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