Plasma sprayed coatings for containment of Cu-Mg-Si metallic phase change material

Journal Article · Fri Jan 01 00:00:00 EST 2016 · Surface and Coatings Technology

DOI:https://doi.org/10.1016/j.surfcoat.2016.06.063· OSTI ID:1247637

Withey, Elizabeth Ann ^[1]; Kruizenga, Alan Michael ^[1]; Andraka, Charles E. ^[2]; Gibbs, Paul J. ^[1]

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1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

In this study, the performance of Y₂O₃-stabilized ZrO₂ (YSZ), Y₂O₃, and Al₂O₃ plasma sprayed coatings are investigated for their ability to prevent attack of Haynes 230 by a near-eutectic Cu-Mg-Si metallic phase change material (PCM) in a closed environment at 820 °C. Areas where coatings failed were identified with optical and scanning electron microscopy, while chemical interactions were clarified through elemental mapping using electron microprobe analysis. Despite its susceptibility to reduction by Mg, the Al₂O₃ coating performed well while the YSZ and Y₂O₃ coating showed clear areas of attack. These results are attributed to the evolution of gaseous Mg at 820 °C leading to the formation of MgO and MgAl₂O₄.

• Research Organization: Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000; SAND2016-0180 J; SNL_Andraka_A
• OSTI ID: 1247637
• Alternate ID(s): OSTI ID: 1397035
• Report Number(s): SAND-2016-0180J; 618323
• Journal Information: Surface and Coatings Technology, Journal Name: Surface and Coatings Technology; ISSN 0257-8972
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
phase change material
plasma spray
liquid metal containment
thermal energy storage