http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A Study on Copper Micromachining Using Microorganisms
Istiyanto, Jos,Ko, Tae-Jo,Yoon, Il-Chae 한국정밀공학회 2010 International Journal of Precision Engineering and Vol.11 No.5
Biomachining using microorganisms to remove metal from a workpiece is an alternative technology for machining processes that may have environmental advantages. Studies of the characteristics of micromachining using microorganisms such as Acidithiobacillus ferrooxidans will explore and improve the capabilities of this alternative machining process. The objective of this study is to investigate the surface roughness and the material removal rate characteristics in biomachining of copper for various machining times. We present the biomachining of copper using A. ferrooxidans, including bacterial culturing and workpiece preparation, and a comparison of the surface roughness, visible surface appearance of the workpiece, and material removal rate before and after biomachining process.
Preliminary Study on Biomachining Process of Cooper
Jos Istiyanto(소스 이스티안토),Tae-Jo Ko(고태조),Il-Chae Yoon(윤일채) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
Machining process that use microorganism as the tool to remove metal from a work piece, also known as biomachining, is an alternative technologies in machining process since its environmental advantages. The study of characteristic of micromachining using microorganism such as Acidithiobacillus ferrooxidans is needed to explore and to improve its capability as an alternative machining process. The objective of this study is to characterize the surface roughness, the material removal rate and bacteria concentration in biomachining of cooper for 3 different machining time. Biomachining experiment and the results such as the change of surface roughness of work pieces and Material Removal Rate are presented.
Preliminary Study on Biomachining Process of Cooper
Jos Istiyanto(소스 이스티안토),Tae-Jo Ko(고태조),Il-Chae Yoon(윤일채) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6월
Machining process that use microorganism as the tool to remove metal from a work piece, also known as biomachining, is an alternative technologies in machining process since its environmental advantages. The study of characteristic of micromachining using microorganism such as Acidithiobacillus ferrooxidans is needed to explore and to improve its capability as an alternative machining process. The objective of this study is to characterize the surface roughness, the material removal rate and bacteria concentration in biomachining of cooper for 3 different machining time. Biomachining experiment and the results such as the change of surface roughness of work pieces and Material Removal Rate are presented.
Mohammad Akita Indianto,Iman Santoso,Jos Istiyanto,Tae Jo Ko 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.12
Optimizing material removal rate has been one challenge in developing biomachining, an alternative option for the green machining process for metal substrates. As such, several research papers have tried to seek new knowledge by adjusting biomachining parameters such as temperature, shaking rate, pH, and Fe+ concentration. This research provides new knowledge to optimize the biomachining material removal rate by adding oxygen to the bacteria’s culture. Oxygen is an important factor in the aerobic metabolism of Acidithiobacillus ferrooxidans, the biomachining agent. An air supply system adds oxygen to the bacteria’s culture. The added oxygen successfully enhances the material removal rate of the biomachining process by an average enhancement of about four times through a copper biomachining process. On the other hand, an increment of surface roughness of about two times was also observed. These effects of oxygen are important findings to overcome the low material removal rate of the biomachining. On a further note, to optimize the biomachining process, this process should be combined with other known parameters such as temperature, shaking rate, pH, and Fe+ concentration. An optimized process of biomachining will have a wide range of material removal rates and surface roughness. It can be utilized in MEMS fabrications such as micro/nano copper antennas, micro heat exchangers, and lab-on-chip devices.