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Abstract— <p>The paper investigates the regularities of formation of functionally graded composites based on the Ti<sub>3</sub>SiC<sub>2</sub>/bronze system, obtained by extrusion-based additive manufacturing using granular feedstocks. Particular attention is paid to the influence of the component ratio on the rheological behavior of the initial mixtures, the features of gradient structure formation during printing, as well as on the microstructure and phase composition after heat treatment. The Ti<sub>3</sub>SiC<sub>2</sub>/bronze composite is formed by extrusion additive printing followed by sintering at a temperature of 1070°C without significant reactionary phase transformation. With different bronze content in the composite, the structure is represented by Ti<sub>3</sub>SiC<sub>2</sub>, TiC, α-Cu, κ-phase (Fe<sub>3</sub>Al) and β-phase (Cu<sub>3</sub>Al) phases, with an observed tendency for the α-Cu phase to increase as the bronze content increases. It is shown that variation in the content of the metallic component has a complex effect on the material flow process, extrusion stability, and the formation of interfacial boundaries. Limitations on the bronze content are established, due to the characteristics of flow and structure formation: no more than 10&#xa0;vol %. The key mechanisms determining the morphology and properties of the obtained composites are identified.</p>

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Additive Formation of Composite Materials Ti3SiC2/Bronze with a Gradient Change in the Content of Components in Height

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • M. G. Krinitcyn,
  • T. L. Murashkina,
  • A. V. Pirozhkov,
  • E. E. Ryumin

摘要

Abstract—

The paper investigates the regularities of formation of functionally graded composites based on the Ti3SiC2/bronze system, obtained by extrusion-based additive manufacturing using granular feedstocks. Particular attention is paid to the influence of the component ratio on the rheological behavior of the initial mixtures, the features of gradient structure formation during printing, as well as on the microstructure and phase composition after heat treatment. The Ti3SiC2/bronze composite is formed by extrusion additive printing followed by sintering at a temperature of 1070°C without significant reactionary phase transformation. With different bronze content in the composite, the structure is represented by Ti3SiC2, TiC, α-Cu, κ-phase (Fe3Al) and β-phase (Cu3Al) phases, with an observed tendency for the α-Cu phase to increase as the bronze content increases. It is shown that variation in the content of the metallic component has a complex effect on the material flow process, extrusion stability, and the formation of interfacial boundaries. Limitations on the bronze content are established, due to the characteristics of flow and structure formation: no more than 10 vol %. The key mechanisms determining the morphology and properties of the obtained composites are identified.