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Investigation of Internal Oxidation on Pt-Ir-Zr High-Temperature Alloy
基金项目:

Yunnan Province Fundation (2007E125M); National Basic Research Program of China (2008CB617609)


Investigation of Internal Oxidation on Pt-Ir-Zr High-Temperature Alloy
Fund Project:

Yunnan Province Fundation (2007E125M); National Basic Research Program of China (2008CB617609)

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    摘要:

    An internal oxidation method was applied to investigate the dispersion-strengthening of Pt-Ir-Zr alloy, and the thermodynamic condition was explored for this alloy. Scanning electron microscopy (SEM) was employed to analyze the internal oxidation morphologies. Combining with tensile strength, the optimal internal oxidation time was determined. The results show that oxidation of Ir and Zr will occur under the experimental condition, and the oxygen pressure of Zr is lower than that of Ir. The grain size of the alloy increases with the prolonging of time and remains stable when the oxidation time is up to 40 h. The tensile strength decreases exponentially with the increase of oxidation time. The time for optimal internal oxidation is 40 h at 1100 °C.

    Abstract:

    An internal oxidation method was applied to investigate the dispersion-strengthening of Pt-Ir-Zr alloy, and the thermodynamic condition was explored for this alloy. Scanning electron microscopy (SEM) was employed to analyze the internal oxidation morphologies. Combining with tensile strength, the optimal internal oxidation time was determined. The results show that oxidation of Ir and Zr will occur under the experimental condition, and the oxygen pressure of Zr is lower than that of Ir. The grain size of the alloy increases with the prolonging of time and remains stable when the oxidation time is up to 40 h. The tensile strength decreases exponentially with the increase of oxidation time. The time for optimal internal oxidation is 40 h at 1100 °C.

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Kang Feifei, Geng Yonghong, Chen Song, Guan Weiming, Zhang Kunhua. Investigation of Internal Oxidation on Pt-Ir-Zr High-Temperature Alloy[J].稀有金属材料与工程,2011,40(4):585~589.[Kang Feifei, Geng Yonghong, Chen Song, Guan Weiming, Zhang Kunhua. Investigation of Internal Oxidation on Pt-Ir-Zr High-Temperature Alloy[J]. Rare Metal Materials and Engineering,2011,40(4):585~589.]
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  • 收稿日期:2010-04-25