Multiscale experimental characterization of coatings on ceramics: A case study of tungsten on SiC

SURFACE & COATINGS TECHNOLOGY

卷:367

Article

Li, Huaxin¹  Koyanagi, Takaaki²  Hu, Xunxiang²  Katoh, Yutai² 

[1] Hefei Univ Technol, Hefei 230009, Anhui, Peoples R China

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

关键词: Coating;    Multiscale characterization;    Micro-mechanical testing;    Transmission Kikuchi diffraction;   

DOI  :  10.1016/j.surfcoat.2019.03.040

来源: Elsevier

【 摘 要 】

State-of-the-art transmission Kikuchi diffraction (TKD) and high-speed nano-indentation were combined with glow-discharge optical emission spectroscopy (GDOES), transmission electron microscopy (TEM) and micro-cantilever testing to characterize microstructures and mechanical properties of coatings on a ceramic substrate. The goal was to develop a multiscale experimental characterization method to assess the coating/substrate couple. A tungsten coated silicon carbide substrate was the system used for this development. The combination of GDOES, TEM and TKD enabled precise phase identification in the system, while TKD provided superior spatial resolution for phase identification. Micro-cantilever tests were able to measure adhesion strength, with support from high-speed nano-indentation which enabled rapid modulus and hardness determination over relatively large areas.

【 授权许可】

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