Enhanced mechanical properties of nanostructured TiSi2-NbSi2 composite rapidly sintered by pulsed current activated heating

Title
Enhanced mechanical properties of nanostructured TiSi2-NbSi2 composite rapidly sintered by pulsed current activated heating
Authors
곽봉원김병수윤진국홍경태손인진
Keywords
Composites; Nanostructures; Sintering; Synthesis; Mechanical properties
Issue Date
2015-06
Publisher
Journal of ceramic processing research
Citation
VOL 16, NO 3, 340-345
Abstract
Despite of many attractive properties, the low fracture toughness of refractory metal silicides limits their wide application. One of the most obvious tactics to improve the mechanical properties has been to make fabrication of a nanostructured material and composite material. Nanopowders of Ti, Nb, and Si were fabricated by high-energy ball milling. A dense nanostructured TiSi2-NbSi2 composite was simultaneously synthesized and sintered by the pulsed current activated sintering method within three minutes using mechanically activated powders of Ti, Nb, and Si. A high-density TiSi2-NbSi2 composite was produced under simultaneous application of an 80-MPa pressure and a pulsed current. The hardness and fracture toughness of the nanostructured TiSi2-NbSi2 composite were higher than those of monolithic TiSi2 or NbSi2. This is believed to suggest that TiSi2 and NbSi2 in the composite may deter the propagation of cracks and TiSi2 and NbSi2 have a nanocrystalline.
URI
http://pubs.kist.re.kr/handle/201004/51099
ISSN
12299162
Appears in Collections:
KIST Publication > Article
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