Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: powłoka termiczna

Sortuj według:

Ogranicz wyniki do:

Estimation of residual stress in air plasma sprayed MWCNT-reinforced 8YSZ-alumina composite coating

Thakare J. G., Mulik R. S., Mahapatra M. M.

Archives of Civil and Mechanical Engineering

2020

Vol. 20, no. 4

1--15

Thermal barrier coating (TBC) with Al2O3 and 8YSZ as topcoat constituents has been developed. The commercially available 8YSZ (80% wt.), Al2O3 (17 and 19% wt.) and multiwall carbon nanotubes (MWCNT) (3% and 1% wt.) were plasma sprayed to produce composite coatings. A stress relaxation technique using a slow-speed diamond cutter has been used to relax the strain and determine the through-thickness residual stress in the coatings. A 3D finite element model was developed, the model was experimentally validated, and the model was used to establish a relationship between applied stress and relaxed strain. The addition of alumina increased the compressive residual stress on the surface of the coating by 42%, the addition of 1% MWCNT had a negligible effect on the residual stress on the coating surface. The further addition of MWCNT (3% wt.) resulted in tensile residual stress in the coating as a result of MWCNT agglomeration.

Cohesion and Adhesion Interlayer of the Thermal Barrier Coatings Made of Cobalt Alloy MAR-M509

Opiekun Z. A., Trytek A.

Archives of Foundry Engineering

2014

Vol. 14, iss. 1 spec.

159--164

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.

Life cycle increasing of mechanical components using thermal coatings with recasts

Herditzky A., Kickova M.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

2008

z. 73 [253]

117-122

This article concerned with proposition of friction and deterioration of functional components surfaces in adhesive deterioration area and contact endurance. It's centered for possibilities how to decrease deterioration and extend a life cycle of component choosing appropriate material, component surface adjustment, or abrasion-resistant coatings painting with expressively better properties against basic material.