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| 1 | 体育器材铝基复合材料微观组织及性能研究显示文摘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Al_(5)FeSi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Al_(5)FeSi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。 | 覃明路 王利春 | 2023 | 精密成形工程2023，15，3： | 1 |
| 2 | 自生TiB_(2)-TiC_(x)/7075Al基复合材料显微组织与力学性能研究显示文摘为了探究7075Al合金综合力学性能,采用高能球磨的方法制备自生TiB_(2)-TiC_(x)增强相,并结合热压烧结的方法制备了w(TiB_(2)-TiC_(x))分别为10%、20%、30%和40%的TiB_(2)-TiC_(x)/7075Al基复合材料,对其物相组成、微观组织、硬度和室温压缩性能进行了测试分析。微观组织测试结果表明:该复合材料的物相主要由Al(Zn,Mg,Cu)固溶体相、TiB_(2)、TiC_(x)及少量Ti_(3)B_(4)和B_(4)C相构成,且w(TiB_(2)-TiC_(x))=20%的TiB_(2)-TiC_(x)/7075Al基复合材料组织相对较为均匀,当TiB_(2)-TiC_(x)含量继续增至30%以上时,TiB_(2)-TiC_(x)在基体中产生团聚。力学性能测试结果表明:随着TiB_(2)-TiC_(x)含量的增加,复合材料的硬度呈现上升的趋势,抗压强度呈先增后减的趋势,TiB_(2)-TiC_(x)含量为20%时,抗压强度达到最大值为796.5 MPa,硬度为273.5 HV,与未添加TiB2 TiCx的7075铝合金相比,硬度提高了239.7%。 | 卫佳乐 白亚平 刘萌萌 李建平 | 2022 | 西安工业大学学报2022，42，3： | 1 |
| 3 | High corrosion and wear resistant electroless Ni–P gradient coatings on aviation aluminum alloy parts显示文摘A Ni–P alloy gradient coating consisting of multiple electroless Ni–P layers with various phosphorus contents was prepared on the aviation aluminum alloy. Several characterization and electrochemical techniques were used to characterize the different Ni–P coatings’ morphologies, phase structures, elemental compositions, and corrosion protection. The gradient coating showed good adhesion and high corrosion and wear resistance, enabling the application of aluminum alloy in harsh environments. The results showed that the double zinc immersion was vital in obtaining excellent adhesion (81.2 N). The optimal coating was not peeled and shredded even after bending tests with angles higher than 90°and was not corroded visually after 500 h of neutral salt spray test at 35℃. The high corrosion resistance was attributed to the misaligning of these micro defects in the three different nickel alloy layers and the amorphous structure of the high P content in the outer layer. These findings guide the exploration of functional gradient coatings that meet the high application requirement of aluminum alloy parts in complicated and harsh aviation environments. | Bo Wang Jiawei Li Zhihui Xie Gengjie Wang Gang Yu | 2024 | International Journal of Minerals,Metallurgy and Materials2024，31，1： | 0 |
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