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首页 > 过刊浏览>2019年第48卷第4期 >1135-1141. DOI:10.12442/j.issn.1002-185X.20180767
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等离子喷涂制备MoSi<sub>2</sub>-CoNiCrAlY复合涂层的高温氧化行为
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作者单位:

1.华南理工大学材料科学与工程学院;2.北京航空材料研究所 先进高温结构材料国家重点实验室

基金项目:

广东省自然科学基金资助(项目号：2016A030313450 )


Oxidation Behavior of MoSi<sub>2</sub>-CoNiCrAlY Composite Coating Prepared by Plasma Spraying
Author:
Affiliation:

1.School of Materials Science and Engineering,South China University of Technoloty;2.Scicence and Technology on Advance High Temperature Structure Materials Laboratory,Beijing Institute of Aeronautical Materials

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    摘要:

    以高能球磨法制备的纳米MoSi<sub>2</sub>-CoNiCrAlY复合粉末为喷涂材料,利用等离子喷涂技术在GH4169合金表面沉积了MoSi<sub>2</sub>-CoNiCrAlY复合涂层,并研究了GH4169基材和复合涂层合金试样在900°C静态大气环境下的循环氧化行为。结果表明：复合涂层表现出较好的抗高温氧化性能,其氧化速率仅为1.23×10<sub>-7</sub> mg<sub>2</sub>.cm<sub>-4</sub>.s<sub>-1</sub>,这归因于MoSi<sub>2</sub>在氧化早期形成了SiO<sub>2</sub>相,可以自封氧化膜。氧化后期SiO<sub>2</sub>的脱落,Mo<sub>5</sub>Si<sub>3</sub>相的再次氧化生成MoO<sub>3</sub>和MoO<sub>2</sub>气相,以及MoSi<sub>2</sub>的内氧化直接气化,会降低涂层的抗氧化性能。

    Abstract:

    MoSi<sub>2</sub>-CoNiCrAlY composite coatings were deposited on GH4169 alloy with ball milled nanocrystalline powders by plasma spraying technology. Cycle oxidation behavior of coated and uncoated GH4169 alloy at 900℃ in static air was investigated. The results showed that the composite coating exhibited good oxidation resistance at high temperature, and the oxidation rate was only 1.23×10<sub>-7</sub> mg<sub>2</sub>.cm<sub>-4</sub>.s<sub>-1</sub>, which was attributed to a self-sealing oxide film SiO<sub>2</sub> with excellent protective properties formed at the early stage by oxidation of MoSi<sub>2</sub>. The oxidation resistance of the coating would be reduced by the peeling of SiO<sub>2</sub> in the later period of oxidation and the reoxidation of Mo<sub>5</sub>Si<sub>3</sub> phase to generate MoO<sub>3</sub> and MoO<sub>2</sub> gas phase as well as the internal oxidation of MoSi<sub>2</sub>.

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焦东玲,钟喜春,许文勇,邱万奇,刘名涛,刘仲武,李周,张国庆.等离子喷涂制备MoSi<sub>2</sub>-CoNiCrAlY复合涂层的高温氧化行为[J].稀有金属材料与工程,2019,48(4):1135~1141.[Jiao Dongling, Zhong Xichun, Xu Wenyong, Liu Mingtao, Qiu Wanqi, Liu Zhongwu, Li Zhou, Zhang Guoqing. Oxidation Behavior of MoSi<sub>2</sub>-CoNiCrAlY Composite Coating Prepared by Plasma Spraying[J]. Rare Metal Materials and Engineering,2019,48(4):1135~1141.]
DOI：10.12442/j. issn.1002-185X.20180767

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  • 收稿日期:2018-07-17
  • 最后修改日期:2018-08-08
  • 录用日期:2018-08-09
  • 在线发布日期: 2019-05-13

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