闪光法测量粉末冶金铍材热物理参数的结果不确定度评定  

Evaluation of uncertainty in the results of measuring thermophysical parameters of powder metallurgy beryllium materials by flash method

作　　者：张子富 李美岁 张健康 黄旭刚 李志年 李树荣 ZHANG Zifu;LI Meisui;ZHANG Jiankang;HUANG Xugang;LI Zhinian;LI Shurong(State Key Laboratory of Special Rare Metal Material,Northwest Rare Metal Materials Institute Ningxia Co.,Ltd.,Shizuishan 753000,China)

机构地区：[1]西北稀有金属材料研究院宁夏有限公司稀有金属特种材料国家重点实验室,石嘴山753000

出　　处：《理化检验（物理分册）》2023年第9期13-15,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：利用闪光法测量粉末冶金铍材的热扩散系数、比热容、导热系数等热物理参数,分析了影响热物理参数测量不确定度的来源,并对粉末冶金铍材热物理参数测量不确定度进行评定。结果表明:在置信度95%的条件下,粉末冶金铍材热扩散系数的扩展不确定度为1.48 mm^(2)/s,比热容的扩展不确定度为0.07 J/(kg·K),导热系数的扩展不确定度为5.80 W/(m·K)。The flash method was used to measure the thermal diffusion coefficient,specific heat capacity,thermal conductivity and other thermophysical parameters of powder metallurgy beryllium materials.The sources of uncertainty in the measurement of thermophysical parameters were analyzed,and the uncertainty in the measurement of thermophysical parameters of powder metallurgy beryllium materials was evaluated.The results show that at a confidence level of 95%,the expanded uncertainty of the thermal diffusion coefficient of powder metallurgy beryllium material was 1.48 mm^(2)/s,the expanded uncertainty of the specific heat capacity was 0.07 J/(kg·K),and the expanded uncertainty of the thermal conductivity coefficient was 5.80 W/(m·K).

关 键 词：闪光法 粉末冶金铍材 热扩散系数 比热容 导热系数 不确定度 

分 类 号：TB31[一般工业技术—材料科学与工程] TB941[一般工业技术—计量学]