Material Removal Mechanisms of Cu-Co Metal-Powder Composite by Microorganisms
- Resource Type
- Article
- Authors
- Fei Ma; Hui Huang; Xipeng Xu
- Source
- International Journal of Precision Engineering and Manufacturing-Green Technology, 7(5), pp.975-986 Sep, 2020
- Subject
- 기계공학
- Language
- English
- ISSN
- 2198-0810
2288-6206
Material characteristics of pure copper, pure cobalt and Cu–Co metal-powder composite were comparative studied through biomachining by Acidithiobacillus ferrooxidans (A. ferrooxidans) in three groups of culture solutions. Material removal mechanisms of Cu–Co metal-powder composite involved in biomachining were explored. It was first observed that the pure cobalt and Cu–Co metal-powder composite were machined by the A. ferrooxidans. The material removal of three workpieces presented linear increase along the machining process due to the metabolic activity of the A. ferrooxidans. Different with the pure metal, the material removal mechanism of Cu–Co metal-powder is explained by the dual eff ect of micro-galvanic corrosion and participation of Cu 2+ and Fe 3+ for oxidization of cobalt.