γ射线辐照对机械密封用烧结材料性能的影响
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摘要
使用不同剂量γ射线对拟用于核电领域机械密封的3种热压烧结材料进行辐照处理,测试了不同辐照条件下材料的热物理性能和力学性能.使用Plint TE-92摩擦磨损试验机模拟机械密封实际工况进行盘-盘摩擦试验,测试了相同材料自配副的摩擦磨损性能,并采用扫描电子显微镜(SEM)和ZYGO白光干涉仪等表征分析方法,研究了辐照条件对材料微观组织形貌和摩擦磨损机理的影响.结果表明:本文中γ射线辐照剂量对烧结材料的组织形貌和物理、力学性能影响较小.在水润滑条件下,烧结材料自配副的摩擦系数为0.04～0.06,没有出现明显的磨损情况,辐照对材料的摩擦磨损性能没有明显影响.
The sintering materials prepared by hot pressing were irradiated by Gamma ray at different dose rates. These materials were composite ceramics commonly used in mechanical seals equipped in the rotating machineries of nuclear power plant. The thermal and mechanical properties were measured. The friction experiments were also carried out under water lubrication at room temperature by a Plint TE-92 tribo-machine. The morphology of the worn surfaces was observed using scanning electron microscopy and ZYGO. The results show that γ irradiation had little effect on the thermal and mechanical properties of the sintering materials. Mild wear occurred during the friction experiments with friction coefficients of 0.04～0.06 under water lubrication. Irradiation had little effect on the friction property of the sintering materials.
The sintering materials prepared by hot pressing were irradiated by Gamma ray at different dose rates. These materials were composite ceramics commonly used in mechanical seals equipped in the rotating machineries of nuclear power plant. The thermal and mechanical properties were measured. The friction experiments were also carried out under water lubrication at room temperature by a Plint TE-92 tribo-machine. The morphology of the worn surfaces was observed using scanning electron microscopy and ZYGO. The results show that γ irradiation had little effect on the thermal and mechanical properties of the sintering materials. Mild wear occurred during the friction experiments with friction coefficients of 0.04～0.06 under water lubrication. Irradiation had little effect on the friction property of the sintering materials.
引文
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[5]Hai Wanxiu,Chen Hao,Lu Jinjun,et al.Influences of velocity,load and counterpart material on the tribological behavior of ZrB2-SiCcomposites[J].Tribology,2017,37(5):581-586(in Chinese)[海万秀,陈浩,吕晋军,等.不同配副下ZrB2-SiC复相陶瓷的摩擦学性能[J].摩擦学学报,2017,37(5):581-586].doi:10.16078/j.tribology.2017.05.003.
[6]Xiao Qidan,Liu Linchao,Wu Shan.Friction and wear characteristics of Ti3SiC2/TiC composites by reactive sintering[J].Tribology,2015,35(4):462-469(in Chinese)[肖琪聃,刘林超,吴珊.反应烧结Ti3SiC2/TiC复合材料摩擦磨损性能研究[J].摩擦学学报,2015,35(4):462-469].doi:10.16078/j.tribology.2015.04.015.
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[9]Idris M I,Konishi H,Imai M,et al.Neutron irradiation swelling of SiC and SiC/SiC for advanced nuclear applications[J].Energy Procedia,2015,71:328-336.doi:10.1016/j.egypro.2014.11.886.
[10]Konishi H,Idris M I,Imai M,et al.Neutron irradiation effects of oxide sintering additives for SiC/SiC composites[J].Energy Procedia,2015,71:306-312.doi:10.1016/j.egypro.2014.11.883.
[11]Koyanagi T,S Kondo,T Hinoki.The influence of sintering additives on the irradiation resistance of NITE SiC[J].Journal of Nuclear Materials,2011,417:435-439.doi:10.1016/j.jnucmat.2010.12.181.
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