Tribological behavior of Polycrystalline diamond – Tantalum composites

Tribological performance of polycrystalline diamond‑tantalum (PCD-Ta) composites manufactured by powder metallurgy and HPHT sintering was studied. Different PCD/Ta concentrations were prepared and tested in a pin-on-disc configuration. The tribological interactions were investigated through depths o...

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Bibliographic Details
Published in:International journal of refractory metals & hard materials 2022-01, Vol.102, p.105711, Article 105711
Main Authors: de Medeiros, Regina Bertília Dantas, Gurgel, Diego Pires, Barreto, Lucas Pires de Paiva, Mashhadikarimi, Meysam, Filgueira, Marcello, Gomes, Uílame Umbelino
Format: Article
Language:English
Subjects:
Abrasive wear
Adhesive wear
Coefficient of friction
Composite materials
Metallurgical analysis
PCD tools
Polycrystalline diamond
Polycrystals
Powder metallurgy
Sintering (powder metallurgy)
Surface analysis
Tantalum
Tribology
Wear mechanism
Wear mechanisms
Wear rate
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Summary:Tribological performance of polycrystalline diamond‑tantalum (PCD-Ta) composites manufactured by powder metallurgy and HPHT sintering was studied. Different PCD/Ta concentrations were prepared and tested in a pin-on-disc configuration. The tribological interactions were investigated through depths of penetration, Coefficients of Friction (CoF), wear rates, and microstructural evaluation of pairs. The overall results indicated that tantalum percentage directly influenced the tribological behavior of composite pairs, and higher wear performance was observed in samples with lower binder content. Furthermore, microstructural analyses revealed that all pairs exhibited abrasive and adhesive wear mechanisms, and their intensities were closely dependent on the Ta concentration. •PCD-Ta composites were tribologically tested against 4340 steel.•Wear rates of pins and discs were closely dependent on the binder content.•Three distinct wear stages were observed in all studied compositions.•Abrasive and adhesive were the predominant wear mechanisms detected in the pairs.
ISSN:0263-4368
2213-3917
DOI:10.1016/j.ijrmhm.2021.105711