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
张子富 1李美岁 1张健康 1李志年 1黄旭刚 1李树荣1
作者信息
- 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
- 折叠
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.
Abstract
The influence of sample thickness,heating temperature,and carbon spray layer on the thermal diffu-sion 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 devi-ation 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Key words
beryllium material/thermal diffusion coefficient/sample thickness/heating temperature/carbon spray layer引用本文复制引用
出版年
2024
NETL
NSTL
万方数据