Interparticle Interactions during Consolidation of Ti3SiC2–Cu Powders Influenced by Preliminary Mechanical Milling
D. V. DUDINA1, V. YU. ULIANITSKY2, I. S. BATRAEV2, M. A. KORCHAGIN1, V. I. MALI2, A. G. ANISIMOV2 and O. I. LOMOVSKY1
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia)
E-mail: dina1807@gmail.com
2Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Pr. Lavrentyeva 15, Novosibirsk 630090 (Russia)
Pages: 29-36
Abstract
Mechanical milling is widely used for the purpose of efficient mixing of the components of particle-reinforced composite materials, which are further obtained in a bulk form by consolidation of the milled powder mixtures. Using the Ti3SiC2–Cu system as an example of a metal matrix composite with a ductile matrix and a reinforcement phase prone to chemical interaction with the matrix at elevated temperatures, we show that the effect of the preliminary mechanical milling of the components is seen not only in the uniformity of distribution of the reinforcing particles in the matrix but also in the consolidation behavior of the powders. The influence of the presence of composite agglomerates in the milled mixture on the processes induced by heating during consolidation is demonstrated by detonation spraying of the mechanically milled and mixed Ti3SiC2–Cu powders in comparative experiments and Spark Plasma Sintering of the Ti3SiC2–Cu agglomerates of different morphology. Interparticle interactions that are affected by the presence/absence of composite agglomerates and their morphology are the interfacial chemical reactions, the degree of transformation and melting of the copper matrix in the contact regions.
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