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.]
等离子喷涂制备MoSi<sub>2</sub>-CoNiCrAlY复合涂层的高温氧化行为
投稿时间:2018-07-17  修订日期:2018-08-08
中文关键词:  等离子喷涂  MoSi<  sub>  2<  /sub>  -CoNiCrAlY  GH4169合金  纳米复合  循环氧化
基金项目:广东省自然科学基金资助(项目号:2016A030313450 )
中文摘要:
      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。
Oxidation Behavior of MoSi&lt;sub&gt;2&lt;/sub&gt;-CoNiCrAlY Composite Coating Prepared by Plasma Spraying
英文关键词:plasma spraying  MoSi<sub>2</sub>-CoNiCrAlY  GH4169 alloy  nanocomposite coating  cycle oxidation
英文摘要:
      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>.
作者单位E-mail
焦东玲 华南理工大学材料科学与工程学院 dljiao@scut.edu.cn 
钟喜春 华南理工大学材料科学与工程学院  
许文勇 北京航空材料研究所 先进高温结构材料国家重点实验室  
邱万奇 华南理工大学材料科学与工程学院  
刘名涛 华南理工大学材料科学与工程学院  
刘仲武 华南理工大学材料科学与工程学院  
李周 北京航空材料研究所 先进高温结构材料国家重点实验室  
张国庆 北京航空材料研究所 先进高温结构材料国家重点实验室  
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