2;封嚴涂層;抗沖刷;火焰噴涂"/> 2可磨耗封嚴涂層,采用SiO2對NiCrFeAl/h-BN進行改性,改善涂層的可磨耗性。采用不同氧氣/乙炔流量比(氧燃比)制備可磨耗封嚴涂層,并對涂層抗沖刷性能進行評價。結(jié)果顯示：NiCrFeAl在噴涂過程中熔化并包覆h-BN和SiO2粒子；隨氧燃比的升高,金屬相熔化更加充分,h-BN和SiO2粒子在涂層中分布的均勻性提高,涂層表面洛氏硬度由50.8 HR15Y提高到70.3 HR15Y,結(jié)合強度升高；涂層沖刷后形貌表現(xiàn)出粘著磨損和磨粒磨損特征,沖刷表面粗糙度隨氧燃比升高而降低,金屬相對非金屬相的充分包裹提高了涂層的內(nèi)聚力,涂層質(zhì)量損失降低,抗沖刷性能提高。"/>

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NiCrFeAl/h-BN.SiO2可磨耗封嚴涂層抗沖刷性能研究
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中國科學(xué)院金屬研究所師昌緒先進材料創(chuàng)新中心

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中圖分類號:

TG178

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裝備預(yù)研(項目號6142703190303)


Anti-erosion performance of NiCrFeAl/h-BN.SiO2 abradable sealing coatings
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Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences

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    摘要:

    利用METCO 6P-Ⅱ火焰噴涂制備NiCrFeAl/h-BN.SiO2可磨耗封嚴涂層,采用SiO2對NiCrFeAl/h-BN進行改性,改善涂層的可磨耗性。采用不同氧氣/乙炔流量比(氧燃比)制備可磨耗封嚴涂層,并對涂層抗沖刷性能進行評價。結(jié)果顯示：NiCrFeAl在噴涂過程中熔化并包覆h-BN和SiO2粒子；隨氧燃比的升高,金屬相熔化更加充分,h-BN和SiO2粒子在涂層中分布的均勻性提高,涂層表面洛氏硬度由50.8 HR15Y提高到70.3 HR15Y,結(jié)合強度升高；涂層沖刷后形貌表現(xiàn)出粘著磨損和磨粒磨損特征,沖刷表面粗糙度隨氧燃比升高而降低,金屬相對非金屬相的充分包裹提高了涂層的內(nèi)聚力,涂層質(zhì)量損失降低,抗沖刷性能提高。

    Abstract:

    The NiCrFeAl/h-BN.SiO2 abradable sealing coatings were prepared by METCO 6P-Ⅱ flame spraying. With the addition of SiO2, the abradability of the NiCrFeAl/h-BN coatings are improved. The anti-erosion performance of the abradable sealing coatings prepared with different flow-ratios of oxygen and acetylene (oxygen-acetylene ratio) were researched. The results show that the h-BN and SiO2 particles are coated by NiCrFeAl during the spraying process. The metal phase adequately melted with the increase of oxygen-acetylene ratio, and the distribution of h-BN and SiO2 are more homogenous. The Rockwell superficial hardness was raised from 50.8 HR15Y to 70.3 HR15Y, and the bonding strength was improved. The morphology of the wear tracks was characterized by adhesive wear and abrasive wear, and the roughness decreases with the increasing oxygen-acetylene ratio. The cohesive force of the coating was promoted deriving from the nonmetallic phase was coated by metal phase almost fully. The weight loss rate of the coatings decreases, and the anti-erosion performance are improved.

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欒勝家,高明浩,徐娜,常輝,王遠鴻,周恬伊,張甲,侯萬良,常新春. NiCrFeAl/h-BN. SiO2可磨耗封嚴涂層抗沖刷性能研究[J].稀有金屬材料與工程,2022,51(6):2115~2121.[Luan Shengjia, Gao Minghao, Xu Na, Chang Hui, Wang Yuanhong, Zhou Tianyi, Zhang Jia, Hou Wanliang, Chang Xinchun. Anti-erosion performance of NiCrFeAl/h-BN. SiO2 abradable sealing coatings[J]. Rare Metal Materials and Engineering,2022,51(6):2115~2121.]
DOI：10.12442/j. issn.1002-185X.20210506

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  • 收稿日期:2021-06-10
  • 最后修改日期:2021-08-05
  • 錄用日期:2021-08-27
  • 在線發(fā)布日期: 2022-07-06
  • 出版日期: 2022-06-29