Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity

Xiang Chen; Bastian Stelzer; Marcus Hans; Riza Iskandar; Joachim Mayer; Jochen M. Schneider

doi:10.1080/21663831.2020.1854358

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Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity

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- Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity
- Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity
- 材料研究快报（英文） 2021年9卷第3期页码：127-133
- 作者机构：
  
  1. a Materials Chemistry RWTH Aachen University Aachen Germany
  2. b Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology
  3. a Materials Chemistry RWTH Aachen University
  4. d Thermo Fisher Scientific
  5. c Central Facility for Electron Microscopy RWTH Aachen UniversityAachen Germany
  6. e Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1854358
  中图分类号：
- 网络首发：2020-12-18，
  
  纸质出版：2021
- 稿件说明：
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Xiang Chen, Bastian Stelzer, Marcus Hans, 等. Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity[J]. 材料研究快报（英文）, 2021,9(3):127-133.

Xiang Chen, Bastian Stelzer, Marcus Hans, et al. Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity[J]. Materials Research Letters, 2021, 9(3): 127-133.
Xiang Chen, Bastian Stelzer, Marcus Hans, 等. Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity[J]. 材料研究快报（英文）, 2021,9(3):127-133. DOI： 10.1080/21663831.2020.1854358.

Xiang Chen, Bastian Stelzer, Marcus Hans, et al. Enhancing the high temperature oxidation behavior of Cr2AlC coatings by reducing grain boundary nanoporosity[J]. Materials Research Letters, 2021, 9(3): 127-133. DOI： 10.1080/21663831.2020.1854358.

摘要

Abstract

The oxidation behavior of Cr

AlC MAX phase coatings with columnar and equiaxed morphologies is compared. After oxidation at 1100°C for 240 min the Cr2AlC MAX phase coatings with equiaxed grains showed a 20% lower scale thickness and a 52% larger scale grain size as the coatings with columnar grains. Transmission electron microscopy data suggests that this is primarily caused by nanopores (2–25 nm) present in the columnar grain boundaries. As their presence has previously been overlooked

a 20% improvement of the high temperature oxidation behavior of Cr

AlC coatings is obtained if the formation of nanopores is avoided.

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