였다. 증착된 CrN박막은 CrN과 $Cr_2$N의 두 상으로 구성되어 있었다. CrN박막은 보호적 $Cr_2$O$_3$층을 형성하여 기판을 산화로부터 보호하였다. 이온질화처리는 CrN박막의 내산화성에 영향을 주지 않았다. CrN films were deposited onto STD61 steel substrates using an arc-ion plating apparatus, with and without ion-nitriding pretreatment, and their oxidation was studied between 700 and $900^{\circ}C$ for 40hr in air. The oxidation behavior was examined by thermogravimetric analyses, X-ray diffraction. EDS and SEM. The deposited CrN films consisted of CrN and $Cr_2$N phases. The CrN films increased the oxidation resistance of the substrate by forming a protective $Cr_2$$O_3$ layer. The ion-nitriding pretreatment has not affected the oxidation resistance of the CrN film.

Ni-Aluminide 금속간 화합물의 확산과 고온산화 특성

이동복,정승부 ( Dong Bok Lee,Seung Boo Jung ) 대한금속재료학회 1997 大韓金屬學會會報 Vol.10 No.1

강 기판위에 이온 플레이팅된 TiCrN 박막의 산화기구

이동복,김기영,Lee, Dong-Bok,Kim, Gi-Young 한국재료학회 2003 한국재료학회지 Vol.13 No.7

Coatings of TiCrN ion-plated on a steel substrate was oxidized at $800^{\circ}C$ in air, and their oxidation mechanism was presented. During oxidation, substrate elements and Ti and Cr in the coating always diffused outwardly to form the oxide scale. Simultaneously, oxygen from the atmosphere diffused inward1y to react with Ti and Cr to form $TiO_2$and $Cr_2$$O_3$, respectively. Also, the counter-diffusion of cations and oxygen resulted in some oxygen dissolution in the unoxidized TiCrN coating, and Fe dissolution in the oxide scale. When the Ti content in the coating was high, the $TiO_2$-forming tendency was strong, while when the Cr content was high, the $Cr_2$$O_3$-forming tendency was strong.

金初 女眞社會의 構成

李東馥(Lee Dong-bok) 역사학회 1985 역사학보 Vol.106 No.-

近世 Ⅰ

李東馥(Lee Dong-bok) 역사학회 1985 역사학보 Vol.108 No.-

자유민주주의의 위기

이동복(李東馥)(LEE Dong Bok) 신아시아연구소(구 신아세아질서연구회) 2013 신아세아 Vol.20 No.3

The Attempted insurgency plot allegedly masterminded by United Progressive Party (UPP) member of the National Assembly Lee Seok Ki and his ragtag group of self-styled left-leaning, pro-North Korean “revolutionary activists” provide us with two sober reminders: First, 65 years after the division of the country, North Korea is still busy engaged in the planting of the seeds of a revolutionary take-over of South Korea as part of its un-ending pursuit of a unification achieved on its own terms. Second, obviously hardly recognized by themselves, the bulk of South Koreans are forget-minded about the reality that the liberal democracy that has led South Korea on its path toward the prosperity and political freedom of today is pregnant with the built-in weakness that can undermine itself internally by means of democracy itself. It is by no means a news that the liberal democracy has such a critical weakness. It was Germans who physically experienced that weakness of a liberal democracy when they saw, in 1932∼1933, Adolf Hitler’s Nazis Party turn the Weimar Republic into the Third Reich first by winning a parliamentary election and then by seizing the legislative power from the Reichstag by ramming through a bill to that effect. It was an attempt by the founders of West Germany, when it came into being in 1949 in the wake of the end of World War II in 1945, to prevent the recurrence of an implosion of democracy when they wrote the concept of die wehrhafte Democratie (the defensive democracy), into their Basic Law, West German version of a constitution. In addition to equipping itself with such constitutional apparatuses as the Supreme Federal Constitutional Court (SFCC) armed with the right to dissolve unconstitutional political parties, the constitutional protection agencies, both federal and local, authorized to monitor, even allowing wire-tappings, activities of suspected unconstitutional activities and authorization of both federal and local governments to dissolve social associations suspected of unconstitutional activities, West Germany’s measures to defend its liberal democracy also included an executive order, entitled Extremistenbeschluss, issued by none other than Chancellor Willy Brandt, champion of the ‘ Ostpolitik’ as the leader of the SPD government, that made it mandatory for any would-be public employee to “publicly pledge in writing his/her loyalty to the liberal democratic values as embodied in the Basic Law.” The executive order was challenged by a broad range of progressively oriented West German public on charges of being unconstitutional, to which West Germany’s SFCC ruled it “constitutional” in May 1975. As a result, two West German radical political parties were dissolved by SFCC ruling, in addition to 371 social organizations dissolved by both federal and local governments on suspicion of unconstitutionality in the absence of court rulings to that effect, while, altogether, 3,5 million West Germans pledged their loyalties to the liberal democratic values in accordance with Willy Brandt’s executive order that still remains in effect in unified Germany, with 2,250 men/women having failed to be appointed as public employees because of their failure to have their loyalty pledges authenticated. While West Germany’s success not only in raising itself to its phenomenal economic recovery dubbed as the “Miracle on the Rhine” that accompanied its growth as a leading democracy in West Europe eventually leading to unification of Germany achieved through West’s absorption of East in 1990 owed a great deal to West Germany’s success in developing a “defensive democracy,” it looks loudly clear that the case of Lee Seok Ki is a testimonial to the fact that, although she boasts of her economic success called the “Miracle on the Han River,” the Republic of Korea has developed a fatal weakness in defending its democracy against threats from within.

고령여성의 VDR유전자 타입별 순환운동에 따른 근골계체력 및 골대사마커의 연구

이동복(Lee, Dong-Bok) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.1

The purpose of this study was to provide the basic data of optimal exercise conditions for elderly women during exercise prescription through the study of postmenopausal musculoskeletal fitness and bone metabolism markers in a total of 21 patients of the elderly 65 - year - old woman with VDR gene polymorphism. The results are as follows. In musculoskeletal fitness, there was interaction effect in grip strength and bone density, and in bone markers, interaction effect in ALP.In elderly women, exercise by differentiating the VDR genotype by exercise type can be expected to have positive effects on musculoskeletal fitness and bone metabolism.

화력발전소용 Fe-18%Cr-10%Ni 강의 고온 SO₂ 가스 부식

이동복(Dong-Bok Lee) 한국표면공학회 2007 한국표면공학회지 Vol.40 No.5

The corrosion characteristics of Fe-18Cr-10Ni steels were studied between 600℃ and 1000℃ in Ar+(0.2, 1)%SO₂ gas for up to 300 hr in order to employ Fe-18Cr-10Ni steels in the coal-fired power plants. The corrosion resistance of Fe-18Cr-10Ni steels was good due mainly to the high amount of Cr, which formed Cr₂O₃ from the initial corrosion stage. Fe in the steels corroded to mainly Fe₂O₃ and Fe₃O₄. Ni was not susceptible to corrosion under the current corrosion condition. Relatively thin, single-layered scales formed.

니켈기 인코넬 713합금의 800-1100oC에서의 대기중 고온산화

이동복(Dong Bok Lee) 한국표면공학회 2011 한국표면공학회지 Vol.44 No.5

The Ni-based superalloy, Inconel 713, was oxidized at 800∼1100℃ for 50 and 100 hours in air. It displayed excellent oxidation resistance, forming a few micrometer-thick scales. The major scale was α-Al₂O₃. Other scales formed were TiO₂, NiAl₂O₄ and Cr₂O₃. Generally, uniform oxidation occurred over the alloy surface, resulting in the formation of α-Al₂O₃ with and without Cr₂O₃. Other oxides such as TiO₂ and NiAl₂O₄ sometimes also formed. Locally, nodular oxidation occurred at the nodules that consisted of diverse alloying elements. The scales were adherent at 800℃. However, they spalled a little at 900∼1100℃.

바이오매스 발전시 염소가스에 의한 고온부식

이동복(Dong Bok Lee) 한국표면공학회 2016 한국표면공학회지 Vol.49 No.1

Biomass is a renewable and sustainable source of energy used to create electricity or pressurized steam. In biomass-fueled power plants, wood waste or other waste is burned to produce steam that runs a turbine to make electricity, or that provides heat to industries and homes. Biomass power plants, apart from producing energy, help to reduce the CO₂ emission. However, the main problem is the high-temperature corrosion due to fuel corrosivity, especially of the straw. This limits both the temperature of the steam and also the effectiveness of the power plant. The corrosion in biomass-fueled plant was described.