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

In this study, the performance of Y 2O 3-stabilized ZrO 2 (YSZ), Y 2O 3, and Al 2O 3 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 Al 2O 3 coating performed well while the YSZ and Y 2O 3 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 MgAl 2O 4.
Authors:
 [1] ;  [1] ;  [2] ;  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2016-0180J
Journal ID: ISSN 0257-8972; 618323
Grant/Contract Number:
AC04-94AL85000; SAND2016-0180 J; SNL_Andraka_A
Type:
Accepted Manuscript
Journal Name:
Surface and Coatings Technology
Additional Journal Information:
Journal Name: Surface and Coatings Technology; Journal ID: ISSN 0257-8972
Publisher:
Elsevier
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; phase change material; plasma spray; liquid metal containment; thermal energy storage
OSTI Identifier:
1247637
Alternate Identifier(s):
OSTI ID: 1397035