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1
Content available Cohesion and Adhesion Interlayer of the Thermal Barrier Coatings Made of Cobalt Alloy MAR-M509
Opiekun Z. A., Trytek A.
Archives of Foundry Engineering
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2014
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Vol. 14, iss. 1 spec.
159--164
EN
The manuscript presents microstructure, geometrical product specification and results of scratch tests performed on the interlayer of thermal barrier coating (TBC) with Rockwell’s intender. The TBC was provided by depositing two layers; metallic interlayer and external ceramic layer onto a plate coating made of cobalt alloy MAR-M509 in plasma spraying process. The surface of the casting was sandblasted with Al2O3 powder in an air stream before the TBC was introduced. Scratches were made along the cross-section from a mould material (MAR-M509) through metallic interlayer and external ceramic layer in the TBC. Friction force, friction factor and acoustic emission were recorded during the test. It has been proved that metallic interlayer in the TBC of ca. 200 μm thickness forms tough coating without pores with good cohesion values and very good adhesion values to the mould.
2
Content available Mechanical Properties of Two Layers Thermal Barrier Coating Deposited on a Plate Made of Cobalt Alloy MAR-M509
Opiekun Z. A.
Archives of Foundry Engineering
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2013
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Vol. 13, iss. 1 spec.
131--134
EN
The manuscript presents a microstructure and mechanical properties of two layers of thermal barrier coating (TBC) deposited on a plate made of cobalt alloy MAR-M509. Based on measurements of microhardness made with Berkovitz’s indenter using Nano Scratch-Tester CSM Instruments, it was stated that elastic (Ee) to total energy (Ec) parameters (MIT=Ee/Ec), γ phase, matrix of alloy MAR-M509 (MITγ), metallic interlayer (45%Ni – 22% Co – 17% Cr – 16% Al – 0,3% Y),(MITM) and ceramic layer (MITZrO2) there are proportion 0,29:0,22:0,50.
3
Mikrostruktura i twardość powłokowej bariery cieplnej na odlewie z żarowytrzymałego stopu na osnowie kobaltu
Opiekun Z., Pająk D.
Rudy i Metale Nieżelazne
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2012
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R. 57, nr 6
374-377
PL
W artykule przedstawiono mikrostrukturę i właściwości mechaniczne powłokowej bariery cieplnej (TBC) wykonanej z ZrO2 na odlewie płytki ze stopu kobaltu MAR-M509. Na podstawie pomiarów mikrotwardości wykonanych piramidką Berkovitz'a przy użyciu Nano Scratch - Testera, CSM Instruments stwierdzono, że mikrotwardość TBC jest około 18 % większa niż mikrotwardość fazy [gamma] (osnowy stopu MAR-M509).
EN
The manuscript presents a microstructure and mechanical properties of thermal barrier coating (TBC) made of ZrO2 and deposited on a plate coating made of cobalt alloy MAR-M509. Based on measurements of microhardness made with Berkovitz's indenter when Nano Scratch - Tester, CSM Instruments was used, it was stated that microhardness of TBC is about 18 % larger than microhardness of [gamma] phase (matrix of alloy MAR-M509).
4
Content available remote Residual stresses in a surface remelting of castings made of cobalt alloy MAR-M509 with a plasma generated in electric arc
Opiekun Z.
Archives of Foundry Engineering
|
2010
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Vol. 10, iss. 1 spec.
199--202
EN
The manuscript presents the results of measurements of residual stresses (RS) in partial meltings of casting surfaces made of cobalt alloy MAR-M509. The partial meltings were made with an argon plasma beam by GTAW method. The values of RS were determined by X-ray diffraction method in grazing incident geometry, by g-sin2ψ method and in Bragg-Brentano (BB) geometry. It has been stated that RS values depend on the parameters of partial melting process. It has been claimed that compressive stresses, which are present in the thin layer up to ca 2 μm, convert to tensile stresses in deeper layers of partial meltings.
5
Content available remote Interference of geometrical product specification caused by interaction of concentrated energy fluxes
Liubimow V., Opiekun Z., Puhowskij E.
Archives of Foundry Engineering
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2010
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Vol. 10, iss. 1 spec.
415--418
EN
The manuscript presents changes of geometrical product specification (GPS) in different materials that were subjected to point and linear interactions of laser flux and to helium and argon plasma beams generated in electric arc. The growth of laser flux energy density leads from surface heating to evaporating and material sublimation, and causes increase of surface roughness with cracks. The growth of electric arc energy causes increase of crater diameter of partial meltings and increase of surface roughness of partially melted materials.
6
Content available remote Structural studies of partial meltings of casting surfaces made of cobalt alloy MAR-M509
Opiekun Z., Chruściel K.
Archives of Foundry Engineering
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2009
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Vol. 9, iss. 2
197-200
EN
The results of structural studies of partial meltings of casting surfaces of plates made of cobalt alloy MAR-M509 have been presented. The partial meltings were formed with argon or helium plasma beam generated in electric arc. Observations of microstructure revealed presence of phase y and carbides. X-ray diffraction has shown phase y, carbide types MC and M23C6 and scanty amount of hexagonal phase [...].
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