АЛЮМОМАТРИЧНІ КОМПОЗИТИ НА ОСНОВІ ЛИВАРНИХ АЛЮМІНІЄВИХ СПЛАВІВ З ОКСИДАМИ ТА КАРБІДАМИ: Procesi littâ, 2025, Vol 1 (159), 48-64

• Дата: 2025
• Автори: Ліхацький, Р.Ф., Ворон, М.М., Нарівський, А.В., Твердохвалов, В.О., Ліхацький, І.Ф., Матвієць, Є.О.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2025
• Теми: литі композиційні матеріали; алюмоматричні композити; оксидні й карбідні добавки; засвоєння армуючих фаз
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/270
• Назва журналу: Casting Processes

The paper considers the technological features of obtaining as-cast aluminum matrix composite materials (AMC), reinforced by oxide and carbide particles Al2O3, ZrO2, TiO2, SiC, B4C and WC. Because of the development of active mixing casting, in-situ synthesis, friction stirring, etc. methods, high-quality composites with favorable structural characteristics and a high level of mechanical properties can be created and obtained. Among many considered methods of obtaining as-cast aluminum matrix composites, one of the most universal and widely used are melt active mixing casting and injection molding. The first method is universal for stirring and distributing reinforcing particles, and the second allows to minimize structure defects and porosity. It has been shown that high dispersion of oxide and carbide additives often leads to negative consequences – defects of non-integration and powders agglomeration. Large particles of reinforcing components, in turn, lead to the formation of pores. Better absorption of powder additives by increasing their wettability ensures by several methods, among which the most effective are their preheating, surface activation, or adding magnesium to the aluminum melt in an amount of up to 1 wt. %. The vast majority of studies are devoted to the creation of AMC based on the A356 alloy. The most popular additives in this case are Al2O3, ZrO2, SiC, B4C and WC. The optimal content of fillers for most of the studied compositions is about 2-6 wt. %. The optimal particle size is within 5-35 microns, which is expressed in an increase in the hardness of the composites. A larger particle size has little effect on the mechanical properties of the alloys, and nanometer sizes can lead to their uneven distribution and defects in the products structure.