Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4
Promoting molten calcium–magnesium–alumina–silicate (CMAS) crystallization can highly reduce the melt penetration into thermal barrier coatings (TBCs), which alleviates its corrosion to TBCs. In marine environments, many salts are coupled with CMAS. In this study, we investigated the crystallization...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-06-01
|
| Series: | Corrosion Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667266923000075 |
| _version_ | 1797785422023098368 |
|---|---|
| author | Xinmu Zhang Hui Xin Lei Guo |
| author_facet | Xinmu Zhang Hui Xin Lei Guo |
| author_sort | Xinmu Zhang |
| collection | DOAJ |
| description | Promoting molten calcium–magnesium–alumina–silicate (CMAS) crystallization can highly reduce the melt penetration into thermal barrier coatings (TBCs), which alleviates its corrosion to TBCs. In marine environments, many salts are coupled with CMAS. In this study, we investigated the crystallization behavior of CMAS + NaCl/NaSO4, and pointed out its influence on the corrosion behavior of TBCs. At 1200 ℃, CMAS + NaCl was crystalized into CaMgSi2O6, CaSiO3 and CaAl2Si2O8, while the crystallization products of CMAS + NaSO4 depended on NaSO4 content, i.e., 4 wt.% and 10 wt.% NaSO4 addition leading to CaAl2Si2O8 and Ca2Al(AlSiO7) phases, respectively, in addition to CaMgSi2O6 and CaSiO3. At 1100 ℃, CMAS + NaSO4 crystalized, while CMAS + NaCl had no crystallization. At lower temperatures, both NaCl and NaSO4 additions could suppress CMAS crystallization. It reveals that CMAS coupled with molten salt is hard to crystallize, which is detrimental to corrosion protection. |
| first_indexed | 2024-03-13T00:54:51Z |
| format | Article |
| id | doaj.art-14975d3bdb074bdd81d365019ed09cce |
| institution | Directory Open Access Journal |
| issn | 2667-2669 |
| language | English |
| last_indexed | 2024-03-13T00:54:51Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Corrosion Communications |
| spelling | doaj.art-14975d3bdb074bdd81d365019ed09cce2023-07-07T04:27:59ZengElsevierCorrosion Communications2667-26692023-06-011019Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4Xinmu Zhang0Hui Xin1Lei Guo2School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin 300072, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Materials Science and Engineering, Tianjin University, Tianjin 300072, China; Tianjin Key Laboratory of Advanced Joining Technology, Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin 300072, China; Corresponding author.Promoting molten calcium–magnesium–alumina–silicate (CMAS) crystallization can highly reduce the melt penetration into thermal barrier coatings (TBCs), which alleviates its corrosion to TBCs. In marine environments, many salts are coupled with CMAS. In this study, we investigated the crystallization behavior of CMAS + NaCl/NaSO4, and pointed out its influence on the corrosion behavior of TBCs. At 1200 ℃, CMAS + NaCl was crystalized into CaMgSi2O6, CaSiO3 and CaAl2Si2O8, while the crystallization products of CMAS + NaSO4 depended on NaSO4 content, i.e., 4 wt.% and 10 wt.% NaSO4 addition leading to CaAl2Si2O8 and Ca2Al(AlSiO7) phases, respectively, in addition to CaMgSi2O6 and CaSiO3. At 1100 ℃, CMAS + NaSO4 crystalized, while CMAS + NaCl had no crystallization. At lower temperatures, both NaCl and NaSO4 additions could suppress CMAS crystallization. It reveals that CMAS coupled with molten salt is hard to crystallize, which is detrimental to corrosion protection.http://www.sciencedirect.com/science/article/pii/S2667266923000075Thermal barrier coatingCMASCrystallization behaviorMolten salt |
| spellingShingle | Xinmu Zhang Hui Xin Lei Guo Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 Corrosion Communications Thermal barrier coating CMAS Crystallization behavior Molten salt |
| title | Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 |
| title_full | Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 |
| title_fullStr | Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 |
| title_full_unstemmed | Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 |
| title_short | Crystallization behavior of calcium–magnesium–alumina–silicate coupled with NaCl/Na2SO4 |
| title_sort | crystallization behavior of calcium magnesium alumina silicate coupled with nacl na2so4 |
| topic | Thermal barrier coating CMAS Crystallization behavior Molten salt |
| url | http://www.sciencedirect.com/science/article/pii/S2667266923000075 |
| work_keys_str_mv | AT xinmuzhang crystallizationbehaviorofcalciummagnesiumaluminasilicatecoupledwithnaclna2so4 AT huixin crystallizationbehaviorofcalciummagnesiumaluminasilicatecoupledwithnaclna2so4 AT leiguo crystallizationbehaviorofcalciummagnesiumaluminasilicatecoupledwithnaclna2so4 |