Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v9.i4.110
pages 619-624

High Temperature Oxidation Morphology of Al-Si Coating on the Superalloy K438

Shi-wei Yang
School of Material Science and Engineering, Harbin Engineering University, Harbin 150001, China
Fan-yun Zhang
ShenYang LiMing Aero Engine Limited. Shenyang 110043, China
Li Li
School of Material Science and Engineering, Harbin Engineering University, Harbin 150001, China
Jin Lou
School of Material Science and Engineering, Harbin Engineering University, Harbin 150001, China

ABSTRACT

To increase the time of efficacy of aero engines, the technology of protective coatings is widely used on the aero engine turbine, in order to improve the high temperature oxidation resistance of alloys. This study uses hot diffusion to form Al-Si coating on superalloy K438. According to GB/T13303-91(The Standard of The Public of China: Steels Detemination Method of Oxidation Resistance), high temperature oxidation experiments of Al-Si coating on superalloy K438 were carried out at 1000 °C for 50hr. The surface morphology was studied by using SEM (XL-300FEG).It is concluded that in the process of high temperature oxidation, the Al-Si coating on superalloy K438 has formed continuous and compact oxide scale α-Al2O3 ,which would prevent oxygen permeating to the alloy substrate. This oxide scale α-Al2O3 has no cracks and did not peeled off. The addition of Si to the coating can effectively prevent diffusion between elements of substrate and those of coating. It acts as a diffusion barrier, prolongs the deterioration period of coating and provides excellent high temperature oxidation resistance.


Articles with similar content:

INFLUENCE OF NICKEL OXIDE AMOUNT ON ELECTRICAL PARAMETERS AND STABILITY OF SUPERCAPACITORS
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.14, 2010, issue 3
Z . Kavaliauskas, L. L. Pranevicius, L. Marcinauskas, Liudas Pranevicius, Pranas Valatkevicius
Alumina coatings from aluminium electrodeposited in molten salts
Advances in Molten Salts, Vol.0, 1998, issue
Pr. V. Hasthorpe, Ir. S. Delhaye
FORMATION OF PLATINUM SILICIDE LAYERS DURING THE RAPID THERMAL PROCESSING OF THE PLATINUM–SILICON SYSTEM: STRUCTURAL-PHASE CHANGES
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.23, 2019, issue 3
Valentina A. Gorushko, Vitaly A. Solodukha, Fadei F. Komarov, Vladimir A. Pilipenko, O. V. Milchanin
COMPARISON OF THERMO-PHYSICAL PROPERTIES AND THERMAL PERFORMANCE OF MACRO-CRACKED THERMAL BARRIER COATING PROCESSED BY APS WITH EBPVD TBCS
International Heat Transfer Conference 13, Vol.0, 2006, issue
Nalini Uppu, Patrick Mensah
FORMATION OF MICROSTRUCTURES AND OXIDES ON STRUCTURAL STEEL BY NANOSECOND LASER IRRADIATION
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.18, 2014, issue 3
C. Lupulescu, A. N. Chumakov, M. Mitric, B. Gakovic, Irina S. Nikonchuk, Suzana Petrovic