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氧對Vitreloy 105金屬玻璃熱穩(wěn)定性的增強作用
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國家自然科學基金資助項目（50671076）


Enhancement of Thermal Stability by Oxygen Impurity for Vitreloy 105 Metallic Glass
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    摘要:

    通過構建TTT圖及先析相析出動力學分析，研究氧對Vitreloy 105合金熱穩(wěn)定性及玻璃形成能力(GFA)影響的“全景效應”。結果發(fā)現(xiàn)，由于先析相的變化，氧對合金熱穩(wěn)定性及GFA具有不同的影響：在連續(xù)冷卻結晶過程中，氧致f.c.c.-Zr2Ni作為先析相時，氧降低合金的GFA；但是，在獲得玻璃態(tài)后的重新加熱晶化過程中，b.c.t.-Zr2Ni作為先析相時，氧具有抑制b.c.t.-Zr2Ni析出、提高合金熱穩(wěn)定性的作用。合金先析相的結構取決于結晶或晶化的動力學條件

    Abstract:

    A ‘panoramic effect’ of oxygen impurity on the thermal stability and GFA of Vitreloy 105 metallic glass was investigated based on the construction of TTT diagram and the kinetics analysis of primary phase precipitation. It was found that the oxygen impurity has different influences on the alloy’s thermal stability and GFA in the content range of 0.015 %~0.045 % (mass) because the primary phase was changed. The oxygen decreases the alloy’s GFA during continuously cooling crystallization for the oxygen-induced f.c.c.-Zr2Ni precipitates as the primary phase. However, the oxygen retards the precipitation of b.c.t.-Zr2Ni phase and enhances the alloy’s thermal stability during the reheating recrystallization of glassy alloy for the b.c.t.-Zr2Ni as the initial precipitation phase. The crystal structure of primary phases depends on the conditions for oxygen diffusion during the crystallization above nose temperature, Tn, and the recrystallization below Tn

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趙 裙,賀 林,江 峰,孫 軍.氧對Vitreloy 105金屬玻璃熱穩(wěn)定性的增強作用[J].稀有金屬材料與工程,2009,38(2):353~357.[Zhao Qun, He Lin, Jiang Feng, Sun Jun. Enhancement of Thermal Stability by Oxygen Impurity for Vitreloy 105 Metallic Glass[J]. Rare Metal Materials and Engineering,2009,38(2):353~357.]
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  • 收稿日期:2008-01-25
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