High-temperature protection layer
View Patent ↗A high-temperature protection layer contains (% by weight) 23 to 27% Cr, 4 to 7% Al, 0.1 to 3% Si, 0.1 to 3% Ta, 0.2 to 2% Y, 0.001 to 0.01% B, 0.001 to 0.01% Mg and 0.001 to 0.01% Ca, remainder Ni and inevitable impurities. Optionally, the Al content is in a range from over 5 up to 6% by weight.
1. A high-temperature protection layer for a component, consisting of (% by weight): 23 to 27% Cr, 4 to 7% Al, 0.1 to 3% Si, 0.1 to 3% Ta, 0.2 to 2% Y, 0.001 to 0.01% B, 0.001 to 0.01% Mg, and 0.001 to 0.01% Ca, remainder Ni and inevitable impurities.
2. The high-temperature protection layer as claimed in claim 1 , wherein the Al content is (% by weight) from 5% to 6%.
3. The high-temperature protection layer as claimed in claim 1 , wherein the quantitative ratio of Cr to Al is in the range from 3.6 to 6.5.
4. The high-temperature protection layer as claimed in claim 1 , wherein the quantitative ratio of Ni to Cr is in the range from 2.3 to 3.0.
5. The high-temperature protection layer as claimed in claim 1 , comprising a γ (gamma) phase and a γ′ (gamma prime) phase, and wherein the sum of the proportions by volume of the γ (gamma) and γ′ (gamma prime) phases in the temperature range from 800° C. to 1050° C. is more than 50%.
6. The high-temperature protection layer as claimed in claim 1 , comprising α-Cr phases, and wherein the proportion by volume of the α-Cr phases in the temperature range from 800° C. to 900° C. is more than 5%.
7. The high-temperature protection layer as claimed in claim 1 , wherein the layer has a thickness of between 0.03 mm and 1.5 mm.
8. The high-temperature protection layer as claimed in claim 7 , further comprising:
a base material of a component, or an intermediate layer; and
wherein the layer is applied directly to the base material or to the intermediate layer.
9. A high-temperature protection layer comprising (% by weight): 23 to 27% Cr, 4 to 7% Al, 0.1 to 3% Si, 0.1 to 3% Ta, 0.2 to 2% Y, 0.001 to 0.01% B, 0.001 to 0.01% Mg, and 0.001 to 0.01% Ca, remainder Ni and inevitable impurities produced by a process selected from the group consisting of
under a vacuum,
under shielding gas, and
in air by
thermal spraying processes (LPPS, VPS, APS),
high-velocity spraying (HVOF),
electrochemical deposition, or
physical/chemical vapor deposition (PVD, CVD).
10. A high-temperature protection layer comprising (% by weight): 23 to 27% Cr, 4 to 7% Al, 0.1 to 3% Si, 0.1 to 3% Ta, 0.2 to 2% Y, 0.001 to 0.01% B, 0.001 to 0.01% Mg, and 0.001 to 0.01% Ca, remainder Ni and inevitable impurities, configured and arranged to be a coating for components of thermal turbomachines.
11. A system comprising:
a thermal barrier coating and a bonding layer beneath the thermal barrier coating; and
wherein the bonding layer comprises a high-temperature protection layer comprising (% by weight): 23 to 27% Cr, 4 to 7% Al, 0.1 to 3% Si, 0.1 to 3% Ta, 0.2 to 2% Y, 0.001 to 0.01% B, 0.001 to 0.01% Mg, and 0.001 to 0.01% Ca, remainder Ni and inevitable impurities.