Search Results - "Park, Yejun"

Pulsed laser-assisted additive manufacturing of Ti-6Al-4V for in-situ grain refinement by Yoon, Hansol, Liu, Peipei, Park, Yejun, Choi, Gwanghyo, Choi, Pyuck-Pa, Sohn, Hoon

“…Metal additive manufacturing (AM) enables rapid customization of complex parts. However, it leads to forming of columnar grain structures which give the AM…”
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Prevention of hot cracking in Ni-based superalloy via passivation layer formation during additive manufacturing by Ryou, KenHee, Park, Yejun, Im, Hye Ji, Choi, Pyuck-Pa

“…We investigated the prevention of hot cracking in a non-weldable Ni-based superalloy by utilizing a passivation layer formed through laser-based directed…”
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Elucidating the evolution of long-period stacking ordered phase and its effect on deformation behavior in the as-cast Mg-6Gd-1Zn-0.6Zr alloy by Lee, Sangwon, Park, Yejun, Go, Jongbin, Kim, Young Mok, Sohn, Seok Su, Li, Jiehua, Choi, Pyuck-Pa

“…Herein, the evolution of long-period stacking ordered (LPSO) phases in the as-cast Mg-6Gd-1Zn-0.6Zr (wt.%) alloy are investigated via transmission electron…”
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Highly Dispersed CeOx Hybrid Nanoparticles for Perfluorinated Sulfonic Acid Ionomer–Poly(tetrafluoethylene) Reinforced Membranes with Improved Service Life by Ahn, Juhee, Ali, Mobina Irshad, Lim, Jun Hyun, Park, Yejun, Park, In Kee, Duchesne, Denis, Chen, Lisa, Kim, Juyoung, Lee, Chang Hyun

“…CeOx hybrid nanoparticles were synthesized and evaluated for use as radical scavengers, in place of commercially available Ce(NO3)3 and CeO2 nanoparticles, to…”
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Electrochemical stability in cerium-phosphate–coated LiCoO2 thin films by Ahn, Donggi, Kim, Chunjoong, Lee, Joon-Gon, Kim, Byoungsoo, Park, Yejun, Park, Byoungwoo

“…The electrochemical stability of LiCoO2 thin films was improved by cerium-phosphate coating deposited at room temperature. The cerium-phosphate coating layer…”
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Promotion of topologically close-packed phases in a Ru-containing Ni-based superalloy by Lee, Sangwon, Do, Jeonghyeon, Jang, Kyuseon, Jun, Hosun, Park, Yejun, Choi, Pyuck-Pa

“…We report on the effects of Ru addition on the formation of topologically close-packed (TCP) phases in a Ni-based superalloy during high-temperature exposure…”
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Ultrafast nonlinear ultrasonic measurement using femtosecond laser and modified lock-in detection by Liu, Peipei, Yi, Kiyoon, Park, Yejun, Sohn, Hoon

“…•Measurement of nonlinear ultrasonic waves induced by a femtosecond laser.•Decomposition of linear and nonlinear ultrasonic responses using a modified lock-in…”
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Polyacrylonitrile Nanofiber Membrane Modified with Ag/GO Composite for Water Purification System by Jang, Wongi, Yun, Jaehan, Park, Yejun, Park, In Kee, Byun, Hongsik, Lee, Chang Hyun

“…Silver nanoparticle-modified graphene oxide (Ag/GO) was reliably prepared by using sodium borohydride (NaBH4) in the presence of citric acid capping agent via…”
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Structure/Reactivity Studies of Substituted O-Methyl Carbinolamides in Water as Function of pH by Park, YeJun

“…Carbinolamides are formed by the reaction of an amide and aldehyde with an accompanying proton shift. Interest in their chemistry has been increasing due to…”
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Modification of Gold Catalysis with Aluminum Phosphate for Oxygen-Reduction Reaction by Park, Yejun, Lee, Byungjoo, Kim, Chunjoong, Kim, Jongmin, Nam, Seunghoon, Oh, Yuhong, Park, Byungwoo

“…The activities of Au/AlPO4 nanocomposites with the variation of metal phosphates were examined for oxygen-reduction reactions, both in an alkaline and acidic…”
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Highly Dispersed CeO x Hybrid Nanoparticles for Perfluorinated Sulfonic Acid Ionomer-Poly(tetrafluoethylene) Reinforced Membranes with Improved Service Life by Ahn, Juhee, Ali, Mobina Irshad, Lim, Jun Hyun, Park, Yejun, Park, In Kee, Duchesne, Denis, Chen, Lisa, Kim, Juyoung, Lee, Chang Hyun

“…CeO hybrid nanoparticles were synthesized and evaluated for use as radical scavengers, in place of commercially available Ce(NO ) and CeO nanoparticles, to…”
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Electrochemical Promotion of Oxygen Reduction on Gold with Aluminum Phosphate Overlayer by Park, Yejun, Nam, Seunghoon, Oh, Yuhong, Choi, Hongsik, Park, Jungjin, Park, Byungwoo

“…The activities of Au electrodes with an AlPO4 overlayer were examined for oxygen-reduction reactions in alkaline media. Oxygen molecules on gold catalysts are…”
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The effects of ruthenium-oxidation states on Ru dissolution in PtRu thin-film electrodes by Park, Yejun, Lee, Byungjoo, Kim, Chunjoong, Oh, Yuhong, Nam, Seunghoon, Park, Byungwoo

“…The effects of ruthenium (Ru)-oxidation states were investigated on Ru dissolution from PtRu thin-film electrodes, with the 200 cycles between 0.4 and 1.05 V…”
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Effects of iron-phosphate coating on Ru dissolution in the PtRu thin-film electrodes by Park, Yejun, Lee, Byungjoo, Kim, Chunjoong, Kim, Jongmin, Park, Byungwoo

“…The effects of FePO4 nanoscale coating on PtRu thin films were investigated on the block of Ru crossover. Ru dissolution was examined by the…”
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Iron-phosphate∕platinum∕carbon nanocomposites for enhanced electrocatalytic stability by Kim, Chunjoong, Lee, Byungjoo, Park, Yejun, Park, Byungwoo, Lee, Jaeseung, Kim, Hasuck

“…The effects of Fe P O 4 - Pt ∕ C nanocomposites on the electrocatalytic properties were examined after 1000 accelerated cycles (up to 1.48 V vs normal hydrogen…”
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Methanol oxidation in nanostructured platinum/cerium-phosphate thin films by Park, Jungjin, Oh, Yuhong, Park, Yejun, Nam, Seunghoon, Moon, Joonhee, Kang, Joonhyeon, Jung, Dae-Ryong, Byun, Sujin, Park, Byungwoo

“…Nanostructured Pt/CePO 4 thin-film electrodes consisting of the Pt nanocrystallites and amorphous CePO 4 were synthesized by sputtering, and the enhanced…”
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Nanoporous Pt thin films with superior catalytic activities by the electrochemical dissolution of Al by Nahm, Changwoo, Kim, Chunjoong, Park, Yejun, Park, Byungwoo

“…Thin films of alloyed Pt x Al 1− x with various chemical compositions ( x ≅ 0.27, 0.52, and 0.76) were obtained by a co-sputtering method. As cycles proceeded,…”
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Electrochemical stability in cerium-phosphate–coated LiCoO 2 thin films by Ahn, Donggi, Kim, Chunjoong, Lee, Joon-Gon, Kim, Byoungsoo, Park, Yejun, Park, Byoungwoo

“…The electrochemical stability of LiCoO 2 thin films was improved by cerium-phosphate coating deposited at room temperature. The cerium-phosphate coating layer…”
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