Coated Article

Details Coated Article Coated Article

1997-02-19

1998-12-08

Turner, A. A.

Coating processes

Coating by vapor, gas, or smoke

Base includes an inorganic compound containing silicon or...

4272481, 427250, 4272557, 4274191, 4274192, 4271261, 4271263, 427585, 4273837, 427328, 427331, C23C 2800, C23C 1606

Patent

active

058466053

ABSTRACT:
A superalloy turbine blade (10) has a MCRALY bond coating (22) and a thermal barrier coating (24). The thermal barrier coating (24) comprises a plurality of alternate layers (25, 27) which have different structure to produce a plurality of interfaces (26) substantially parallel to the metallic substrate (20)/ bond coating (22) interface. These interfaces (26) provide paths of increased resistance to heat transfer to reduce thermal conductivity of thermal barrier coating (24). The structure in the alternate layers (25, 27) of the thermal barrier coating (24) is columnar (28), or segmented, to ensure that the strain tolerance of the thermal barrier coating (24) is not impaired. The columnar grains (28) in the layers (25, 27) extend substantially perpendicular to the metallic substrate (20)/ bond coating (22) interface. This enables thermal barrier coating (24) of reduced thickness and weight to be used. The bond coat may have an oxide or oxide/metal interface which improves the adhesion of the thermal barrier coating.

REFERENCES:
patent: 3677789 (1972-07-01), Bungardt et al.
patent: 3692554 (1972-09-01), Bungardt et al.
patent: 3819338 (1974-06-01), Bungardt et al.
patent: 3961910 (1976-06-01), Baladjanian et al.
patent: 3979273 (1976-09-01), Panzera et al.
patent: 3999956 (1976-12-01), Stueber et al.
patent: 4123595 (1978-10-01), Chang
patent: 4137370 (1979-01-01), Fujishiro et al.
patent: 4321310 (1982-03-01), Ulion et al.
patent: 4321311 (1982-03-01), Strangman
patent: 4399199 (1983-08-01), McGill et al.
patent: 4401697 (1983-08-01), Strangman
patent: 4405659 (1983-09-01), Strangman
patent: 4477538 (1984-10-01), Clarke
patent: 4530885 (1985-07-01), Restall
patent: 4643951 (1987-02-01), Keem
patent: 4722869 (1988-02-01), Honda et al.
patent: 4880614 (1989-11-01), Strangman
patent: 4916022 (1990-04-01), Solfest et al.
patent: 5015502 (1991-05-01), Strangman et al.
patent: 5180285 (1993-01-01), Lau
patent: 5236745 (1993-08-01), Gupta et al.
patent: 5238752 (1993-08-01), Duderstadt et al.
patent: 5254413 (1993-10-01), Maricocchi
patent: 5427866 (1995-06-01), Nagaraj et al.
patent: 5514482 (1996-05-01), Strangman
patent: 5645893 (1997-07-01), Rickerby et al.
patent: 5652044 (1997-07-01), Rickerby
R. Lowrie, "Composite Coatings of CoCrAlY Plus Platinum", Thin Solid Films, 45 (1977), pp. 491-498.
Birks et al., "Introduction to High Temperature Oxidation of Metals", 1983, p. 128.
A. McMinn et al., "Field Evaluation of Gas Turbin Protective Coatings", Journal of Engineering for Gas Turbines and Power, vol. 110, Jan. 1988, p. 142.
T. E. Strangman, "Thermal Barrier Coatings for Turbine Airfoils", in Thin Solid Films, 127 (1985), pp. 93-105.
J. T. Prater et al., "Ceramic Thermal Barrier Coatings with Improved Corrosion Resistance", Surface and Coatings Technology, vol. 32, 1987, pp. 389-397.

Affiliated with

Also associated with

Rating

Coated Article does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coated Article, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coated Article will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-174996