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Journal Articles

Characterization of ZrN, ZrO$$_{2}$$ and $$beta$$'-Zr$$_{7}$$O$$_{11}$$N$$_{2}$$ nanoparticles synthesized by pulsed wire discharge

Lam, Do Van*; Suematsu, Hisayuki*; Ogawa, Toru

Journal of the American Ceramic Society, 100(10), p.4884 - 4892, 2017/10

 Times Cited Count:1 Percentile:8.04(Materials Science, Ceramics)

Nanoparticles of ZrN, ZrO$$_{2}$$ and ZrN, $$beta$$'-Zr$$_{7}$$O$$_{11}$$N$$_{2}$$ were synthesized by pulsed wire discharge. Morphology and phase analyses were carried out by X-ray diffraction and field-emission transmission electron microscopy (FE-TEM). By bright field image observation, electron energy loss spectroscopy (EELS) and selected area electron diffraction (SAD) analyses, those nanoparticles were separately characterized.

Journal Articles

Features of Zr-rich corner of the Zr-N-O ternary system by controlled low-pressure oxidation and thermodynamic analysis

Lam, Do Van*; Do, Thi Mai Dung*; Ogawa, Toru

Journal of Nuclear Science and Technology, 54(7), p.784 - 794, 2017/07

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

In order to clarify the Zr-rich corner of the Zr-N-O ternary system, a series of nitridation and controlled low-pressure oxidation heatings were made on zirconium metal. Low-partial pressures of oxygen were obtained by using a redox couple of either Mo/MoO$$_{2}$$ or Cu$$_{2}$$O/CuO. The heated samples were characterized by X-ray diffraction (XRD), optical microscopy and electron probe micro analysis (EPMA). Experimental results were coupled with a preliminary thermodynamic analysis with a sublattice formalism to draw a provisional ternary isotherm at 1373 K.

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