Singla Isha, Kumar Himanish, Pahlevani Farshid, Handoko Wilson, Cholake Sagar T, Hossain Rumana, Sahajwalla Veena
Centre for Sustainable Materials Research and Technology (SMART), School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia.
Exchange student from Department of Materials and Metallurgical Engineering, Punjab Engineering College, Chandigarh (deemed to be University), Chandigarh, India.
Sci Rep. 2019 Feb 7;9(1):1559. doi: 10.1038/s41598-018-38120-2.
When corrosion is the dominant failure factor in industrial application and at the same time high mechanical properties are required, aluminum bronze is one of the best candidates. Hence, there is a continuous quest for increasing the lifetime of aluminum bronze alloys through enhancing the abrasion and corrosion resistance. Existing methods are based on modifying the bulk properties of alloy or surface modification which required sophisticated equipment and process control. This approach has limited application for advanced components because of high price and difficulty to apply. In this research, we developed an innovative approach to enhance the corrosion and abrasion resistance of aluminum bronze through selective surface diffusion process. In this process, we have used waste materials as input and the modified surface has formed in a single and green process. New surface structure consists of finely dispersed kappa phase (χ ) in uniform alpha (α) solid solution matrix. Results have demonstrated that this uniform diffused modified surface layer has improved hardness of the base material and both corrosion and abrasion resistance has increased. This novel surface modification technique has opened a pathway for using waste materials as input for surface modification of aluminum bronze to meet the needs of industrial applications in a cost effective and environmentally friendly way.
在工业应用中，当腐蚀是主要失效因素且同时需要高机械性能时，铝青铜是最佳选择之一。因此，人们一直在寻求通过提高耐磨性和耐腐蚀性来延长铝青铜合金的使用寿命。现有方法基于改变合金的整体性能或进行表面改性，这需要复杂的设备和工艺控制。由于价格高昂且应用困难，这种方法在先进部件中的应用有限。在本研究中，我们开发了一种创新方法，通过选择性表面扩散工艺提高铝青铜的耐腐蚀性和耐磨性。在这个过程中，我们使用废料作为输入，在单一的绿色过程中形成改性表面。新的表面结构由均匀的α固溶体基体中精细分散的κ相（χ）组成。结果表明，这种均匀扩散的改性表面层提高了基体材料的硬度，同时提高了耐腐蚀性和耐磨性。这种新型表面改性技术为利用废料作为铝青铜表面改性的输入材料开辟了一条途径，以经济高效且环保的方式满足工业应用的需求。
