caa a22 4500 463212746 CHVBK 20180405153146.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00339-007-4253-9 doi (NATIONALLICENCE)springer-10.1007/s00339-007-4253-9 A preservation study of carbon nanotubes in alumina-based nanocomposites via Raman spectroscopy and nuclear magnetic resonance [Elektronische Daten] [K.E. Thomson, Dongtao Jiang, R.O. Ritchie, A.K. Mukherjee] Raman spectroscopy was used to study the preservation of the carbon nanotube structure in nanotube-reinforced alumina nanocomposites consolidated via spark plasma sintering (SPS). A series of Raman spectroscopy experiments was used to identify the thermal breakdown temperature of single-walled carbon nanotubes (SWCNTs) embedded in nanocrystalline alumina. It was found that the carbon nanotube structure remains intact after sintering at 1150°C, but almost completely breaks down by 1350°C after only 5min. Also, 27Al nuclear magnetic resonance (NMR) was used to study the chemical and structural effects of high-energy ball milling (HEBM) and SPS consolidation on pure alumina and SWCNT-alumina nanocomposites. HEBM does not change the mixed coordination number of the as-received alumina, but slight peak shifts indicate residual stresses. No Al4C3 was detected in any of the consolidated samples - even up to 1550°C for 10min. Thus, it is concluded that consolidation of carbon nanotube-reinforced composites should be completed at temperatures below ∼1250°C in order to preserve the carbon nanotube structure. Springer-Verlag, 2007 Thomson K.E. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut Jiang Dongtao Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut Ritchie R.O. Department of Materials Science and Engineering, University of California, 94720, Berkeley, CA, USA aut Mukherjee A.K. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut Applied Physics A Springer-Verlag 89/3(2007-11-01), 651-654 0947-8396 89:3<651 2007 89 339 https://doi.org/10.1007/s00339-007-4253-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-4253-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thomson K.E. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 700 1- Jiang Dongtao Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 700 1- Ritchie R.O. Department of Materials Science and Engineering, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Mukherjee A.K. Department of Chemical Engineering and Materials Science, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 89/3(2007-11-01), 651-654 0947-8396 89:3<651 2007 89 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer