基于激光闪射法测量Zr基非晶合金的导热系数-中国材料进展

文章信息/Info

Title:: Measurement of Thermal Conductivity of Zr-Based Bulk Metallic Glass by Laser Flash Method

Author(s):: ZHANG Zhenwei; JIANG Rui; ZHU Yujin; GUO Weimin; ZHAO Jie; CHEN Yun; LI Yulei; DING Boyuan; (Ningbo Branch of Chinese Academy of Ordnance Science, Ningbo 315103, China)

Keywords:: laser flash method; thermal conductivity; specific capacity; thermal diffusivity; Zr-based bulk metallic glass

摘要:: 激光闪射法是目前较普遍采用的测量材料导热系数的方法，介绍了激光闪射法测量热扩散系数与导热系数的原理，通过NETZSCH LFA467 HT HyperFlash型激光法导热仪，采用不同标准样品参比在不同温度下对Zr基非晶合金热扩散系数和导热系数进行了研究。结果表明：在相同标准样品参比下，Zr基非晶合金的热扩散系数随着温度升高逐渐增大；同一温度下，在不同标准样品参比下Zr基非晶合金的热扩散系数相同；在相同的温度下，Cu标准样品参比下Zr基非晶合金导热系数值最小，9606标准样品参比下导热系数值最高，310标准样品参比下导热系数值介于两者之间；在相同标准样品参比下，Zr基非晶合金的导热系数值随着温度的升高逐渐增大；选用Cu标准样品作为参比样品测量Zr基非晶合金导热系数更精确。

Abstract:: Laser flash method is widely used to measure thermal conductivity at present. In this paper, the principle of laser flash method for measuring thermal diffusivity and thermal conductivity is introduced firstly. The thermal diffusivity and thermal conductivity of Zr-based bulk metallic glass at different temperatures under different referenced standard samples are studied. The results show that: the thermal diffusivity of zirconium-based metallic glass increases gradually with the increase of temperature under the same referenced standard sample; at the same temperature, the thermal diffusivity measured under different referenced standard samples is the same; at the same temperature, the thermal conductivity is the lowest under Cu standard referenced sample, is the highest under 9606 standard referenced sample, is between the above two results under 310 standard referenced sample; the thermal conductivity of Zr based amorphous alloy increases with the increase of temperature. For measuring the thermal conductivity of zirconium-based metallic glass by laser flash method, using Cu standard sample as the reference is more accurate.