A Thermodynamic Study on the Crystallization Processes of Amorphous (Fe0.99,Mo0.01)78Si9B13 Alloy under High Pressrue
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摘要: 在600~930 K，常压到7 GPa的范围内，对非晶(Fe0.99,Mo0.01)78Si9B13合金等温等压退火30 min。实验表明：其晶化产物-Fe(Mo, Si)、Fe3B和Fe2B相的析出与所加压力密切相关。压力使非晶(Fe0.99,Mo0.01)78Si9B13合金的晶化温度和亚稳Fe3B相的析出温度下降，在一定的压力和温度下，亚稳Fe3B相将向稳定Fe2B相转变，其转变温度随压力而变化。还对非晶(Fe0.99,Mo0.01)78Si9B13合金的晶化和亚稳Fe3B到稳定Fe2B转变的热力学机制进行了讨论，并给出Fe3B向Fe2B的相转变方程。Abstract: Amorphous (Fe0.99,Mo0.01)78Si9B13 alloys were annealed for 30 min at a temperature between 600 K and 930 K under pressures of normal pressure to 7 GPa. It was found that precipitation temperature of their crystallization products of -Fe(Mo,Si), Fe3B and Fe2B alloys are related closely to the pressure used. Crystallization temperature of amorphous alloy and precipitation temperature of the metastable phase Fe3B decrease with increasing pressure at the present pressure condition. At certain temperature and pressure, the Fe3B alloy will transform into a stable phase Fe2B and its transition temperature changes with pressure. A thermodynamic mechanism on the crystallization of the amorphous (Fe0.99,Mo0.01)78Si9B13 alloy and the phase transition of the Fe3B to the Fe2B was discussed, and an equation of the phase transition from the Fe3B to the Fe2B was given.
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Key words:
- high pressure /
- crystallization /
- phase transition
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