Al-matrix composite based on Al-Ca-Ni-La system additionally reinforced by L12 type nanoparticles

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

“…Since the volume fraction of the eutectic particles is close in all alloys-9-11%, the alloys differ mainly in the properties of the eutectic. The hardness of particles increases in the following order: Al 11 Ce 3 , Al 11 La 3 , and Al 3 Ni-3.5, 4.0, and 7.0-7.7 GPa, respectively [5,[36][37][38]. In this case, the particle refinement process can occur simultaneously with the structure formation during SPD.…”

“…The widely used hypereutectic silumins (alloys of the Al-Si system) have a number of significant disadvantages, namely, embrittlement, the need for modification during melting, and reduced thermal conductivity. Developed in recent years, the multicomponent eutectic alloys based on the systems such as aluminum-calcium (light, corrosion-resistant), aluminum-cerium and aluminum-lanthanum (heat-resistant), aluminum-nickel (highstrength and heat-resistant) are very promising for practical use [2][3][4][5][6]. These alloys are highly technological in casting, since they have narrow crystallization intervals, and they are easily deformed in the annealed state, despite the large fraction (over 10% by volume) of intermetallic phases in the structure.…”

Ca-modified Al–Mg–Sc alloy with high strength at elevated temperatures due to a hierarchical microstructure

“…On the other hand, the fineness of the as-cast eutectic structure also determines the likelihood of a morphology change during a heat treatment. In this alloy, the lateral dimensions of the Al 4 Ca are a little bigger than those reported in other Al-Ca alloys [32,38]. The thickness of the Al 4 Ca crystals is about 1*2lm.…”

“…It can be observed that with increasing aging time, the network structure of the Al 4 Ca phase remained like that of the as-cast samples and did not change significantly. Even after aging at 450°C for 36 hours, no changes in the morphology of Al 4 Ca, indicative of granular transformation or spheroidization [32,38], were observed. Only a small amount of short rod-shaped newly formed precipitates was recorded, as shown in Fig.…”

Al–Ca, Al–Ce, and Al–La Eutectic Aluminum Alloys Processed by High‐Pressure Torsion

“…There are works on the study of eutectic alloys of Al-Ca, Al-Ca-Si, Al-Ca-Fe, Al-Ca-Mn, Al-Ca-Si-Fe, Al-Ca-Mn-Fe, and Al-Ca-Si-Fe-Zr systems in the pre-eutectic and eutectic regions, as well as alloys based on Al-Ni, Al-Ce, Al-Ce-Ni, Al-Ce-Cu, Al-La-Ni, and others. [3][4][5][6] The two-component base eutectic aluminum alloys (Al-Ca, Al-Ce, Al-La, etc.) are fundamentally different from other eutectic aluminum alloys, for example, Al-Cu or Al-Si, by their insolubility in the solid state according to the equilibrium phase diagram.…”