【摘要】 以结晶Zr棒及海绵Zr为原材料、利用浇包型坩埚电弧炉倾斜铸造法制备了不同氧杂质含量的Zr_52．5Cu_17．9Ni_14．6Al₁₀Ti₅块体非晶合金楔形试样,研究了氧对合金玻璃形成能力及热稳定性的影响,结果表明：氧杂质虽然降低合金以最大非晶形成厚度t_max为表征的玻璃形成能力,却提高合金以过冷液相区温度范围△T_x1为表征的热稳定性,氧杂质具有提高合金开始晶化表观激活能E_ax1的趋势。更多还原

【Abstract】 Crystal Zr bar and sponge Zr were employed as raw materials to prepare wedge-like specimens of Zr_52.5 Cu_17.9 Ni_14.6 Al₁₀ Ti₅ bulk amorphous alloy with different oxygen impurity contents by a tilt casting method using ladle hearth type arc furnace.Effects of oxygen impurity on the alloy’s glass forming ability and thermal stability were investigated.It is shown that the glass forming ability of the quinary alloy characterized by maximum amorphous sample forming thickness t_max was decreased as oxygen impurity content increased, on the contrary, its thermal stability characterized by supercooled liquid region ΔT_x1 was enhanced.Oxygen impurity has the tendency to heighten the apparent activation energy E_ax1 for the crystallization process onset of the amorphous alloy, which made the crystallization incubation period of the alloy under larger supercooled state lengthened and thereby the thermal stability enhanced.更多还原