Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (9): 925-932.DOI: 10.15541/jim20210720
Special Issue: 【结构材料】热障与环境障涂层(202409)
• RESEARCH ARTICLE • Next Articles
AN Wenran(), HUANG Jingqi, LU Xiangrong, JIANG Jianing, DENG Longhui, CAO Xueqiang(
)
Received:
2021-11-22
Revised:
2022-01-19
Published:
2022-09-20
Online:
2022-02-14
Contact:
CAO Xueqiang, professor. E-mail: xcao@whut.edu.cnAbout author:
AN Wenran (1996-), female, Master candidate. E-mail: anwenran1019@126.com
Supported by:
CLC Number:
AN Wenran, HUANG Jingqi, LU Xiangrong, JIANG Jianing, DENG Longhui, CAO Xueqiang. Effect of Heat-treatment Temperature on Thermal and Mechanical Properties of LaMgAl11O19 Coating[J]. Journal of Inorganic Materials, 2022, 37(9): 925-932.
Coating | Spray distance/mm | Power/kW | Current/A | Plasma gas Ar/H2/slpm* | Gun velocity/(mm∙s-1) | Feeding rate/(g∙min-1) |
---|---|---|---|---|---|---|
LMA | 100 | 42 | 620 | 35/12 | 800 | 35 |
Table 1 Parameters of air plasma spraying
Coating | Spray distance/mm | Power/kW | Current/A | Plasma gas Ar/H2/slpm* | Gun velocity/(mm∙s-1) | Feeding rate/(g∙min-1) |
---|---|---|---|---|---|---|
LMA | 100 | 42 | 620 | 35/12 | 800 | 35 |
Fig. 3 XRD patterns of LMA coatings after heat-treatement at different temperatures (a) Lrt, L900, L1100; (b) L1200, L1300, L1400, L1500, and L1600; (c) Local magnification XRD patterns at 2θ between 33.5°-37° of (b)
Fig. 4 Fractured cross-section morphologies of LMA coatings after heat-treatement at different temperatures (a) Lrt; (b) L900; (c) L1100; (d) L1200; (e) L1300; (f) L1400; (g) L1500; (h) L1600
Fig. 6 Cross-sectional morphologies of LMA coatings after heat-treatement at different temperatures (a) Lrt; (b) L900; (c) L1100; (d) L1200; (e) L1300; (f) L1400; (g) L1500; (h) L1600
Fig. 10 Comparisons of XRD patterns of coatings before and after thermal shock (a) Lrt and Lsrt; (b) L900 and Ls900; (c) L1300 and Ls1300; (d) L1600 and Ls1600
Fig. 11 Fractured cross-sectional morphologies of coatings before and after thermal shock (a) Lrt; (a′) Lsrt; (b) L900; (b′) Ls900; (c) L1300; (c′) Ls1300; (d) L1600; (d′) Ls1600
HV/GPa | Lrt | L900 | L1300 | L1600 |
---|---|---|---|---|
Before | 6.61 | 6.56 | 11.08 | 6.76 |
After | 10.12 | 10.89 | 12.07 | 11.01 |
Table 2 Vickers hardness of coatings before and after thermal shock
HV/GPa | Lrt | L900 | L1300 | L1600 |
---|---|---|---|---|
Before | 6.61 | 6.56 | 11.08 | 6.76 |
After | 10.12 | 10.89 | 12.07 | 11.01 |
Fig. 12 (a-c) Fractured cross-section morphologies and (d) XRD patterns of L1600 heat-treatement at different conditions (a) L1600; (b) Ls1600; (c) Ls1600-1525
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