News Column

Findings from Seoul National University in the Area of Non-Crystalline Solids Reported

May 6, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Current study results on Non-Crystalline Solids have been published. According to news originating from Seoul, South Korea, by VerticalNews correspondents, research stated, "Al86Ni10MM4 (MM: Mischmetal) amorphous ribbons were prepared by melt spinning on a child copper wheel. Non-isothermal crystallization kinetics of the amorphous alloy was studied by differential scanning calorimetry (DSC)."

Our news journalists obtained a quote from the research from Seoul National University, "The crystallized phases were determined by X-ray diffraction method and transmission electron microscopy. DSC traces were analyzed by Kissinger method to determine the apparent activation energy of crystallization. Changes in the activation energy (E-alpha) with progression of crystallization were also evaluated by differential iso-conversional method of Friedman. For the precipitation of nanometer-sized Al particles, the activation energy slightly increased with increasing the conversion fraction up to alpha = 0.2, but remained almost constant until alpha = 0.8. Because of the solute enrichment around the particles in the matrix, higher values of E-alpha, were obtained at the late stage of crystallization."

According to the news editors, the research concluded: "Results of nano-indentation test also showed a significant improvement in the hardness of the ribbons due to the formation of fcc-Al nanoparticles."

For more information on this research see: Non-isothermal kinetic studies of crystallization in amorphous Al86Ni10MM4 alloy. Journal of Non-Crystalline Solids, 2014;387():36-40. Journal of Non-Crystalline Solids can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Journal of Non-Crystalline Solids -

The news correspondents report that additional information may be obtained from M. Mansouri, Seoul National University, Res Inst Adv Mat, Dept. of Mat Sci & Engn, Seoul 151744, South Korea. Additional authors for this research include A. Simchi, J.I. Lee, E.S. Park and N. Varahram.

Keywords for this news article include: Asia, Seoul, South Korea, Non-Crystalline Solids

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Source: Journal of Technology

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