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Efeito da moagem de alta energia na morfologia e compressibilidade do compósito Mo-30%Cu

2009; UNIVERSIDADE DO VALE DO RIO DOS SINOS; Volume: 5; Issue: 2 Linguagem: Inglês

10.4013/ete.2009.52.01

1808-7310

Camila Torres, Fábio Luis Knewitz, Wilberth Luna, Alexandre da Silva Rocha, Lírio Schaeffer,

Powder Metallurgy Techniques and Materials

The purpose of this work is to analyze the effects of high energy milling on the granulometry, powder morphology and compressibility of Mo-Cu composite. The Mo-Cu composite combines high mechanical strength of Mo with the high thermal and electrical conductivity of Cu. These characteristics are important to heat sink and electrical conductors. The high energy milling produces composite powders with high homogeneity and refines the grain size. The synthesis of Mo-30Cu composite, starting from powders of Mo and Cu, was realized for milling times of 1, 4, 8, 16 and 32 hours. Scanning electron microscopy and laser granulometry were used to follow the influence of milling time on the microstructure. This allowed to observe the morphological evaluation and interaction between the elements of the material produced. The results show that the particle size and compressibility decreased with the milling time, which shows the viability to obtain this composite by the proposed process. Key words: conventional powder metallurgy, Mo-Cu composite, high energy milling.