期刊信息

  • 刊名： 河北师范大学学报（自然科学版）Journal of Hebei Normal University (Natural Science)
  • 主办： 河北师范大学
  • ISSN： 1000-5854
  • CN： 13-1061/N
  • 中国科技核心期刊
  • 中国期刊方阵入选期刊
  • 中国高校优秀科技期刊
  • 华北优秀期刊
  • 河北省优秀科技期刊

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强流脉冲电子束轰击粘结层表面微观形貌的研究

  • 中国民航大学 天津市民用航空器适航与维修重点实验室, 天津 300300
  • DOI： 10.13763/j.cnki.jhebnu.nse.2018.01.008

Study on Surface Microstructure of Bond Coat Irradiated by High Current Pulsed Electron Beam

摘要/Abstract

摘要：

针对传统热障涂层在服役温度下容易失效的特点，采用大气等离子喷涂技术在镍基高温合金GH4169上制备CoCrAlY粘结层，并利用电子束蒸发镀膜技术在粘结层表面沉积一层纯铝薄膜，最后使用强流脉冲电子束对镀铝膜的粘结层表面进行轰击，制备了新型热障涂层.研究了新型热障涂层CoCrAlY粘结层表面改性后的微观结构.实验结果表明：CoCrAlY粘结层表面蒸镀Al膜并经强流脉冲电子束轰击后产生了Al相和Al2O3相，Co基氧化物消失；粘结层表面变得较为致密、均匀，粗糙度明显增大且分布着大量纳米尺寸的富氧化铝细泡，这些气泡可以有效提高热障涂层抗氧化性能.

Abstract：

According to the characteristic that the conventional thermal barrier coating is easy to lose its effectiveness in service temperature,a new thermal barrier coating has been prepared in this paper.CoCrAlY bond coat of thermal barrier coating is prepared by air plasma spray on Ni-based superalloy GH4169,and an aluminum thin film is further deposited on the surface of bond coat by electron beam evaporation and irradiated by high current pulsed electron beam.The microstructure of the new thermal barrier coating CoCrAlY bond coat with surface modification is investigated.Experimental results show that CoCrAlY bond coat is formed by evaporation of Al film and the high current pulsed electron beam,in which the Al and Al2O3 phases are produced and the Co-based oxide disappeare.Moreover,the surface of CoCrAlY bond coat becomes more compact and uniform,but the roughness increases obviously.There are large numbers of nano-scaled rich alumina bubbles,which could effectively improve the thermal barrier coating oxidation resistance.

关键词

关键词： CoCrAlY涂层 ; 铝薄膜 ; 电子束真空镀膜 ; 强流脉冲电子束 ; 微观结构
Key words： CoCrAlY coating ; aluminum film ; electron beam vacuum deposition ; high current pulsed electron beam ; microstructure

参考文献 15

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