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송정일(J. I. Song),권용구(Y. G. Kwun),주원경(W. K. JOO),왕일기(Y. Q. Wang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
We developed 'Turny type power seat' that the disabled and old persons can safely get on and off a car from its driving seat. The developed power seat in this study is available located on the vehicle such as minivan, car. Because it is available located on the car with the rotation’s radius reduced that the height of getting on and off can be regulated. As a result, structure analysis of power seat modeling is based on a basis of ADA platform deflection to ensure safety. If the development of productive force is assured, the situation that the authoritative power seat depends on import will be replaced.
Cyclic Oxidation Behavior of Thermal Barrier Coatings Irradiated by High-intensity Pulsed Ion Beam
J. I. Song(송정일),Y. Q. Wang(왕일기),Y. G. Kwun(권용구),W. K. JOO(주원경) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
High-temperature oxidation resistance of 7 wt. % Y₂O₃-ZrO₂ thermal barrier coatings (TBCs) irradiated by high-intensity pulsed ion beam (HIPIB) has been investigated in a cyclic oxidation condition at 1050 ℃×1 h. The characteristics of the columnar grains disappeared after HIPIB irradiation at the ion current densities of 100-200 A/㎠, and the irradiated surface presented a smoothed, densified feature after the remelting and ablation due to the HIPIB irradiation. The cross-sectional morphologies of HIPIB-irradiated TBCs show less oxidation of the NiCoCrAlY bonding layer, with a thinner thermally grown oxide (TGO) layer. The morphology observation is consistent with the results of cyclic oxidation test. It is found that the inward diffusion of oxygen through TBCs can be significantly impeded by the desified top layer by the HIPIB irradiation, thus limiting the oxidation of the bonding layer, improving the overall oxidation resistance of the irradiated TBCs.