當前十年的大部分研究都集中在提高車輛性能和發動機效率上。 材料的選擇在決定產品的質量、成本和環保方面起著重要作用。 近年來，鎂合金作為鑄鐵、鋁和聚合物的替代品越來越受歡迎。 鎂金屬基複合材料可以提供值得注意的特性，因為它具有輕質特性和高強度重量比。 在本研究中，採用攪拌鑄造法從鎂合金 AZ31 和五氧化二鈮 (Nb2O5) 增強材料中製備金屬基複合材料。 鑄造樣品在 410°C 下均勻化 24 小時，突然淬火，然後在 200°C 下時效 10 小時，然後在爐中冷卻至室溫。 應用等通道角壓 (ECAP) 技術使老化樣品變形。 使用配備能譜儀 (EDS) 的掃描電子顯微鏡 (SEM) 研究 Nb2O5 顆粒、熱處理和嚴重塑性變形對微觀結構的影響，並使用 X 射線衍射 (XRD) 探針檢查 相組成。 維氏硬度計和 MTS-100 萬能測試儀用於測量複合材料的機械性能。 AZ31/Nb2O5 納米複合材料是通過用 100 nm Nb2O5 和 3 wt. 增強 AZ31B 製備的。 % 和 6 重量。 ％ 分別。 結果表明，Nb2O5 納米粒子分佈均勻，增強材料與基體之間具有有效的附著力，孔隙率極小，表明該加工方法是有效的。 Nb2O5 顆粒的加入顯著改變了整體式 AZ31 合金的微觀結構。 顯微組織分析表明復合材料主要由初生α-鎂相和相β-Mg17Al12二次相組成。 AZ31/ Nb2O5 納米複合材料顯示晶粒尺寸及其層狀形狀 (β-Mg17Al12) 逐漸細化。 由於在鑄態、時效和 ECAP 樣品中添加 Nb2O5 顆粒，複合材料的硬度、強度和延展性等機械性能顯著提高。

Most research in the current decade is focused on improving the performance of vehicles and the efficiency of engines. The choice of material plays a significant role in determining the quality, cost, and environmentally friendly aspects of a product. In recent years, magnesium alloys have become increasingly popular as alternatives to cast iron, aluminum, and polymers. A magnesium metal matrix composite can provide noteworthy attributes because of its lightweight properties and high strength-to-weight ratio. In the present study, the stir casting method was used to fabricate a metal matrix composite from magnesium alloy AZ31 and Niobium Pentoxide (Nb2O5) reinforcement. As cast sample was homogenized at 410°C for 24 hours, quenched suddenly, then aged at 200°C for 10 hours, and then allowed to cool in the furnace to room temperature. An equal channel angular pressing (ECAP) technique was applied to deform aged samples. A scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS) was used to study the effects of Nb2O5 particles, heat treatment, and severe plastic deformation on the microstructures, and an X-ray diffraction (XRD) probe was utilized to examine the phase compositions. A Vicker hardness tester and an MTS-100 universal tester were used to measure the composite's mechanical properties. AZ31/Nb2O5 nano-composites had been prepared by reinforcing AZ31B with 100 nm Nb2O5 with 3 wt. % each and 6 wt. % respectively. The results showed uniform distribution of Nb2O5 nanoparticles, effective adhesion between reinforcement and matrix, and minimal porosity, suggesting the processing methodology was effective. The inclusion of the Nb2O5 particles altered the monolithic AZ31 alloy microstructures significantly. The microstructure analysis showed that the composites are mainly composed of the primary α-magnesium phase and phase β-Mg17Al12 secondary phase. The AZ31/Nb2O5 nanocomposites revealed that the grain size and its lamellar shape (β-Mg17Al12) were gradually refined. The mechanical properties such as hardness, strength, and ductility of the composites were significantly enhanced due to the addition of Nb2O5 particles in the as-cast condition, aged and ECAP samples.

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