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Kimura M.,Materials Charcterization Research Laboratory
Nippon Steel Technical Report | Year: 2011

Synchrotron Radiation (SR), an X-ray beam which is generated using a highpower accelerator, has excellent characteristics of high brilliance, parallel beam, white beam, and pulse beam. We have utilized SR to investigate various materials and processes since 1987. One of the best advantages is that we can observe changes in structures of materials in real environments ("in situ") and real time-scale ("dynamic"). Furthermore, we can obtain not only the averaged information of the bulk material but also the unique information on (a) surface and/or interface in the depth of a nm-scale, (b) specific element, and (c) crystal information with a high accuracy. We show some of recent researches using developed observation techniques using SR.

Hayashi S.-I.,Materials Charcterization Research Laboratory | Tsuji N.,Materials Charcterization Research Laboratory | Nishinomiya S.,Materials Charcterization Research Laboratory | Kubota N.,Materials Charcterization Research Laboratory
Nippon Steel Technical Report | Year: 2011

FIB-TOF-SIMS apparatus to evaluate a suspended particulate matter has been developed at JST Development of System and Technology for Advanced Measurement and Analysis "Apparatus for evaluating formation and dispersion history of single particle by focused ion beam and laser ionization techniques". A lateral revolution for scanning ion microscope observation is achieved about 10nm, and one for SIMS imaging is about 40nm. This technique is applied to evaluate the chemical states of boron whose leaching is strictly controlled by the regulation from the coal fly ashes, which have different elution characteristics. Boron exists at the top surfaces of fly ash particles which have higher leaching characteristic, and concentrates in the inner part of CaO-MgO particle, especially CaO, which have lower leaching characteristics. This technique can become very useful analytical technique for development of environmentally-friendly steel making process for sustainable development.

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