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

制御された低圧酸化と熱力学的解析によるZr-N-O三元系のZr過剰領域の特徴

Lam, Do Van*; Do, Thi Mai Dung*; 小川 徹

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

Zr-N-O三元系のZr過剰領域の特徴を明らかにするために、金属ジルコニウムに窒化と低酸素分圧酸化とを施した。低酸素分圧はMo/MoO$$_{2}$$あるいはCu$$_{2}$$O/CuOのREDOX対を用いることで発生させた。処理後の資料はX線回折、金相観察、EPMAにより特性を把握した。実験結果を副格子モデルを用いた熱力学的解析と組み合わせることで、1373Kにおける三元系等温図を作成した。

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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パーセンタイル:10.71

分野:Nuclear Science & Technology

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