引用本文:刘林涛， 李争显， 华云峰， 杜继红， 杨晨曦， 宗洋洋.热处理气氛对ZrO2活性扩散障/NiCrAl涂层界面反应的影响[J].中国表面工程,2015,28(2):53~58
LIU Lintao, LI Zhengxian, HUA Yunfeng, DU Jihong, YANG Chenxi, ZONG Yangyang.Influences of Heat Treatment Atmosphere on Interface Reaction of ZrO2 Active Diffusion Barrier and NiCrAl Coating[J].China Surface Engineering,2015,28(2):53~58
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热处理气氛对ZrO2活性扩散障/NiCrAl涂层界面反应的影响
刘林涛， 李争显， 华云峰， 杜继红， 杨晨曦， 宗洋洋1,2,3
1. 西安建筑科技大学 冶金工程学院， 西安 710016;2. 西北有色金属研究院 腐蚀与防护研究所， 西安 710043;3. 东北大学 材料与冶金学院， 沈阳 110819
摘要:
为研究ZrO2活性扩散障的形成机制，采用电子束物理气相沉积技术(EBPVD)在DD5镍基高温合金表面分别沉积ZrO2先驱层与NiCrAl涂层，分别在真空条件和大气条件下对试样进行温度为700，800及900 ℃，时间为5 h的高温热处理。分析了试样的截面形貌、扩散反应区厚度以及ZrO2/NiCrAl涂层界面处的元素分布，并研究了热处理气氛对ZrO2/NiCrAl涂层界面反应的影响。结果表明：真空条件更有益于界面反应的进行，并发现经过900 ℃热处理5 h后，ZrO2活性扩散障/NiCrAl涂层界面之间形成了致密的Al2O3阻挡层；而在大气气氛下，NiCrAl涂层中部分Al元素向表面扩散形成氧化膜，从而影响了ZrO2/NiCrAl涂层的界面反应。
关键词:  界面反应  元素扩散  NiCrAl涂层  扩散障
DOI：10.11933/j.issn.1007-9289.2015.02.004
分类号:
基金项目:
Influences of Heat Treatment Atmosphere on Interface Reaction of ZrO2 Active Diffusion Barrier and NiCrAl Coating
LIU Lintao, LI Zhengxian, HUA Yunfeng, DU Jihong, YANG Chenxi, ZONG Yangyang1,2,3
1. School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710016;2. Institute of Corrosion and Protection, Northwest Institute for Nonferrous Metal Research, Xi’an 710043;3. College of Material and Metallurgy, Northeastern University, Shenyang 110819
Abstract:
ZrO2 ceramic film and NiCrAl coating were respectively deposited on DD5 Nibased supper alloy by electron beam physical vapor deposition (EBPVD) to investigate the formation of ZrO2 active diffusion barrier. The specimens were heat treated under 700, 800 and 900 ℃ for 5 h in both vacuum and atmospheric conditions. By comparing the cross section morphology, the thickness of the diffusionreaction zones and the element nearby the interface of ZrO2/NiCrAl, the influences of the interface reaction between the ZrO2 active diffusion barrier and the NiCrAl coating under different heat treatment conditions were investigated. The results indicate that the vacuum condition is more conducive to the interfacial reaction, and after 900 ℃/5 h vacuumtreated, a continued and dense Al2O3diffusion barrier forms on the interface of ZrO2/NiCrAl. However, a portion of Al element in NiCrAl coating is diffused to the surface to form the oxidation scale under heat treatment in the atmospheric condition, which would damage the interface reaction between ZrO2 and NiCrAl coatings.
Key words:  interface reaction  element diffusion  NiCrAl coating  diffusion barrier
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