The structure and properties of sinters produced from composite powders Al–Al2O3–Al3Fe–Al3Ti

Decision Support System in the Field of Defects Assessment in the Metal Matrix Composites Castings

“…There are many methods for obtaining this type of composite [2,3,32]. Reinforcement may occur in processes involving the liquid phase (Figure 1) or the solid phase.…”

“…The production of reinforcement from the liquid phase can occur in the process of crystallization, for example, in directional crystallization of eutectic systems, by strong gas supercooling of supersaturated solutions or a rapid reaction between components in the liquid phase. Processes using internal oxidation, substitution reactions or reactive component grinding are methods of producing in situ composites with the participation of the solid phase [2,32]. Production of a composite in a liquid-gas system: (a) scheme: 1-gas, 2-gas lance, 3liquid metal, 4-gas bubbles, 5-crucible; (b) SEM image of the in-situ Al3Mg with N2 composite.…”

“…In the liquid matrix technology, there are two fundamentally varying methods of composite production, such is direct methods, and indirect methods [2,3,8,28,30,32,37,38,[44][45][46][47].…”

“…The layout of the table is similar to that in the Polish Standard [64]. It presents the qualification of a defect into the appropriate subgroup of defects in the structure of metal composite castings, as is described; the scheme is supported by an example of the defect, the causes of defects in the structure of metal composite castings are presented based on the studies [1][2][3]28,32,33,47] and their detection methods in accordance with studies of the authors [1,[39][40][41][42][43][44] is proposed. Table 3 presents a proposal for the division of defects in castings made from traditional materials (cast steel, cast iron, non-ferrous alloys) and composite materials compatible with standard PN-85/H-83105 [67].…”

Aluminothermal Reaction Approach for Micro‐/Nanofabrications: Syntheses of In2O3 Micro‐/Nanostructures and InN Octahedral Nanoshells

“…Al 2 O 3 þ 2Fe, which releases a large amount of heat to attain a temperature higher than 3000 8C, well above the melting points of both iron and Al 2 O 3 . In scientific fields, researchers utilized ATRs to prepare metals [3] and alloys, [4,5] ceramic and composite materials, [6,7] and coating layers. [8] However, all these studies merely concern the utilization of ATRs in the synthesis and processing of materials from solid-state reactions.…”