EFFECT OF Ni AND Cu INTERMEDIATE LAYERS ON THE SINTERABILITY OF A Ti-35SI-10MG (%AT.) MIXTURE SYNTHESIZED BY MECHANICAL ALLOYING
authors Caetano, M; Oliveira, FJ; Silva, RF; Simoes, F; Trindade, B
nationality International
journal REVIEWS ON ADVANCED MATERIALS SCIENCE
keywords TI5SI3; CONSOLIDATION
abstract A Ti-35Si-10Mg (at.%) mixture was synthesized by mechanical alloying from Ti, Mg, and Si elemental powders. After milling the surface of the particles was chemically modified by the deposition of Ni and Cu thin layers by d.c. magnetron sputtering. Coated and uncoated particles were subsequently consolidated by two different routes: (i) cold isostatic pressing followed by pressureless sintering at T = 1300 degrees C in vacuum and (ii) cold isostatic pressing followed by hot isostatic pressing at T = 900 degrees C with an applied pressure of 1500 MPa. The results showed that all samples were formed by a final Ti(3)Si(5) + Mg(2)Si microstructure. Cu and Ni existed as single phases after hot isostatic pressing. Ni and Cu coatings acted as auxiliary sintering elements during compaction of the mechanically alloyed Ti-35Si-10Mg powders, giving rise to better final compacts. The higher values of hardness and Young's modulus were obtained for the HIP'ed coated samples, as result of their better densification.
publisher INST PROBLEMS MECHANICAL ENGINEERING-RUSSIAN ACAD SCIENCES
issn 1606-5131
year published 2009
volume 21
issue 2
beginning page 173
ending page 182
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000272347200006
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