TY - GEN
T1 - Densification and fracture characteristics of spark plasma sintered copper-CNT-ruthenium composites
AU - Sule, R.
AU - Olubambi, P. A.
AU - Sigalas, I.
AU - Asante, J. K.O.
AU - Garrett, J. C.
PY - 2014
Y1 - 2014
N2 - This paper is focused on the study of Carbon Nanotubes dispersion into Copper matrix, densification and of fracture surfaces of copper-(ruthenium)-carbon nanotube composites processed by SPS, of potential use in thermal management applications. Two volume percent (2 vol%) multiwall CNTs and 0.5 vol% Ru were dispersed into copper powders using mechanical stirring process. The powders were initially annealed for 30 minutes, in argon, at 550°C with heating rate of 5°C/min to reduce oxygen content that could exist as CuO on Cu powder particles, by its thermal decomposition. The annealed powders were then consolidated using Spark Plasma Sintering (SPS) at 600 and 650°C under a pressure of 50 MPa with heating rate of 800C/min and holding time of 5min. The relative density of 98.15% was obtained for Cu-2vol%CNT while that of Cu-2vol%CNT-0.5vol% Ru was of 97.08 %. The coefficient of thermal expansion of 5.7×10-6/K was measured for 2vol%CNT containing composites.
AB - This paper is focused on the study of Carbon Nanotubes dispersion into Copper matrix, densification and of fracture surfaces of copper-(ruthenium)-carbon nanotube composites processed by SPS, of potential use in thermal management applications. Two volume percent (2 vol%) multiwall CNTs and 0.5 vol% Ru were dispersed into copper powders using mechanical stirring process. The powders were initially annealed for 30 minutes, in argon, at 550°C with heating rate of 5°C/min to reduce oxygen content that could exist as CuO on Cu powder particles, by its thermal decomposition. The annealed powders were then consolidated using Spark Plasma Sintering (SPS) at 600 and 650°C under a pressure of 50 MPa with heating rate of 800C/min and holding time of 5min. The relative density of 98.15% was obtained for Cu-2vol%CNT while that of Cu-2vol%CNT-0.5vol% Ru was of 97.08 %. The coefficient of thermal expansion of 5.7×10-6/K was measured for 2vol%CNT containing composites.
UR - http://www.scopus.com/inward/record.url?scp=84959055430&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84959055430
T3 - Euro PM 2014 Congress and Exhibition, Proceedings
BT - Euro PM 2014 Congress and Exhibition, Proceedings
PB - European Powder Metallurgy Association (EPMA)
T2 - Euro PM 2014 International Conference and Exhibition
Y2 - 21 September 2014 through 24 September 2014
ER -