Materials and processing factors influencing stress evolution and mechanical properties of plasma sprayed coatings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00505278" target="_blank" >RIV/61389021:_____/19:00505278 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/19:00338760

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0257897219301227?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0257897219301227?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2019.01.105" target="_blank" >10.1016/j.surfcoat.2019.01.105</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Materials and processing factors influencing stress evolution and mechanical properties of plasma sprayed coatings

Popis výsledku v původním jazyce

Residual stress is an important factor that may influence the integrity of plasma sprayed coatings, as well as the performance and lifetime of coated parts. The stress, in turn, is influenced by the properties of the substrate and coating materials and by the processing conditions. Moreover, specific stress-strain behavior of plasma sprayed coatings stems from their characteristic structure, which is again influenced by the spraying parameters. In this work, the curvature and temperature monitoring by “ICP” (In-situ Coating Properties) sensor was used to track the stress evolution during and after coating deposition and to determine the coating stiffness - this was complemented by 4-point bending, hardness measurement, microstructural observations and image analysis. Representative ceramic, metallic and composite coatings, including functionally graded materials (FGMs), were investigated. The effects of processing parameters, such as deposition temperature, particle temperature and velocity, deposition rate and coating/substrate material combination were demonstrated. Ceramic Al 2 O 3 coatings exhibited residual stress values in tens of MPa and extensive splat cracking - their moduli were higher when loaded in compression than in tension. Metallic coatings (Cu, W, and W + Cu composites) showed residual stress values in hundreds of MPa without significant cracking. Residual stresses as well as coating moduli were higher for mixed W + Cu composites than for 100% W or 100% Cu coatings, possibly as a result of stronger intersplat bonding across heterogeneous interfaces. It was also shown that residual stress profiles in W + Cu FGMs may be significantly altered by intentional design of the gradation profile and that experimental data evaluated by ICP during the actual deposition of the FGM coating were in good agreement with theoretical model based on data from the deposition of individual mixed W + Cu layers. Higher stress and modulus magnitudes were generally observed under conditions resulting in stronger bonding between the splats.

Název v anglickém jazyce

Materials and processing factors influencing stress evolution and mechanical properties of plasma sprayed coatings

Popis výsledku anglicky

Residual stress is an important factor that may influence the integrity of plasma sprayed coatings, as well as the performance and lifetime of coated parts. The stress, in turn, is influenced by the properties of the substrate and coating materials and by the processing conditions. Moreover, specific stress-strain behavior of plasma sprayed coatings stems from their characteristic structure, which is again influenced by the spraying parameters. In this work, the curvature and temperature monitoring by “ICP” (In-situ Coating Properties) sensor was used to track the stress evolution during and after coating deposition and to determine the coating stiffness - this was complemented by 4-point bending, hardness measurement, microstructural observations and image analysis. Representative ceramic, metallic and composite coatings, including functionally graded materials (FGMs), were investigated. The effects of processing parameters, such as deposition temperature, particle temperature and velocity, deposition rate and coating/substrate material combination were demonstrated. Ceramic Al 2 O 3 coatings exhibited residual stress values in tens of MPa and extensive splat cracking - their moduli were higher when loaded in compression than in tension. Metallic coatings (Cu, W, and W + Cu composites) showed residual stress values in hundreds of MPa without significant cracking. Residual stresses as well as coating moduli were higher for mixed W + Cu composites than for 100% W or 100% Cu coatings, possibly as a result of stronger intersplat bonding across heterogeneous interfaces. It was also shown that residual stress profiles in W + Cu FGMs may be significantly altered by intentional design of the gradation profile and that experimental data evaluated by ICP during the actual deposition of the FGM coating were in good agreement with theoretical model based on data from the deposition of individual mixed W + Cu layers. Higher stress and modulus magnitudes were generally observed under conditions resulting in stronger bonding between the splats.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinární výzkumné centrum moderních materiálů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

371

Číslo periodika v rámci svazku

15 August 2019

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

3-13

Kód UT WoS článku

000472694300002

EID výsledku v databázi Scopus

2-s2.0-85061192165