Experimental Study on the Radiation Shielding Effectiveness of Different Metal Substrate and Coating Combinations

GUO Fang; JIAN Mingzhe; ZHAO Dong; ZHENG Zhendong

doi:10.13919/j.issn.2095-6274.ZHJY202412034

Abstract：Objective This study evaluates the radiation shielding performance of different combinations of metal substrates and ceramic coatings,focusing on the application potential of lead-free and low-lead ceramic coatings in radiation protection.The goal is to provide scientific evidence for the development of environmentally friendly and efficient radiation shielding materials.Methods Four metal substrates of aluminum,copper,stain-less steel and titanium were selected with lead-free,lead-free,composite and nano-ceramic coatings,and the sam-ples were prepared by spraying method.The transmission dose rate(I)and photon attenuation rate(μ)of different materials were measured under 80 kV,120 kV,160 kV X-ray and 137Cs y-ray conditions,respectively.Lead equiv-alent was calculated to evaluate the shielding effect,and Pearson correlation analysis was performed to determine the linear relationship between the data.Results At 80 kV X-ray conditions,there is a positive correlation be-tween I and μ in most samples,and a strong positive correlation between lead equivalent and μ.Under the condition of 120 kV X-ray,the I values of B2 and C2 of lead-free ceramic coating samples are both low,520 μSv/h and 510μSv/h,respectively,while the μ values of both samples are high,0.70 mm 1 and 0.72 mm-1,respectively,indi-cating that the shielding properties of lead-free ceramic coating samples are strong.However,the I of low-lead ceramic coating sample D1 is the highest,reaching 710 μSv/h,μ is 0.35 mm-1,and lead equivalent is 0.23 mmPb,indicating poor attenuation effect.Under the condition of 160 kV X-ray,I of all samples is generally higher,and the correlation coefficient is concentrated between 0.60 and 0.79,indicating that all samples show higher I and μ,and the increase of μ directly affects the increase of I.In the 137Cs y-ray condition,the I of y-rays is generally lower and the μ is generally higher than that of X-rays.Under 137Cs γ-ray conditions,the I,μ and Pb equivalent of B2 are 500 μSv/h,0.76 mm 1 and 0.50 mmPb respectively,indicating that B2 has strong attenuation to y-rays.In con-trast,the low-lead ceramic coating sample D1 has an I of 690 μSv/h,a μ of 0.40 mm-1,and a lead equivalent of 0.26 mmPb,indicating better y-ray transmission and weak attenuation effect.Conclusion Lead-free ceramic coatings show superior radiation protection ability under experimental conditions,especially the shielding effect of high-en-ergy X-rays and y-ray is better than that of traditional low-lead coatings.