Shin Byung-Sue, Hyun Soong-Keun
Department of Materials Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Materials (Basel). 2024 Oct 14;17(20):5015. doi: 10.3390/ma17205015.
Lotus-type porous copper was fabricated using a continuous casting method in pressurized hydrogen and nitrogen gas atmospheres. This study evaluates the effects of process parameters, such as the hydrogen ratio, total pressure, and transference velocity, on the resulting pore structure. A continuous casting process was developed to facilitate the mass production of lotus-type porous copper. To achieve the desired porosity and pore diameter for large-scale manufacturing, a systematic evaluation of the influence of each process parameter was conducted. Lotus-type porous copper was produced within a hydrogen ratio range of 25-50%, a transference velocity range of 30-90 mm∙min, and a total pressure range of 0.2-0.4 MPa. As a result, the porosity ranged from 36% to 55% and the pore size varied from 300 to 1500 µm, demonstrating a wide range of porosities and pore sizes. Through process optimization, it is possible to control the porosity and pore size. The hydrogen ratio and total pressure were found to primarily affect porosity, whereas the hydrogen ratio, transference velocity, and total pressure significantly influenced pore diameter. When considering these parameters together, porosity was most influenced by the hydrogen ratio, whereas the total pressure and transference velocity had a greater influence on pore diameter. Reducing the hydrogen ratio and increasing the transference velocity and total pressure reduced the pore diameter and porosity. This optimization of the continuous casting process enables the control of porosity and pore diameter, facilitating the production of lotus-type porous copper with the desired pore structures.
采用连续铸造法在加压氢气和氮气气氛中制备了莲花型多孔铜。本研究评估了氢气比例、总压力和转移速度等工艺参数对所得孔隙结构的影响。开发了一种连续铸造工艺以促进莲花型多孔铜的大规模生产。为了在大规模制造中实现所需的孔隙率和孔径，对每个工艺参数的影响进行了系统评估。在氢气比例为25 - 50%、转移速度为30 - 90 mm∙min、总压力为0.2 - 0.4 MPa的范围内制备了莲花型多孔铜。结果，孔隙率在36%至55%之间，孔径在300至1500 µm之间变化，展示了广泛的孔隙率和孔径范围。通过工艺优化，可以控制孔隙率和孔径。发现氢气比例和总压力主要影响孔隙率，而氢气比例、转移速度和总压力对孔径有显著影响。综合考虑这些参数时，孔隙率受氢气比例影响最大，而总压力和转移速度对孔径影响更大。降低氢气比例并提高转移速度和总压力会减小孔径和孔隙率。这种连续铸造工艺的优化能够控制孔隙率和孔径，便于生产具有所需孔隙结构的莲花型多孔铜。
