等离子喷涂B4C涂层的抗辐射性能研究  

Anti-radiation behavior of plasma sprayed boron carbide coatings

作　　者：李龙根[1] 徐志勇[1] 钱浩[1] 

机构地区：[1]复旦大学附属肿瘤医院放射物理研究室,上海200032

出　　处：《中华放射肿瘤学杂志》2009年第2期149-151,共3页Chinese Journal of Radiation Oncology

基　　金：上海市自然科学基金资助项目（044119708）

摘　　要：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0．1mm厚度B4C涂在16号锰钢上，研究它对加速器产生的6、10、15MV高能射线，6、9、12、15MeV高能电子线，^60Coγ线和快中子辐射的防护作用。同时将0．1mmB4C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^60Coγ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。0．1mm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。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 MV 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 kilovohage X-ray machine. Results Anti-radiation capacity of plasma sprayed boron carbide coatings was not found for X-ray beams emitted by accelerator and ^60 Co 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 kilovohage X-ray machine, the anti-radiation was good, and only 0.1 mm plasma sprayed boron carbide had 15% attenuation. Conclusions The plasma sprayed boron carbide coatings have the anti-radiation capacity for X-ray emitted by kilovohage X-ray machine in medical field.

关 键 词：等离子喷涂 碳化硼涂层 辐射防护 

分 类 号：R686[医药卫生—骨科学]