Acta Metallurgica Sinica (English Letters) ›› 2014, Vol. 27 ›› Issue (6): 1114-1121.DOI: 10.1007/s40195-014-0133-4
• Orginal Article • Previous Articles Next Articles
Zhang Feng1,2, Lan Hao1, Huang Chuanbing1, Zhou Yang1, Du Lingzhong1, Zhang Weigang1()
Received:
2014-09-17
Revised:
2014-09-17
Online:
2014-09-17
Published:
2015-07-23
Zhang Feng, Lan Hao, Huang Chuanbing, Zhou Yang, Du Lingzhong, Zhang Weigang. Corrosion Resistance of Ti3Al/BN Abradable Seal Coating[J]. Acta Metallurgica Sinica (English Letters), 2014, 27(6): 1114-1121.
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Spray parameters | Value |
---|---|
Arc current | 550-650 A |
Primary plasma gas Ar | 45-55 L/min |
Secondary plasma gas H2 | 12-15 L/min |
Carrier gas Ar | 2.0-2.5 L/min |
Pressure of spraying atmosphere | 12.5-15.0 kPa |
Spray distance | 150 mm |
Table 1 Vacuum plasma spray process parameters
Spray parameters | Value |
---|---|
Arc current | 550-650 A |
Primary plasma gas Ar | 45-55 L/min |
Secondary plasma gas H2 | 12-15 L/min |
Carrier gas Ar | 2.0-2.5 L/min |
Pressure of spraying atmosphere | 12.5-15.0 kPa |
Spray distance | 150 mm |
Sample | E OCP (V) | E corr (V) | E pp (V) | E bp (V) | i corr (μA/cm2) |
---|---|---|---|---|---|
Al/BN | -1.13 | -1.10 | - | - | 20.2 |
TAC-1 | -0.61 | -0.91 | -0.75 | -0.15 | 10.5 |
TAC-2 | -0.22 | -0.67 | -0.52 | 0.02 | 5.1 |
Table 2 Corrosion resistance parameters of Al/BN coating, TAC-1, and TAC-2
Sample | E OCP (V) | E corr (V) | E pp (V) | E bp (V) | i corr (μA/cm2) |
---|---|---|---|---|---|
Al/BN | -1.13 | -1.10 | - | - | 20.2 |
TAC-1 | -0.61 | -0.91 | -0.75 | -0.15 | 10.5 |
TAC-2 | -0.22 | -0.67 | -0.52 | 0.02 | 5.1 |
Element | Site 1 | Site 2 | Site 3 | Site 4 |
---|---|---|---|---|
Ti | 94.5 ± 0.3 | 79.6 ± 0.9 | 75.5 ± 0.4 | 71.2 ± 1.1 |
Al | 5.5 ± 0.3 | 20.4 ± 0.9 | 24.5 ± 0.4 | 28.8 ± 1.1 |
Table 3 Chemical compositions of the marked areas shown in Fig. 11 analyzed by EDS (in wt%)
Element | Site 1 | Site 2 | Site 3 | Site 4 |
---|---|---|---|---|
Ti | 94.5 ± 0.3 | 79.6 ± 0.9 | 75.5 ± 0.4 | 71.2 ± 1.1 |
Al | 5.5 ± 0.3 | 20.4 ± 0.9 | 24.5 ± 0.4 | 28.8 ± 1.1 |
Element | Site 1 | Site 2 |
---|---|---|
Ti | 83.3 ± 0.4 | 85.8 ± 0.3 |
Al | 16.7 ± 0.4 | 14.2 ± 0.3 |
Table 4 Chemical compositions of the marked areas shown in Fig. 12 analyzed by EDS (in wt%)
Element | Site 1 | Site 2 |
---|---|---|
Ti | 83.3 ± 0.4 | 85.8 ± 0.3 |
Al | 16.7 ± 0.4 | 14.2 ± 0.3 |
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