Novel Functionally Gradient Composites Al2O3-Cu-Mo Obtained via Centrifugal Slip Casting

Abstract

The investigations applied the original concept of the formation of materials as hybrid gradient composites. Two innovative technologies were used: formation by centrifugal slip casting and sintering with varying proportions of the liquid phase. This allowed us to create a gradient microstructure. This article presents the study of Al2O3-Cu-Mo gradient composites. This work aimed to determine the effect of the metallic phase content on the composite’s microstructure and basic properties. The most critical element of the study will be determining the ability to control the location and flow of the liquid phase during the sintering process. The research demonstrated that adding a third component in the form of Mo reduces the liquid Cu flow onto the surface of the composites during the sintering process. In this research, we achieve results with high cognitive value. Graphic Abstract

Recent Trends in Casting Technology of Functionally Graded Metallic Alloys

“…FGMs are considered a new type of composite materials which exhibit a continuous change of properties along at least one direction due to the gradient distribution of their phases to achieve the needs of applications originating from industrial growth [1,[3][4][5]. Variations in chemical composition, size, morphology, and structure as a function of location influence the modification of functional and structural qualities [6][7][8][9]. As a result, FGMs outperformed and were more attractive than traditional composite materials.…”

“…FGMs are a novel type of heterogeneous composite materials defined by a continuous change of characteristics in at least one direction to achieve the demands of industrial applications [1,[3][4][5]. Variations in chemical composition, size, morphology, and structure as a function of location influence their functional and structural alterations [6][7][8][9]. They can either be a smooth gradient for homogeneous mixes or a sharp gradient for heterogeneous mixtures [10].…”

Al2O3-Cu-Ni Composites Manufactured via Uniaxial Pressing: Microstructure, Magnetic, and Mechanical Properties

“…Therefore, research on the fabrication of composites that include copper as a metallic filler is still ongoing. The published research results showed that adding additional metallic components such as Cr, Mo, W, or Ni prevents leakage of liquid copper during sintering [16][17][18][19][20][21].…”