Open AccessSiC-TiSi2 materials codeposited by CVD
Author(s) -
M. Maline,
F. Teyssandier,
R. Hillel
Publication year - 1993
Publication title -
journal de physique iv (proceedings)
Language(s) - English
Resource type - Journals
eISSN - 1764-7177
pISSN - 1155-4339
DOI - 10.1051/jp4:1993379
Subject(s) - crystallite , extrapolation , materials science , indentation , texture (cosmology) , atmospheric pressure , analytical chemistry (journal) , composite material , mineralogy , chemistry , metallurgy , mathematical analysis , chromatography , computer science , artificial intelligence , image (mathematics) , oceanography , mathematics , geology
SiC - TiSi2 composites were prepared by CVD under atmospheric pressure at 850°C using the TiCl4 - SiH2Cl2 - C4H10 - H2 gas system. Thermodynamical calculation trends, dealing with the influence of the initial gas phase composition on the amount of TiSi2 were compared with the experiments. Codeposits were texture-free. Apparent crystallite size was ranging between 20 to 50nm. Intrinsic hardness deduced from the extrapolation at infinite load of measured values, fitted well with that given by a rule mixture : H∞=VTiSi2.HTiSi2+(l-VTiSi2).HSiC. Using indentation technique, median-radial crack system was observed. Values of toughness were about 35 to 50 % greater than for a pure SiC-CVD depending on the amount of TiSi2
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom