毛杰,宋进兵,邓畅光,黄科.氧化铝涂层的超音速等离子喷涂参数影响及硬度分析[J].表面技术,2014,43(4):110-114,141.
MAO Jie,SONG Jin-bing,DENG Chang-guang,HUANG Ke.Parameter Effect and Microhardness Analysis of Al2 O3 Coatings Prepared by the Supersonic Plasma Spraying Technique[J].Surface Technology,2014,43(4):110-114,141 |
| 氧化铝涂层的超音速等离子喷涂参数影响及硬度分析 |
| Parameter Effect and Microhardness Analysis of Al2 O3 Coatings Prepared by the Supersonic Plasma Spraying Technique |
| 投稿时间：2014-03-24 修订日期：2014-05-09 |
| DOI： |
| 中文关键词: 超音速等离子喷涂 Al2O3 涂层 喷涂参数 显微结构 工艺优化 显微硬度 |
| 英文关键词:supersonic atmosphere plasma spraying Al2 O3 coating spraying parameters microstructure process optimization microhardness |
| 基金项目:国际科技合作项目(2011DFB50030) ;广东省引进创新科研团队计划(2011C007) |
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| 中文摘要: |
| 目的 初步明确超音速等离子喷涂参数对涂层的影响规律,优化工艺参数。 方法 采用超音速等离子喷涂技术制备 Al2O3 陶瓷涂层,对涂层进行表征,分析喷涂电流 I、等离子发生气体压力 Pair、喷距 d对涂层显微结构的影响。 基于涂层显微硬度 HV 设计工艺优化试验,建立喷涂参数与显微硬度之间的回归方程。 结果 I = 260 A 或 Pair= 0 . 55 MPa 时,涂层是 α-Al2O3 和 γ-Al2O3 双相复合结构;I = 340 A 或 Pair=0 . 35 MPa 时,涂层几乎全由 γ-Al2O3 相组成,基本不含有未熔颗粒;喷距变化对涂层相组成的影响不显著。 I 或 d 增大,或者 Pair 降低,显微硬度都呈增大趋势。 结论 在实验范围内,超音速等离子喷涂 Al2O3涂层的显微硬度最优工艺是:Pair= 0 . 35 MPa,I = 340 A,d = 230 mm。 |
| 英文摘要: |
| Objective To preliminarily clarify the effect of parameters on coatings in supersonic plasma spraying and to obtain the optimal process parameters. Methods Al2 O3 ceramic coatings were prepared by the supersonic plasma spraying technique. The microstructure and properties of Al2 O3 coating were characterized and the effect of spraying parameters such as spraying current, pressure of plasma gas and spray distance were also discussed. According to the response surface methodology, the optimization experiment with three factors and three levels was designed and the regression equation was established between the influencing factors and the response value, thickness. Results When I = 260 A or Pair = 0. 55 MPa, the coating was a dual-phase composite structure consisting of α-Al2 O3 and γ-Al2 O3 . When I = 340 A or Pair = 0. 35 MPa, the coating was almost fully deposited into the γ-Al2 O3 phase, substantially containing no unmelted particles. Change in spraying distance had no significant effect on the phase composition of the coating. When I or d increased or Pair reduced, HV tended to increase. Conclusion In the experimental range, the optimal process parameters for microhardness of supersonic plasma spray were Pair = 0. 35 MPa, I = 340 A and d = 230 mm. |
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