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Ti-B-Cu and Ti-C-Cu systems are interesting from the viewpoint of the development of ceramic particle-reinforced copper matrix composites. In this work, the phase and structural evolution upon the interaction of Ti 33 Cu 67  and Ti 25 Cu 75  alloys obtained by melt spinning with carbon or boron was studied. The reactions were carried out in the ball-milled mixtures subjected to Spark Plasma Sintering at 900 °C. The products of the reactions were composites containing TiC or TiB 2  nanoparticles distributed in the copper matrix. The in-situ synthesized TiC and TiB 2  nanoparticles were extremely fine (10-20 nm). The distribution pattern of the particles in the matrix was similar in the TiC-Cu and TiB 2 -Cu systems: composite regions were intermixed with copper regions free from the ceramic particles. It was shown that, when the Ti 25 Cu 75  alloy was melted first by heating up to 900 °C and then forced to interact with carbon, TiC particles two orders of magnitude larger in size grew in the copper matrix.

Synthesis of Nano-Sized TiB2 and TiC Particles During Spark Plasma Sintering of Ball-Milled Ti-Cu Alloy + B(C) and Ti+Cu+B mixtures

Synthesis of Nano-Sized TiB₂ and TiC Particles During Spark Plasma Sintering of Ball-Milled Ti-Cu Alloy + B(C) and Ti+Cu+B mixtures