Chang-Soo Kim

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Cardiovascular drug-eluting stents (DES) are widely applied medical products to treat diseased narrowed arteries. Despite their wide application, there still are many clinical adverse effects associated with DES implantation. One of the major issues is that the coatings comprised of drug and polymer phases are often delaminated during the deployment of the(More)
The five parameter grain boundary character distribution quantifies the relative areas of different types of grain boundaries, distinguished by their lattice misorientation and grain boundary plane orientation. The viewpoint presented in this paper is that this distribution is a sensitive metric of polycrystalline structure that can be related to(More)
To identify factors that might affect capillary driving forces and interface structure-dependent mechanisms for coarsening, we have used a stereological analysis to determine the changes in the morphology of SrTiO 3 crystals in contact with a titania-rich liquid at 15001C. A combination of flat and curved surfaces is observed in contact with the liquid. The(More)
Electron backscattered diffraction has been used to determine the orientation of WC crystals in a WC-Co composite and atomic force microscopy has been used to measure the shapes of planar sections of the same crystals. A stereological analysis has been used to determine that { } 10 1 0 prism facets and the {0001} basal planes are the WC surfaces that are(More)
The geometric and crystallographic characteristics of interfaces in WC–Co composites with a range of grain sizes and carbide volume fractions have been comprehensively characterized. The carbide crystals are most frequently terminated by (0001) and ð10 10Þ surfaces. The average number of carbide vertices per grain and the basal-to-prismatic face area ratio(More)
We report the first application of a five-parameter determination of grain boundary types to grain boundary engineered alpha-brass. The most important findings were that the distribution of planes showed a prevalence of <110> tilt boundaries, especially asymmetric tilt types, and the presence of <111> twist boundaries. This distribution resulted from the(More)
PURPOSE RB94, a truncated form of RB110, has enhanced tumor suppressor potency and activity against all tumor types tested to date including bladder carcinoma. However, efficient, systemic delivery of the gene encoding RB94 specifically to tumors, is an obstacle to clinical application as an anticancer therapeutic. We have developed a systemically given,(More)
Two-dimensional finite element simulations were used to study the effects of orientation texture on the transverse rupture strengths of WC–Co composites. The model incorporates observed microstructural geometries, anisotropic thermal and elastic properties, and a fracture criterion that reproduces the strengths of known specimens. The results show that the(More)
This paper analyzes the changes in the five-parameter grain boundary character distribution in alpha-brass brought about by iterative thermomechanical processing (ITMP). In both reference and ITMP specimens, there was a tendency for boundaries to terminate on {111} planes. The high incidence of coherent twins and other boundaries terminated on {111} planes(More)
The grain boundary character distribution in an Fe-1%Si steel has been measured as a function of lattice misorientation and boundary plane orientation. There is a weak texture in the space of grain boundary planes that favors the {110} orientation. At specific misorientations, the anisotropy is larger. For example, when the lattice misorientation is 60°(More)