等离子喷涂B4C涂层的抗辐射性能研究

目的 研究用等离子技术喷涂的碳化硼(B4C)涂层的抗辐射能力.方法 将0.1 mm厚度B4C涂在16号锰钢上,研究它对加速器产生的6、10、15 MV高能射线,6、9、12、15 MeV高能电子线,60Co γ线和快中子辐射的防护作用.同时将0.1 mm B4C涂在纸板上,研究它对深部X线机的X线辐射的防护作用.结果 等离子喷涂制备B4C涂层对高能X线和60Co γ线没有防护作用.对电子线有一定防护作用,且随深度的增加有增大趋势,但作用不大.对快中子有较大防护作用.对深部X线机X线有防护作用,防护能力较强.0.1 mm厚的涂层就可带来15%的衰减.结论 用等离子技术喷涂的B4C涂层可在医学领域用来防护千伏级射线.

Anti-radiation behavior of plasma sprayed boron carbide coatings

Objective To study anti-radiation behavior of plasma sprayed boron carbide coatings. Methods The anti-radiation capacity of 16Mn steel which was coated with 0.1 mm plasma sprayed boron carbide were studied. The irradiation beams were 6,10,15 MY X-ray and 6,9,12,15 MeV electron emitted by accelerator, X-ray emitted by 60Co machine,fast neutron, and X-ray emitted by kilovoltage X-ray ma-chine. Results Anti-radiation capacity of plasma sprayed boron carbide coatings was not found for X-ray beams emitted by accelerator and 60Co machine. For electron beams,the anti-radiation capacity were found. The deeper of location, the stronger was anti-radiation. However, the anti-radiation capacity was not good. For fast neutron,the anti-radiation capacity was good. For X-ray emitted by kilovoltage X-ray machine,the anti-radiation was good,and only 0.1 nun plasma sprayed boron carbide had 15% attenuation. Conclusions The plasma sprayed boron carbide coatings have the anti-radiation capacity for X-ray emitted by kilovoltage X-ray machine in medical field.