연구성과 2 페이지 | 포항공과대학교 친환경소재대학원

커뮤니티

연구성과

Total 140건 2 페이지

124

NEDL [NEDL] Prof. Changshin Jo: Pseudocapacitive behavior of mesoporous tungsten oxide in aqueous Zn2+ electrolyte AbstractAqueous Zn-ion batteries or capacitors have attracted great interest for their potential use in grid-scale energy storage systems (ESSs). They have suitable properties such as high safety, low-cost materials, and stability of ..

작성자 최고관리자 작성일 2023-10-25
123

NEDL [NEDL] Prof. Changshin Jo: Recent progress in block copolymer soft-template-assisted synthesis of versatile mesoporous materials for energy storage systems AbstractSoft-templating methods, which utilize the block copolymer (BCP)-derived self-assembly with inorganic precursors, have been extensively applied to synthesize a wide range of mesoporous materials. Compared with other synthetic ..

작성자 최고관리자 작성일 2023-10-25
122

NEDL [NEDL] Prof. Changshin Jo: Block Copolymer-Directed Facile Synthesis of N‑Doped Mesoporous Graphitic Carbon for Reliable, High-Performance Zn Ion Hybrid Supercapacitor AbstractOrdered mesoporous carbons (OMCs) are promising materials for cathode materials of a Zn ion hybrid capacitor (ZnHC) due to their high surface area and interconnected porous structure. Graphitization of the framework and nitrog..

작성자 최고관리자 작성일 2023-10-25
121

NEDL [NEDL] Prof. Changshin Jo: Effects of chelating agent on the nanostructure of nickel hexacyanoferrate and its performance in seawater battery application AbstractWith the increasing demand for cost-effective and safe energy storage systems, seawater batteries (SWBs) are establishing themselves in the field of rechargeable batteries. In particular, cathode materials based on the interca..

작성자 최고관리자 작성일 2023-10-25
120

ADL [ADL] Prof. Yoon-Uk Heo: Direct observation of the ledge-typed twin boundary in a martensitic steel The structure at the {112} twin boundaries in martensitic steels has been extensively debated recently. On the one hand, it was claimed to be the omega phase, similar to Ti alloys. On the other hand, it was considered artifacts ind..

작성자 최고관리자 작성일 2023-09-14
119

ADL [ADL] Prof. Yoon-Uk Heo: Role of dislocation climb on twin boundary and antiphase boundary formations in inverse-spinel MnAl2O4 The defects, e.g., stacking faults (SFs), antiphase boundaries (APBs), and twin, have been considered the critical components commonly introduced during the synthesis process of spinel oxides. In this study, employing advanced tran..

작성자 최고관리자 작성일 2023-09-14
118

SSL [SSL] Prof. Sung-Joon Kim: Strong resistance to Zn-assisted liquid metal embrittlement of austenitic-TWIP/martensitic-HSLA multi-layered steel sheets additively manufactured by laser cladding Abstract: As a novel design idea to overcome a shortcoming of liquid metal embrittlement (LME) occurred frequently in twinning-induced plasticity (TWIP) steel, multi-layered steel (MLS) sheets consisting of austenitic TWIP and high-st..

작성자 최고관리자 작성일 2023-09-01
117

SSL [SSL] Prof. Sung-Joon Kim: Barricading Absorbed Hydrogen and Mitigating Hydrogen Embrittlement in High Mn Steel Through Superficial Strain-Induced ε-Martensite Abstract: This study reports a novel result on the effect of strain-induced superficial phase transformation on the mitigating hydrogen embrittlement of an austenitic high Mn steel. The obtained results revealed that the strain-induce..

작성자 최고관리자 작성일 2023-08-14
116

SSL [SSL]Prof. Sung-Joon Kim: Strain hardening analysis and deformation micromechanisms in high strength-high ductility metastable duplex stainless steels: Role of sustained stacking faults in the work ha… Abstract: The present research deals with work hardening analysis of two types (4Mn & 8Mn) high strength-high plasticity metastable duplex stainless steel (DSS). A three-stage (I, II, III) strain hardening rate (SHR) was recognize..

작성자 최고관리자 작성일 2023-08-14
115

SSL [SSL]Prof. Sung-Joon Kim: Correlation between grain size variation and hydrogen embrittlement in a cost-effective Fe40Mn40Ni10Cr10 austenitic medium entropy alloy Abstract: The effect of grain size variation (11 mm, 34 mm) on the hydrogen-induced tensile properties degradation of a Co-free cost-effective Fe40Mn40Ni10Cr10 austenitic medium entropy alloy was investigated using a slow strain rate ..

작성자 최고관리자 작성일 2023-08-14
114

SSL [SSL]Prof. Sung-Joon Kim: Effects of carbon and nitrogen on HallePetch relationship in austenitic stainless steel Abstract: HallePetch relationship was investigated for austenitic stainless steels with either 0.3 wt% C or N. It was found that HallePetch slope was higher for the nitrogen-containing steel, which implied that higher stress was requi..

작성자 최고관리자 작성일 2023-08-14
113

SSL [SSL] Prof. Sung-Joon Kim: Direct comparison of C and N effect on hydrogen embrittlement of stable 17Cr-10Ni-6Mn austenitic stainless steel Abstract : The effects of C and N on hydrogen embrittlement (HE) were investigated in 17Cr-10Ni-6Mn based stable austenitic stainless steels containing 0.2 wt% of either C or N. C and N increased tensile strength by solid solution har..

작성자 최고관리자 작성일 2023-08-14
112

CTL [CTL] Prof. Chang Hee Yim: Evolution of centerline carbides in a martensitic stainless steel slab during reheating treatment The formation and evolution of centerline carbides in a martensitic stainless steel slab are investigated using various characterization techniques. The intensive formation of carbides was observed close to the shrinkage cavity at the..

작성자 최고관리자 작성일 2023-07-26
111

CTL [CTL] Prof. Chang Hee Yim: Mechanism of Surface Corrosion in the Continuous Casting Guide Rolls Due to the importance of the surface on the final slab quality, it is essential to maintain a smooth segment roll surface that is in touch with the thin solid shell during solidification. In this paper, the surface of the used continu..

작성자 최고관리자 작성일 2023-07-26
110

SSL [SSL]Prof. Sung-Joon Kim : Microstructural evolution of liquid metal embrittlement in 1.5-GPa-grade Zn-coated hot-press-forming steels AbstractZn-assisted liquid metal embrittlement (LME) in hot press forming (HPF) steels is attributed mainly to the cracking inside both Zn coating and HPF substrate, but very few studies on how the Zn coating composed of Fe–Zn in..

작성자 최고관리자 작성일 2023-06-08
109

SSL [SSL]Prof. Sung-Joon Kim : Effects of strain rate on tensile ductility in Cu-added stable Fe–Cr–Ni-based austenitic stainless steels AbstractThe mechanical properties of the austenitic stainless steels (ASSs) at high strain rates are receiving significant attention for interpreting the mechanical behavior of automotive members during the severe forming operations.H..

작성자 최고관리자 작성일 2023-06-08

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