43 Result(s)

Article

Welding Characteristics of Dissimilar Welding of SM45C and STS304 Using Nd:YAG Laser

The Nd:YAG laser welding process is one of the most advanced manufacturing technologies and has increased the automation and flexibility of an industry. Laser welding of dissimilar metals has been widely used ...

Y. T. Yoo, H. J. Lee, J. W. Kim in Strength of Materials (2023)

Article

Structural, electrical, and multiferroic properties of Aurivillius Bi₆Fe₂(Ti_3-xV_x)O_18+δ thin films prepared by chemical solution deposition

Aurivillius type five-layered V-doped Bi₆Fe₂(Ti_3-xV_x)O_18+δ (x = 0.00, 0.03, 0.06, and 0.09) thin films were prepared on Pt(111)/Ti/SiO₂/Si(100) substrates by using a chemical solution deposition method. All the t...

C. M. Raghavan, J. W. Kim, S. S. Kim, J. -W. Kim, T. K. Song in Journal of Electroceramics (2016)

Article

Study on Compression Molding of an Intercrossed Prepreg Glass Fiber-Reinforced Plastic

In this paper, a specimen of 80 × 80 × 3.8 mm dimensions is cut out from the prepreg intercrossed glass fiber-reinforced plastic (GFRP) and subjected to hot compression molding. The experimental flow front of ...

J. W. Kim in Strength of Materials (2016)

Article

Structural and improved electrical properties of rare earth (Sm, Tb and Ho) doped BiFe_0.975Mn_0.025O₃ thin films

Pure BiFeO₃ (BFO) and rare earth (RE) ion co-doped (Bi_0.9RE_0.1)(Fe_0.975Mn_0.025)O₃ (RE = Sm, Tb and Ho, denoted by BSFM, BTFM and BHFM) thin films were prepared on Pt(111)/Ti/SiO₂/Si(100) substrates by using a che...

C. M. Raghavan, J. W. Kim, S. S. Kim in Journal of Electroceramics (2013)

Article

Enhancement of ferroelectricity in gadolinium (Gd) and transition metal (Ni, Co, Cr) Co-doped BiFeO₃ thin films via a chemical solution deposition technique

The BiFeO₃ (BFO) and the gadolinium and transition metal ions co-doped (Bi_0.9Gd_0.1)(Fe_0.975 TM _0.025)O_3-δ (TM = Ni, Co and Cr, BGFNi, BGFCo and BGFCr) thin films were prepared on P...

J. W. Kim, S. S. Kim, H. J. Kim, W. J. Kim, C. M. Raghavan… in Journal of Electroceramics (2013)

Article

Effects of transition metal (Ni, Mn, Cu) do** on ferroelectric properties of Bi_0.9Nd_0.1FeO₃ thin films prepared by chemical solution deposition method

Transition metal (Ni, Mn, Cu) doped Bi_0.9Nd_0.1FeO₃ thin films were prepared on Pt(111)/Ti/SiO₂/Si(100) substrates by using a chemical solution deposition method. Compared to pure BiFeO₃ (BFO) thin film, improved ...

D. Do, J. W. Kim, T. K. Song, S. S. Kim in Journal of Electroceramics (2013)

Article

Metal-Matrix Nanocomposites with Tailored Coefficients of Thermal Expansion for Improved Thermomechanical Reliability

Ensuring the thermomechanical reliability of various interfaces in thermoelectric (TE) devices during manufacture and operation is challenging, especially for those incorporating TE materials with small coeffi...

J. E. Trujillo, J. W. Kim, E. H. Lan, S. Sharratt… in Journal of Electronic Materials (2012)

Article

Ferroelectric and dielectric properties of SrBi₄Ti₄O₁₅ thin films grown on Bi₄Ti₃O₁₂ film layer

Ferroelectric and dielectric properties of bilayered ferroelectric thin films, SrBi₄Ti₄O₁₅ grown on Bi₄Ti₃O₁₂, were investigated. The thin films were annealed at 700°C under oxygen atmosphere. The bilayered thin ...

D. Do, S. S. Kim, S. W. Yi, J. W. Kim in Applied Physics A (2009)

Article

Characterization of oxide scales formed on low carbon steel between 1100 and 1250 °C in air

A low carbon steel was oxidized isothermally at temperatures of 1100–1250 °C for up to 2 h in air, and the oxide scales were examined. Several hundred micrometer-thick scales formed owing to poor oxidation res...

J. W. Kim, J. W. Choi, D. B. Lee in Metals and Materials International (2005)

Article

Feasibility of electro-slag cast steel for hot-working tools

A study on electro-slag cast steel has been performed to assess the feasibility of its use in hot-working tools in place of traditional forged steels. In this study, some important material properties that are...

Y. H. Moon, J. W. Kim, C. J. Van Tyne in Metals and Materials International (2005)

Article

In situ X-ray Reflectivity Study of Oxidation Kinetics in Iron and Stainless steel

In situ specular x-ray reflectivity was applied to study the growth kinetics of passive oxide films on iron and stainless steel substrates in pH 8.4 borate buffer solution. Under electrical potential from 0 to 80...

D. H. Kim, S. S. Kim, H. H. Lee, H. W. Jang, J. W. Kim… in MRS Online Proceedings Library (2005)

Article

Ferromagnetic Properties of Mn-Doped III–V Semiconductor Quantum Wells

We investigate magnetic properties of In_1−xMn _x P and Ga_1−xMn _x N quantum wells in the mean-field approximation and show the difference between ...

N. Kim, J. W. Kim, S. J. Lee, Y. Shon, T. W. Kang, G. Ihm… in Journal of Superconductivity (2005)

Article

Synthesis and electrorheology of aniline/pyrrole copolymer

C. H. Cho, H. J. Choi, J. W. Kim, M. S. Jhon in Journal of Materials Science (2004)

Article

Synthesis of epitaxial γAl₂O₃ thin films by thermal oxidation of AlN/sapphire(0001) thin films

The synthesis of epitaxial γAl₂O₃ films by oxidizing AlN/sapphire(0001) films was investigated in a synchrotron X-ray scattering experiment. Porous γAl₂O₃ nucleates on the surface of the AlN film when annealed ab...

H.C. Kang, S.H. Seo, H.W. Jang, D.H. Kim, J.W. Kim, D.Y. Noh in Applied Physics A (2003)

Article

Liquid crystal added electrorheological fluid

J. C. Ryu, J. W. Kim, H. J. Choi, S. B. Choi… in Journal of Materials Science Letters (2003)

Article

Electrical properties of the Pt/Sr_0.85Bi_2.4Ta₂O₉/TiO₂/Si structure with variation of the Sr_0.85Bi_2.4Ta₂O₉ film thickness

J. W. Kim, J. D. Park, J. H. Choi, T. S. Oh in Journal of Materials Science Letters (2003)

Article

Dependence of the magnetic properties of Y_1−x Yb _x Ba₂Cu₃O_7−y :F_3x superconductors on the Yb mole fraction

C. O. Kim, J. W. Kim, J. S. Park, T. W. Kim in Journal of Materials Science Letters (2002)

Article

Synthesis and electrorheology of camphorsulfonic acid doped polyaniline suspensions

 Semiconducting camphorsulfonic acid doped polyaniline (PANI–CSA) particles were synthesized by chemical oxidation polymerization, and their chemical structure and particle size were examined via Fourier trans...

W. H. Jang, J. W. Kim, H. J. Choi, M. S. Jhon in Colloid and Polymer Science (2001)

Article

Monodisperse glycidyl-functional polymer particles in the micron-size range by seeded polymerization

Polymer particles having glycidyl ether groups were prepared through seeded polymerization in aqueous medium. The polystyrene seed particles were swollen with a mixture of n-butyl methacrylate, glycidyl methacry...

J.-G. Park, J.-W. Kim, K.-D. Suh in Colloid and Polymer Science (2001)

Article

Electrorheological fluids based on chitosan particles

W. H. Jang, Y. H. Cho, J. W. Kim, H. J. Choi… in Journal of Materials Science Letters (2001)