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고령여성의 ACE유전자 타입별 순환운동이 최대산소섭취량과 혈압의 변화
이동복 한국체육과학회 2022 한국체육과학회지 Vol.31 No.3
The objectives of this study is to provide the basic data for personalized exercise prescription for each gene type elderly women through testing of VO2max and blood pressure before and after the application of the circuit exercise program to elderly women by ACE gene type. The study subjects were selected 8 people by ACE gene type from among the female elderly subjects over the age of 65, and 8 weeks of circuit exercise were performed, and the results were derived using statistical methods through Two-way ANOVA analysis of the maximum oxygen intake and the test results for changes in blood pressure associated with the ACE gene.
Comments on the high temperature oxidation characteristics of Ti3SiC2 in air
이동복,Thuan Dinh Nguyen,Jung-Ho Choi,박상환 한양대학교 세라믹연구소 2007 Journal of Ceramic Processing Research Vol.8 No.6
The high temperature oxidation characteristics of Ti3SiC2 have been studied extensively before. However, we believe that there are still the ambiguous points concerning the scale structure and oxidation mechanism of Ti3SiC2. Hence, the oxide scales formed, the distribution and roles of Ti, Si and C in the scale, and the oxidation mechanism are discussed based on the results obtain from this and previous studies. In this study, Ti3SiC2 compounds were produced via a powder metallurgical process, oxidized between 900 and 1200 oC in air for up to 100 h, and the oxidation characteristics are discussed.
Oxidation of ZC63 Mg Alloys Reinforced with SiC Particles between 390 °C and 500 °C in Air
이동복,Thuan Dinh Nguyen,김영직 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.5
The ZC63 magnesium alloys reinforced with 10 wt.% of SiC particles with an average particle size of 50μm were cast. The fabricated SiCp/ZC63 composite consisted of an α-Mg matrix, unreacted α-SiC particles,and an intergranularly formed CuMgZn compound. It was oxidized at 390 °C to 500 °C up to 5 h in air. The oxide scales were thin and compact below 430 °C, but became porous and loose above 450 °C. They consisted primarily of MgO and a small amount of Mg3N2. SiC particles were stable over the temperature range explored.
High Temperature Corrosion of Al₃Ti-Cr Intermetallics in an Ar-1 %SO₂ Gas Atmosphere
이동복 대한금속·재료학회 2008 METALS AND MATERIALS International Vol.14 No.3
L1₂-type Al₃Ti-Cr alloys of compositions 67Al-25Ti-8Cr, 66Al-24Ti-10Cr, and 59Al-26Ti-15Cr (in atomic percent) were corrosion tested between 800 ℃ and 1100 ℃ in an Ar-1 % SO₂ gas atmosphere for up to 150 h. Corrosion proceeded mainly via oxidation reactions. The scale consisted primarily of a thin Al₂O₃ barrier layer. The alloys tested had much better corrosion resistance than TiAl-base alloys or Hastelloy X. Virtually no sulfides were detected in the scale, because of the strong oxidizing tendency of the Al3Ti-Cr alloys having high Al concentrations.
High temperature oxidation characteristics of NiCoCrAlY coating for gas turbines
이동복,최정호 한양대학교 세라믹연구소 2006 Journal of Ceramic Processing Research Vol.7 No.2
About 200 μm-thick 32.5Ni-38.5Co-21Cr-8Al-0.5Y (wt.%) coatings were sprayed onto Hastelloy-X using a high velocity oxyfuel spraying (HVOF) method, and were oxidized between 900 and 1100oC in air to study their oxidation behavior. The coating consisted mainly of Ni3Al with some Ni. Relatively thin scales were formed on the coating, due mainly to the formation of α- Al2O3. Additionally, some CoCr2O4 and Al5Y3O12 formed. Beneath the oxide layer, an Al-depleted zone existed.
Oxidation of Nitride Layers Formed on Ti-6Al-4V Alloys by Gas Nitriding
이동복,김민정,Li Chen,박상환,Oleh Yaskiv,Iryna Pohrelyuk,Viktor Fedirko 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.3
Ti-6Al-4V alloys were nitrided through gas nitriding at 950 °C for 3 h in deoxygenated, atmospheric nitrogen gas. During nitriding, nitrogen reacted and diffused into the alloys to form Ti2N and a meager amount of TiN in a Ti-N compound layer with a thickness of 20 μm to 25 μm. An α-Ti(N) diffusion layer with a thickness of 40 μm to 80 μm formed below this layer. A small amount of Al was dissolved at the top of the Ti-N compound layer because of the strong interaction of nitrogen with Ti and Al. Nitriding resulted in the dissolution of interstitial nitrogen and the formation of nitrides. Oxidation of the nitrided Ti-6Al-4V alloys initially resulted in the formation of a Ti-N-O layer, which later oxidized to TiO_2. Above 800 °C, the nitrided alloys oxidized rapidly, accompanied by microcracking of the TiO_2 surface layer.