首页|High-temperature annealing of polycrystalline diamond compact with cobalt removal and evolution of tribological properties of grinding balls
High-temperature annealing of polycrystalline diamond compact with cobalt removal and evolution of tribological properties of grinding balls
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NSTL
Elsevier
? 2022 Elsevier B.V.A friction experiment was carried out after the high-temperature annealing of polycrystalline diamond compact (PDC) with cobalt removal and unused grinding balls. The annealing process was carried out in a box-type resistance furnace. The PDC after high-temperature annealing for cobalt removal was studied by scanning electron microscopy, energy-dispersive X-ray spectrometry, atomic force microscopy, and X-ray photoelectron spectroscopy (XPS). The results of atomic force microscopy showed that the roughness of ZrO2 after grinding with PDC was the lowest among the three friction pairs that were studied, and it exhibited excellent tribological properties. The experimental results showed that different tribochemical mechanisms operated between the unused grinding balls and PDC. The results of XPS analysis showed that oxygen and tungsten ions caused strong chemical oxidation, and the tungsten carbide (WC) friction pair thus exhibited severe friction and wear. The sp3 structures in PDC were transformed into sp2 structures in different friction pairs, and finally a dynamic equilibrium was achieved. Therefore, different friction and wear mechanisms operated in PDC in different friction pairs. These experimental data can promote, by providing a theoretical basis, the use of PDC in friction pairs in actual engineering applications.
AnnealingEvolutionGrinding ballPDC with cobalt removalTribology
Kang C.、Chen J.、Kang G.、Li K.、Luo X.、Gou R.
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School of Mechatronic Engineering Southwest Petroleum University
Pairs Curie Engineer School Beijing University of Chemical Technology
NSTL
Elsevier
