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| 1 | 镍基变形高温合金在高温环境下的氧化行为(英文)显示文摘研究了617和Haynes230高温合金在含H2O和O2的不纯氦气、含氢的热蒸汽、空气以及纯氦气中的900℃氧化行为。与空气相比,氦气、含氢的热蒸汽对617合金的氧化速率没有明显影响,而Haynes230合金在氦气中表现出较慢的氧化速率。617合金的氧化层形貌和结构受环境的影响明显,而Haynes230受环境的影响不明显。在所有的氧化环境中,Haynes230合金的氧化层都包含有中间层Cr2O3和外保护层MnCr2O4,这使其具有较好的抗氧化性能。合金的表面抗氧化性能明显影响其力学性能,如蠕变和拉伸性能。因此,有必要采取表面处理来增强合金的抗氧化性能。 | Changheui JANG Daejong KIM Donghoon KIM Injin SAH Woo-Seog RYU Young-sung YOO | 2011 | Transactions of Nonferrous Metals Society of China2011，21，7： | 8 |
| 2 | Effects of Aging in High Temperature Helium Environments on Room Temperature Tensile Properties of Nickel--bases Super alloys 显示文摘 | DAEJONG Kim INJIN Sah CHANGHEUI Jang | 2011 | Materials Science and Engineering A2011，528，3： | 1 |
| 3 | Parametric studies on static and dynamic performance of air foil bearings with different top foil geometries and bump stiffness distributions显示文摘 | KIM Daejong | | 0，，02： | 1 |
| 4 | Corrosion characteristics of Ni-base superalloys in high temperature steam with and without hydrogen显示文摘 | Donghoon Kim Daejong Kim Ho Jung Lee Changheui Jang Duk Joo Yoon | 2013 | 2013 (1-3)2013，，1： | 1 |
| 5 | Oxidation Be haviour of an Alloy 617 in Very High Temperature Air and Helium Environments显示文摘 | Jang Changheui Lee Daejin Kim Daejong | 2008 | Pressure Vessels and Piping2008，85，： | 1 |
| 6 | Oxidation Characteristics and Oxide Layer Evolution of Alloy 617 and Haynes 230 at 900?°C and 1100?°C显示文摘 | Daejong Kim Changheui Jang Woo Seog Ryu | 2009 | Oxidation of Metals (-)2009，，5： | 1 |
| 7 | 应用于燃料电池的高速单级空气压缩机波箔轴承技术显示文摘The motivation to use air foil bearings in fuel cell compressors is driven by the demand for oil-free and high-power density system to reduce system volume and weight. The characteristics of air foil bearings that realize this demand are its independency on auxiliary system and no scheduled maintenance as well as their superb performance at high speeds. However, integration of the foil bearings to the compressor needs rigorous developmental tests for the bearing to withstand high g-load during vehicle maneuver and to remain stable in rotordynamics under external destabilizing forces. This paper presents multi-pads foil bearing technology applicable to single stage high speed fuel cell air compressors.Two different multi-pad air foil bearing designs(two-pad vs three-pad) were tested using a high-speed spin test rig to identify the differences in rotordynamics responses. The two-pad bearing is superior in rotordynamics without any sub-synchronous vibration while three-pad bearing provides more uniform load capacity in all directions with less rotordynamics stability. Frequency-domain modal analyses verify the experimental observations. Axial foil bearings with 38 mm outer diameter was designed and tested up to 140 krpm with load capacity of 90 N(1.4 bar specific load capacity).Finally, a platform design of single stage 15 k W fuel cell compressor with rated speed of 130 krpm is proposed using the multi-pad foil bearings and axial foil bearings developed through this paper. | Daejong Kim | 2021 | 风机技术2021，63，1： | 1 |
| 8 | Nonlinear observer design by dynamic observer error linearization显示文摘 | Daejong Jo Noh Nam H Seo Jin H | 2004 | IEEE Transactions on Automatic Control2004，49，10： | 1 |
| 9 | Design of Flexure Pivot Tilt- ing Pads Gas Bearings for High - Speed Oil - Free Mi- croturbo - Machinery 显示文摘 | Sim Kyuho Kim Daejong | 2007 | Journal of Tribology2007，129，： | 1 |
| 10 | Parametric studies on static and dynamic performance of air foil hearings with different top foil geometries and bump stiffness distributions显示文摘 | Daejong Kim | 2007 | Tribology2007，129，2： | 1 |
| 11 | miR‐206 regulates brain‐derived neurotrophic factor in Alzheimer disease model显示文摘 | Soon‐Tae Lee Kon Chu Keun‐Hwa Jung Jin Hee Kim Ji‐Young Huh Hyejin Yoon Dong‐Kyu Park Ji‐Yeon Lim Jeong‐Min Kim Daejong Jeon Hoon Ryu Sang Kun Lee Manho Kim Jae‐Kyu Roh | 2012 | Ann Neurol2012，，2： | 1 |
| 12 | Parametric Studies on Static and Dynamic Performance of Air Foil Bearings With Different Top Foil Geometries and Bump Stiffness Distributions显示文摘 | Daejong Kim | 2007 | Tribology2007，129，2： | 1 |
| 13 | Parametric studies on static and dynamic performance of air foil bearings with different top foil geom- etries and bump stiffness distributions 显示文摘 | Kim Daejong | 2007 | Tribology2007，129，2： | 1 |
| 14 | The immunosuppressant cyclosporin A inhibits recurrent seizures in an experimental model of temporal lobe epilepsy显示文摘 | Seungmoon Jung Hyunwoo Yang Byung Sun Kim Kon Chu Sang Kun Lee Daejong Jeon | 2012 | Neuroscience Letters2012，，2： | 1 |
| 15 | Oxidation Characteristics and Oxide Layer Evolution of Alloy 617 and Haynes 230 at 900?°C and 1100?°C显示文摘 | Daejong Kim Changheui Jang Woo Seog Ryu | 2009 | Oxidation of Metals (-)2009，，5： | 1 |
| 16 | 空气箔片轴承技术在高速单级燃料电池空压机上的应用显示文摘The motivation to use air foil bearings in fuel cell compressors is driven by the demand for oil-free and high-power density system to reduce system volume and weight.The characteristics of air foil bearings that realize this demand are its independency on auxiliary system and no scheduled maintenance as well as their superb performance at high speeds.However,integration of the foil bearings to the compressor needs rigorous developmental tests for the bearing to withstand high g-load during vehicle maneuver and to remain stable in rotordynamics under external destabilizing forces.This paper presents multi-pads foil bearing technology applicable to single stage high speed fuel cell air compressors.Two different multi-pad air foil bearing designs(two-pad vs three-pad)were tested using a high-speed spin test rig to identify the differences in rotordynamics responses.The two-pad bearing is superior in rotordynamics without any sub-synchronous vibration while three-pad bearing provides more uniform load capacity in all directions with less rotordynamics stability.Frequency-domain modal analyses verify the experimental observations.Axial foil bearings with 38mmouter diameter was designed and tested up to 140krpm with load capacity of 90N(1.4bar specific load capacity).Finally,a platform design of single stage 15kWfuel cell compressor with rated speed of 130krpm is proposed using the multi-pad foil bearings and axial foil bearings developed through this paper. | Daejong Kim | 2021 | 风机技术2021，63，4： | 0 |
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