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以Fe41Co7Cr15Mo14C15B6Y2非晶合金为基体,通过掺杂Co65 Cr15 Zr10W10非晶合金成功获得了低热导率的Fe基大块非晶合金.利用四探针电阻率测试仪和激光闪射热导率测试仪分别测量合金的室温电阻率和25～150℃下的热导率.研究Co65 Cr15Zr10W10非晶合金掺杂对电阻率和热导率的影响以及热导率随温度的变化关系.结果表明:在25 ～150℃范围内,Fe基大块非晶合金热导率随温度升高呈线性增加.Co65 Cr15Zr10W10非晶合金的掺杂导致Fe基大块非晶合金的热导率和电阻率降低,当掺杂含量高于10 at％后,热导率趋于稳定.掺杂主要引起常温下声子热导率的变化,对电子热导率影响很小.提出了通过晶化温度Tx推算Fe基大块非晶合金常温下热导率的公式,声子热导率与Tx之间的关系符合y=0.06756X-37.31568,总热导率与Tx之间的关系符合y =0.06228X-30.58814.

Fe-based bulk amorphous alloy with low thermal conductivity was successfully prepared by doping Co65Cr15Zr10W10 alloy in Fe41 Co7Cr15 Mo14C15 B6Y2 amorphous alloy.The thermal conductivity in the range of 25 to 150 ℃ and the electrical resistivity of Fe-based bulk amorphous alloy at room temperature were tested by laser flash thermal conductivity tester and four probe resistance tester respectively.The effect of the doping of Co65Cr15Zr10W10 amorphous alloy on the electrical resistivity and thermal conductivity,and the relationship between the temperature and the thermal conductivity were investigated,respectively.The results show that in the range of 25 to 150 ℃,the thermal conductivity of the Fe-based bulk amorphous alloy increases linearly with the increase of temperature.The thermal conductivity and the electrical resistivity of the Fe-based bulk amorphous alloy are decreased by doping Co65 Cr15 Zr10 W10 alloy.When the doping content is higher than 10 at％,the thermal conductivity tends to be stable.Doping mainly results in the change of phonon thermal conductivity at room temperature,and the effect of doping on the electron thermal conductivity is very small.A formula for calculating the thermal conductivity of the Fe-based bulk amorphous alloy at room temperature is presented by using crystallization Tx,the relationship between phonon thermal conductivity and Tx is in linearity with Y =0.06756X-37.31568,the relationship between total thermal conductivity and Tx is in linearity with Y =0.06228X-30.58814.