Effect of Si additions on the Al2O3 grain refinement upon oxidation of Cr2AlC MAX phase
Effect of Si additions on the Al2O3 grain refinement upon oxidation of Cr2AlC MAX phase
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DOI：
10.1016/j.jeurceramsoc.2016.11.050
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发表时间：
2017-04
影响因子：
5.7
通讯作者：
L. Shang;Pradeep Konda Gokuldoss;S. Sandlöbes;M. Baben;J. Schneider
中科院分区：
文献类型：
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作者：
L. Shang;Pradeep Konda Gokuldoss;S. Sandlöbes;M. Baben;J. Schneider
研究了Si对Cr2AlC基涂层氧化行为的影响。对Cr2AlC和Cr2Al1−xSixC（0 <x≤ 0.06）涂层在1120 °C空气中进行了4 h的氧化实验。研究了沉积态和氧化态涂层的晶体结构、显微组织和化学成分。合金化Cr2AlC，最高可达0.7 at.% Si使Al2O3氧化皮厚度增加40 ± 17%。电子显微镜和原子探针断层扫描数据支持的概念，这里报道的Si浓度诱导的40%的Al2O3层厚度增加（在1120 °C氧化4小时）是由Si浓度诱导，因此伴随，增加成核密度的Al2O3。
The effect of Si additions on the oxidation behavior of Cr2AlC based coatings is investigated. Oxidation experiment was performed at 1120 °C in air for 4 h for Cr2AlC and Cr2Al1−xSixC (0 <x≤ 0.06) coatings. The crystal structure, microstructure and chemical composition of the as-deposited as well as oxidized coatings have been investigated. Alloying Cr2AlC with up to 0.7 at.% Si causes an increase in Al2O3scale thickness by up to 40 ± 17%. Electron microscopy and atom probe tomography data support the notion that the here reported Si concentration induced 40% increase in Al2O3layer thickness (during oxidation at 1120 °C for 4 h) is enabled by the Si concentration induced, and hence concomitant, increase in nucleation density of Al2O3.