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Abstract：
In the present investigation, aluminum metal matrix composites (AMMs) reinforced with aluminum nitride (AlN) nanoparticulates at different volumetric ratios of (0, 0.5, 1, 1.5, and 2 vol.%) were manufactured via a microwave-assisted powder metallurgy technique. The morphological, physical, mechanical, and electrochemical properties of the produced billets were examined to reflect the impact of the successive addition of AlN into the aluminum (Al) matrix. The morphological analysis revealed the high crystalline patterns of the formation of the Al-AlN composites. The microstructural analysis confirmed the presence of the elemental constituents of Al and AlN particles in the fabricated composites, showing an enhanced degree of agglomeration in conjunction with the additional amount of AlN. Positive behavior exhibited by the micro- and nanohardness was noticeable in the Al-AlN composites, especially at the ultimate concentration of AlN in the Al matrix of a 2 vol.%, where it reached 669.4 ± 28.1 MPa and 659.1 ± 11 MPa compared to the pure Al metal at 441.2 ± 20 MPa and 437.5 ± 11 MPa, respectively. A declining trend in the compressive strength was recorded in the reinforced Al samples. The corrosion resistance of the AlN-reinforced Al metal matrix was estimated at 3.5 wt.% NaCl using electrochemical impedance spectroscopy and potentiodynamic polarization. The results reveal that the inclusion of 2.0 vol.%AlN led to the lowest corrosion rate.
摘要：
在目前的调查中,用氮化铝（AlN）纳米颗粒增强的铝金属基复合材料（AMM）以不同的体积比（0、0.5、1、1.5和2vol。%)是通过微波辅助粉末冶金技术制造的。形态学,物理，机械,并检查了生产的坯料的电化学性能，以反映将AlN连续添加到铝（Al）基体中的影响。形态分析揭示了Al-AlN复合材料形成的高结晶模式。微观结构分析证实了制造的复合材料中存在Al和AlN颗粒的元素成分，结合AlN的额外量显示出增强的团聚程度。在Al-AlN复合材料中，微米和纳米硬度表现出的积极行为是显而易见的，特别是在Al基体中AlN的最终浓度为2vol时。%,与纯Al金属在441.2±20MPa和437.5±11MPa时相比，它达到了669.4±28.1MPa和659.1±11MPa，分别。在增强的Al样品中记录到抗压强度的下降趋势。AlN增强的Al金属基体的耐腐蚀性估计为3.5wt。%NaCl采用电化学阻抗谱和动电位极化。结果表明，包含2.0vol。%AlN导致腐蚀速率最低。
