Effects of pH Values and H 2 O 2 Concentrations on the Chemical Enhanced Shear Dilatancy Polishing of Tungsten
In order to obtain tungsten with great surface qualities and high polishing efficiency, a novel method of chemical enhanced shear dilatancy polishing (C-SDP) was proposed. The effects of pH values and H O concentrations on the polishing performance of tungsten C-SDP were studied. In addition, the co...
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Veröffentlicht in: | Micromachines (Basel) 2022-05, Vol.13 (5) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In order to obtain tungsten with great surface qualities and high polishing efficiency, a novel method of chemical enhanced shear dilatancy polishing (C-SDP) was proposed. The effects of pH values and H
O
concentrations on the polishing performance of tungsten C-SDP were studied. In addition, the corrosion behaviors of tungsten in solutions with different pH values and H
O
concentrations were analyzed by electrochemical experiments, and the valence states of elements on the tungsten surface were analyzed by XPS. The results showed that both pH values and H
O
concentrations had significant effects on tungsten C-SDP. With the pH values increasing from 7 to 12, the
increased from 6.69 µm/h to 13.67 µm/h. The optimal surface quality was obtained at pH = 9, the surface roughness (
) reached 2.35 nm, and the corresponding
was 9.71 µm/h. The
increased from 9.71 µm/h to 34.95 µm/h with the H
O
concentrations increasing from 0 to 2 vol.%. When the concentration of H
O
was 1 vol.%, the
of tungsten reached the lowest value, which was 1.87 nm, and the
was 26.46 µm/h. This reveals that C-SDP technology is a novel ultra-precision machining method that can achieve great surface qualities and polishing efficiency of tungsten. |
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ISSN: | 2072-666X 2072-666X |