铍材热扩散系数测定的影响因素  

Study on the influencing factors of thermal diffusion coefficient of beryllium material

作　　者：张子富 李美岁 张健康 李志年 黄旭刚 李树荣 ZHANG Zifu;LI Meisui;ZHANG Jiankang;LI Zhinian;HUANG Xugang;LI Shurong(State Key Laboratory of Special Rare Metal Materials,Northwest Rare Metal Materials Research 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试验室,宁夏石嘴山753000

出　　处：《粉末冶金工业》2024年第5期100-104,共5页Powder Metallurgy Industry

基　　金：国家重点研发计划资助项目(2021YFC 2902304)

摘　　要：试验研究了试样厚度、加热温度和喷碳层对铍材热扩散系数的影响。结果表明:试样厚度在2~6 mm范围之间所侧的热扩散系数趋于一致,厚度2 mm左右多次测试的标准偏差最小,测试结果更为精确,推荐该厚度为铍材热扩散系数测定的试样厚度。铍材热扩散系数随加热温度的升高而逐渐降低,当温度从25℃升到900℃时,热扩散系数降低了77.9%。不同的喷碳层情况下,测试的热扩散系数有显著的差异,试样表面喷覆薄而均匀的石墨时所测得热扩散系数据波动较小,数据一致性较好。The influence of sample thickness,heating temperature,and carbon spray layer on the thermal diffusion coefficient of beryllium material was studied.The results indicate that the thermal diffusion coefficient on the side of the sample with a thickness ranging from 2 mm to 6 mm tends to be consistent.The standard deviation of multiple tests with a thickness of about 2 mm is the smallest,and the test results are more accurate.It is recommended to use this thickness as the sample thickness for measuring the thermal diffusion coefficient of beryllium materials.The beryllium coefficient gradually decreased with the heating temperature by 77.9%when the temperature increased from 25℃to 900℃.Under different cases of carbon spray layer,the thermal diffusivity tested is significantly different,and the thermal diffusive coefficient measured on the test sample surface is coated with thin and uniform graphite.

关 键 词：铍材 热扩散系数 试样厚度 加热温度 喷碳层 

分 类 号：TG146.24[一般工业技术—材料科学与工程]