MoSi2和(Mo,W)Si2涂层的宽温域氧化过程

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毛绍宝^1,2，杨英²，李海庆³，张世宏^1,2*

1. 安徽工业大学材料科学与工程学院，安徽马鞍山 2430022. 安徽工业大学现代表界面工程研究中心，安徽马鞍山 2430023. 中国运载火箭技术研究院航天材料及工艺研究所，北京 100076

收稿日期:2018-11-10修回日期:2019-01-18出版日期:2019-08-22发布日期:2019-08-15
通讯作者:张世宏

基金资助:自修复硅氧烷/NiAl-NiCr-Cr3C2多层梯度复合涂层结构调控及荷温耦合作用失效机理研究

Oxidation processes of MoSi₂ and (Mo,W)Si₂ coatings in wide temperature range

Shaobao MAO^1,2, Ying YANG², Haiqing LI³, Shihong ZHANG^1,2*

1. School of Material Science and Engineering, Anhui University of Technology, Ma?anshan, Anhui 243002, China2. Research Center of Modern Surface and Interface Engineering, Anhui University of Technology, Ma?anshan, Anhui 243002, China3. Aerospace Research Institute of Materials & Processing Technology, China Academy of Launch Vehicle Technology, Beijing 100076, China

Received:2018-11-10Revised:2019-01-18Online:2019-08-22Published:2019-08-15

Supported by:Structural modulation and influencing mechanism of both load and temperature of self-repairing silicone/NiAl-NiCr-Cr3C2 multilayer gradient composite coatings

摘要/Abstract

摘要： 采用包渗法在Mo及Mo?W基体上分别制备MoSi2及(Mo,W)Si2涂层，研究了W掺杂对MoSi2涂层抗氧化性能的影响规律和作用机理。结果表明，W元素固溶到MoSi2涂层中，形成(Mo,W)Si2固溶体，涂层微观结构更加致密化。在1600℃高温下静态氧化，(Mo,W)Si2涂层抗氧化失效时间长达70 h，1200℃下氧化1000 h仍具有良好的防护性能，抗氧化性能大幅提升。加入W元素阻碍了Si元素与基体间的扩散反应，降低了涂层中Si元素的消耗速率，显著增强了(Mo,W)Si2涂层抗高温氧化性能。在500℃低温下静态氧化50 h，与MoSi2涂层相比，(Mo,W)Si2涂层氧化产生明显的“Pest”现象，涂层严重粉化失效。加入W元素降低了涂层中Si元素的扩散速率，导致低温下涂层表面无法形成致密氧化层，加剧涂层的快速氧化。

引用本文

毛绍宝杨英李海庆张世宏. MoSi₂和(Mo,W)Si₂涂层的宽温域氧化过程[J]. 过程工程学报, 2019, 19(4): 826-835.
Shaobao MAO Ying YANG Haiqing LI Shihong ZHANG. Oxidation processes of MoSi₂ and (Mo,W)Si₂ coatings in wide temperature range[J]. Chin. J. Process Eng., 2019, 19(4): 826-835.

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