Plasma hardfacing of metal matrix composite reinforced with non-oxide ceramics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F25%3A00386530" target="_blank" >RIV/68407700:21220/25:00386530 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Plasma hardfacing of metal matrix composite reinforced with non-oxide ceramics
Original language description
This study investigates the fabrication of metal matrix composites (MMCs) through pulsed plasma transferred arc (PTA) deposition of Inconel 625® superalloy reinforced with silicon carbide (SiC) particles. The objective was to create uniform coatings with well-distributed SiC reinforcements that were metallurgically bonded to the substrate material. Ten experimental samples were fabricated using varying process parameters. The influence of the pulse current (75-90 A), pulse frequency (28-200 Hz), and plasmatron distance from the substrate (4-10 mm) was monitored. Temperature monitoring during deposition revealed peak temperatures ranging between 1100-1200°C depending on the process parameters. Microstructural analysis using optical and scanning electron microscopy showed semi-successful incorporation of SiC particles within the Inconel 625® matrix, with energy-dispersive spectroscopy (EDS) confirming the presence of silicon, carbon, and nickel-based phases. Microhardness measurements demonstrated significant hardening effects, with values increasing from 250 HV for pure Inconel 625® to 400-600 HV for SiC-reinforced composites. The results indicate that optimal processing conditions involve higher pulse currents (90 A), higher frequencies (200 Hz), and a shorter plasmatron distance from the substrate (4 mm) to achieve a uniform distribution while minimizing porosity and cracking. This study contributes to the understanding of PTA processing parameters for fabricating high-performance MMC coatings suitable for wear-resistant applications.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů