用精密电阻测量、DSC和X射线衍射分析,研究了非晶态Ni-Zr合金在低于T_c的保温过程中的氧化和晶化.其氧化表现为Zr的选择氧化,它降低Ni_(65)Zr_(35)表面层的热稳定性、提高Ni_(37)Zr_(63)表面层的热稳定性.对这种现象发生的原因进行了讨论.
Oxidation and crystallization behaviours of three Ni-Zr amorphous alloys have been studied during isothermal annealing at the temperatures below their crystallization temperature by means of electrical resistance measurement, differential scanning calorimetery and X-ray diffraction. Selective oxidation of Zr has been found in these alloys. As a consequent, it increase the thermal stability of surface layer constructed by Ni_(37)Zr_(63) but decreases that constructed by Ni_(65)Zr_(35). The reason of this effect has also been discussed.
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