Critical Weak Points of Atmospheric Plasma Sprayed Thermal Barrier Coatings

被引：1

作者：

Jech, David ^{[1
,2
]}

Celko, Ladislav ^{[1
,2
]}

Julis, Martin ^{[1
,2
]}

Klakurkova, Lenka ^{[1
,2
]}

Slamecka, Karel ^{[1
,3
]}

Obrtlik, Karel ^{[4
]}

Svejcar, Jiri ^{[1
,2
]}

机构：

[1] Brno Univ Technol, Cent European Inst Technol, CS-61090 Brno, Czech Republic

[2] Brno Univ Technol, Fac Mech Engn, CS-61090 Brno, Czech Republic

[3] Brno Univ Technol, Fac Mech Engn, Inst Phys Engn, CS-61090 Brno, Czech Republic

[4] Inst Phys Mat, Acad Sci Czech Republ, Brno, Czech Republic

来源：

METALLOGRAPHY XV | 2014年 / 782卷

关键词：

thermal barrier coatings; isothermal exposure; thermally grown oxide; superalloy; electron microscopy; TGO GROWTH-BEHAVIOR; BOND COATS; OXIDATION; MICROSTRUCTURE; EXPOSURE;

D O I：

10.4028/www.scientific.net/MSF.782.567

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The 8 wt. % yttria stabilized zirconia top coat (TC) and the CoNiCrAlY bond coat (BC) were sprayed onto the surface of newly developed fine-grained cast polycrystalline nickel-based superalloy Inconel 713LC by means of atmospheric plasma spraying (APS). As-prepared samples were isothermally exposed at the temperature of 1050 degrees C for 200 hours in an ambient atmosphere. Structural changes in the thermal barrier coatings (TBC) system after thermal exposure were studied by means of scanning electron microscope equipped with an energy dispersive microanalyzer. Critical weak points were identified on both the substrate-bond coat and bond coat-top coat interfaces.

引用

页码：567 / 572

页数：6

共 16 条

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