Abstract

Composite materials (CMs) exhibit high hardness, mechanical strength, and wear resistance, but their processing properties are limited. The most popular reinforcements for composites are carbides, nitrides, and oxides. Amorphous metallic materials are an alternative reinforced component. Metallic glass can provide increased properties due to higher interphase strength between their particles and the metallic matrix when compared with nonmetallic particles. A sheet of metal matrix composite has been processed by roll bonding. The composite consists of an aluminum-based matrix reinforced by particles of Co₄₈Cr₁₅Mo₁₄C₁₅B₆Tm₂ metallic glasses and a cladding layer of AA5083 alloy. The thickness of the central layer of Al–5% Zn–5% Ca alloy reinforced by metallic glasses particles is 60% of the total thickness of the sheet, and the thickness of the cladding layer is 20% on the both sides. Granules of the CM were processed by mechanical alloying with the subsequent consolidation to the balk sheet by roll bonding in clad sheets at the temperature below class transition temperature of the amorphous component. The reinforcement compound retains the amorphous state after mechanical alloying and hot rolling, which is shown by X-ray and differential thermal analysis. The microstructure after different processing steps is studied by scanning electron microscopy and the mechanical properties of the metal matrix composite sheet at room temperature are studied. Amorphous particles have a size range of 2 to 187 μm and volume fraction of about 10%. The hardness of the composites is 25% higher than the hardness of basic alloy Al–5% Zn–5% Ca. The yield strength of the cladded CM is two times higher than that of metallic alloys of the matrix and cladding.

中文翻译：

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热轧结合金属玻璃颗粒增强铝合金基复合材料

摘要

复合材料（CMs）具有较高的硬度，机械强度和耐磨性，但其加工性能受到限制。复合材料最常用的增强材料是碳化物，氮化物和氧化物。非晶态金属材料是替代的增强组件。与非金属颗粒相比，由于金属颗粒与金属基体之间具有更高的相间强度，因此金属玻璃可以提供更高的性能。金属基复合材料片已经通过辊压粘合处理。该复合材料由铝基基体组成，该基体由Co ₄₈ Cr ₁₅ Mo ₁₄ C ₁₅ B ₆ Tm ₂颗粒增强金属玻璃和AA5083合金的覆层。用金属玻璃颗粒增强的Al-5％Zn-5％Ca合金中央层的厚度为薄板总厚度的60％，覆层的厚度在两面均为20％。通过机械合金化处理CM的颗粒，随后在低于非晶态组分的转变温度的温度下，通过在覆层板中辊压粘合而将其固结到阻光板上。机械合金化和热轧后，增强化合物保留了非晶态，这通过X射线和差热分析显示。通过扫描电子显微镜研究了不同加工步骤后的微观结构，并研究了室温下金属基复合片的力学性能。非晶颗粒的大小范围为2至187μm，体积分数约为10％。复合材料的硬度比碱性合金Al–5％Zn–5％Ca的硬度高25％。包层的CM的屈服强度比基体和包层的金属合金的屈服强度高两倍。