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

Result code in 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>

Alternative codes found

RIV/68407700:21340/19:00338760

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

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

Project

<a href="/en/project/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinary research centre for advanced materials</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Volume of the periodical

371

Issue of the periodical within the volume

15 August 2019

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

3-13

UT code for WoS article

000472694300002

EID of the result in the Scopus database

2-s2.0-85061192165