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首页> 外文期刊>Journal of Materials Engineering and Performance >Al-MoSi2 Composite Materials: Analysis of Microstructure, Sliding Wear, Solid Particle Erosion, and Aqueous Corrosion
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Al-MoSi2 Composite Materials: Analysis of Microstructure, Sliding Wear, Solid Particle Erosion, and Aqueous Corrosion

机译：Al-MoSi2复合材料：微观结构，滑动磨损，固体颗粒腐蚀和水腐蚀的分析

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In this effort, AMCs reinforced with new intermetallic phases, were produced through casting and compared as far as their microstructure, sliding wear, solid particle erosion, and aqueous corrosion response. Casting was selected as a production method based on the concept: (a) ease-to-handle and low cost production route and (b) optimum homogeneity of the reinforcing phase distribution. The MoSi2 phase was produced through vacuum arc melting and the resulting drops were milled for 30 h to produce fine powder, the characteristics of which were ascertained through SEM-EDS and XRD analysis. MoSi2 was used as precursor source for the final reinforcing phase. The powder material was incorporated in molten Al1050 alloy to additions of 2, 5 and 10 vol.% respectively. Extensive reactivity between the molten Al and the MoSi2 particles was observed, leading to the formation of new reinforcing phases mainly of the Al-Mo system. In all cases, a uniform particle distribution was observed, mainly characterized by isolated intermetallic phases and few intermetallic phase clusters. Sliding wear showed a beneficial action of the reinforcing phase on the wear of the composites. Surface oxidation, plastic deformation, crack formation, and debris abrasive action were the main degradation features. The results of solid particle erosion showed that the mechanism is different as the impact angle and the vol.% change. Regarding the corrosion, the analysis revealed localized corrosion effects. The composite behavior was not altered significantly compared to that of the monolithic matrix.
机译：在这项工作中，通过铸造生产了采用新型金属间相增强的AMC，并对其微观结构，滑动磨损，固体颗粒腐蚀和水腐蚀响应进行了比较。根据以下概念选择铸造作为生产方法：（a）易于操作和低成本的生产路线，以及（b）增强相分布的最佳均质性。通过真空电弧熔化产生MoSi2相，并将所得的液滴研磨30小时以产生细粉，通过SEM-EDS和XRD分析确定其特性。 MoSi2用作最终增强阶段的前体来源。将粉末材料分别加入熔融的Al1050合金中，添加量为2、5和10体积％。观察到熔融的Al和MoSi2颗粒之间存在广泛的反应性，从而导致形成了主要由Al-Mo系统组成的新的增强相。在所有情况下，观察到均匀的颗粒分布，主要特征在于分离的金属间相和很少的金属间相簇。滑动磨损显示出增强相对复合材料磨损的有益作用。表面氧化，塑性变形，裂纹形成和碎屑磨蚀作用是主要的降解特征。固体颗粒侵蚀的结果表明，其机理随冲击角和体积％的变化而不同。关于腐蚀，分析显示出局部腐蚀作用。与整体基质相比，复合材料的行为没有明显改变。

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