Effect of the Mechanical Alloying and Spark Plasma Sintering on Microstructure, Phase Composition and Chemical Elements Distribution of Nb-Si Based Composite

Abstract

Synthesis of the Nb-Si in-situ composite was attempted by mechanical alloying of element powders in vario-planetary ball mill. The particles size distribution was measured by laser diffraction, microstructures were examined with scanning electronic microscope, and the phase constituent were analyzed by X-ray diffraction. The amorphization of the Si during mechanical alloying, large amount of deformation of Nb crystal structure, and after all – the formation of supersaturated solid solution of Nb was observed. To stabilize microstructure and phase composition, a spark plasma sintering was attempted. After SPS microstructure consist of three main phases – Nbss, Nb5Si3 and Nb3Si.

Additive Manufacturing of Ni36Co37Al27 Ferromagnetic Shape Memory Material Using Mechanically Alloyed Plasma Spheroidized Powders

“…Mechanical alloying (MA) is a comparatively simple and effective technique to obtain a powder of various compositions from pure raw elemental powders. The method of MA followed by PS was successfully applied for other metal alloys in [5].…”

Mechanical properties of extruded mixed components based on aluminum powders and ternary aluminum-containing intermetallic compounds synthesized by various methods

“…As a result of such an introduction, the system will significantly differ from the equilibrium one and will contain significantly more than in accordance with classical phase diagrams, the number of strengthening phases. This content is determined only by the interests of the researcher, aimed at obtaining the best set of strength and service characteristics of the material after thermoplastic processing of the mixtures [1][2][3]. Triple intermetallic (TIM) compounds are found in many industrial alloys based on aluminum Aluminium and have a significant influence on their properties.…”