|
| 体育器材铝基复合材料微观组织及性能研究 |
| Microstructure and Properties of Aluminum Matrix Composite for Sports Equipment |
| |
| DOI：10.3969/j.issn.1674-6457.2023.03.005 |
| 中文关键词: 复合材料 微观组织 超声振动 腐蚀速率 耐腐蚀性能 |
| 英文关键词: composite microstructure ultrasonic vibration corrosion rate corrosion resistance |
| 基金项目:广西教育科学规划C类课题(2021C370);广西职业教育教学改革项目(GXGZJG2020B135) |
|
| Hits: 1807 |
| Download times: 833 |
| 中文摘要: |
| 目的 研究不同超声功率对体育器材铝基复合材料微观组织及耐腐蚀性能的影响。方法 以ADC12铝合金和钛纤维为原料，采用超声振动在不同超声功率下制备原位Al3Ti颗粒增强复合材料，利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)和电化学测试技术研究不同超声功率对复合材料微观组织、Al3Ti增强相及耐腐蚀性能的影响。结果 超声振动和原位颗粒增强均可细化复合材料的微观组织，最佳超声功率为750 W，此时复合材料微观组织细化最明显，初生α–Al颗粒平均尺寸最小，形貌最佳，富铁相Al5FeSi和Al3Ti增强颗粒的形貌较佳，分别呈现为短棒状和块状，且分布均匀，腐蚀速率最小，腐蚀表面平坦，腐蚀电位和腐蚀电流密度相比于ADC12铝合金分别上升了14.6%和下降了56.1%。当超声功率过大时，熔体过热容易导致组织粗化，初生α–Al颗粒和Al5FeSi相尺寸增大。复合材料耐腐蚀性能提升的机理是阴极相的细化和均匀分布。结论 通过超声振动原位生成Al3Ti可明显细化复合材料微观组织，提高耐腐蚀性能，当超声功率为750 W时，复合材料微观组织细化最明显，耐腐蚀性能最佳。 |
| 英文摘要: |
| The work aims to study the effect of different ultrasonic power on the microstructure and corrosion resistance of aluminum matrix composite for sports equipment. With ADC12 aluminum alloy and titanium fiber as raw materials, in-situ Al3Ti particle reinforced composite was prepared by ultrasonic vibration under different ultrasonic power. The effects of different ultrasonic power on the microstructure, Al3Ti reinforcement and corrosion resistance of composite were studied by optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and electrochemical testing technology. Ultrasonic vibration and in-situ particle reinforcement could refine the microstructure of the composite. The best ultrasonic power was 750 W. Hence, the microstructure of the composite was refined most obviously. The average size of primary α-Al particles was the smallest and the morphology was the best. The morphology of iron rich phase Al5FeSi and Al3Ti phase was better，which was short rod shape and blocky and distributed uniformly. The corrosion rate was the smallest and the corrosion surface was flat. The corrosion potential and corrosion current density increased by 14.6% and decreased by 56.1% compared with those of ADC12 aluminum alloy. When the ultrasonic power was too large, the overheated melt would easily lead to the coarsening of the microstructure and increase the size of α-Al particles and Al5FeSi phase. The mechanism of improving the corrosion resistance of composite was the refinement and uniform distribution of cathode phase. In-situ Al3Ti particle generated by ultrasonic vibration can obviously refine the microstructure of the composite and improve the corrosion resistance. When the ultrasonic power is 750 W, the microstructure of composite is the most refined and the corrosion resistance is the best. |
|
View Full Text
View/Add Comment Download reader |
| Close |
渝公网安备 50010702501719号