Effect of Ti<sub>3</sub>SiC<sub>2</sub> and Ti<sub>3</sub>AlC<sub>2</sub> Particles on Microstructure and Wear Resistance of Microarc Oxidation Layers on TC4 Alloy
oleh: Gaoyang Gu, Jian Shang, Dan Lin
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-12-01 |
Deskripsi
Microarc oxidation (MAO) layers were prepared using 8g/L Na<sub>2</sub>SiO<sub>3</sub> + 6g/L (NaPO<sub>3</sub>)<sub>6</sub> + 4g/L Na<sub>2</sub>WO<sub>4</sub> electrolyte with the addition of 2g/L Ti<sub>3</sub>SiC<sub>2</sub>/Ti<sub>3</sub>AlC<sub>2</sub> particles under constant-current mode. The roughness, porosity, composition, surface/cross-sectional morphology, and frictional behavior of the prepared MAO layers were characterized by 3D real-color electron microscopy, scanning electron microscopy, X-ray energy spectrometry, X-ray diffractometry, and with a tribo-tester. The results showed that the addition of Ti<sub>3</sub>SiC<sub>2</sub> and Ti<sub>3</sub>AlC<sub>2</sub> to the electrolyte reduced the porosity of the prepared layers by 9% compared with that of the MAO layer without added particles. The addition of Ti<sub>3</sub>SiC<sub>2</sub>/Ti<sub>3</sub>AlC<sub>2</sub> also reduced the friction coefficient and wear rate of the prepared layers by 35% compared with that of the MAO layer without added particles. It was found that the addition of Ti<sub>3</sub>AlC<sub>2</sub> particles to the electrolyte resulted in the lowest porosity and the lowest wear volume.