Paper Title:
Fabrication and Physical Properties of SiC-GaAs Nano-Composites
  Abstract

Nano-composites consisting of a primary matrix phase of hard nanocrystalline SiC and a secondary nanocrystalline GaAs semiconductor phase were obtained by high-pressure zone infiltration. The synthesis occurs in three stages: (i) at room- temperature the SiC nanopowder is compacted under high pressure to 8 GPa, (ii) the temperature is increased to 1240°C, above the melting point of GaAs, and the pores were filled with liquid, (iii) on cooling GaAs nanocrystallites grow in the pores. The synthesis was performed using a toroid-type high-pressure apparatus (IHPP PAS, Warsaw) and a six anvil cubic press (MAX80 at HASYLAB, Hamburg). X-ray diffraction studies were performed with a laboratory D5000 Siemens diffractometer. The phase compositionn, grain size and macrostrains in the synthesized materials were examined. The microstructure of the composites was characterized using a Scanning Electron Microscopy (SEM), and High Resolution Transmission Electron Microscopy (TEM). Far-infrared reflectivity and Raman spectroscopy measurements were used to trace built-in strains.

  Info
Periodical
Solid State Phenomena (Volume 114)
Edited by
Witold Lojkowski and John R. Blizzard
Pages
297-302
DOI
10.4028/www.scientific.net/SSP.114.297
Citation
G. Kalisz, E. Grzanka, D. Wasik, A. Swiderska-Sroda, S. Gierlotka, J. Borysiuk, M. Kaminska, A. Twardowski, B. F. Palosz, "Fabrication and Physical Properties of SiC-GaAs Nano-Composites", Solid State Phenomena, Vol. 114, pp. 297-302, 2006
Online since
July 2006
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$32.00
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