Silicide–carbide composites obtained from alloyed melt infiltration
- 139 Downloads
The development of a Cf/(Mo, Ti)Si2–SiC composite using melt infiltration technique was investigated. C/C preforms and also Cf-felts were infiltrated with an alloyed melt of Si, Ti and MoSi2. The amount of each element was selected so that the melting point of the alloy was lower than 1600 °C. It was then possible to prevent the melt from reacting heavily with the carbon fibers and preserve their reinforcing effect in case of the C/C preforms. After infiltration no residual silicon could be detected in the matrix of the infiltrated C/C composites. The infiltrated C/C samples reached a maximum bending strength of 210 MPa at room temperature. At 1600 °C there is even an increase in their bending strength to 250 MPa. Infiltrated felts showed monolithic and brittle characteristics. Their bending strength at room temperature was not higher than 150 MPa. Because of softening of the residual silicon, the strength of the infiltrated felts was reduced at high temperatures. The felt samples which were infiltrated with an alloyed melt showed higher mechanical strength than pure silicon infiltrated felts both at room temperature and at 1600 °C.
KeywordsCarbon Fiber Interior Part Pure Silicon Free Silicon Load Point Displacement
The authors would like to thank the AiF (Germany) for their supports to the project 13411N.
- 2.Fitzer E, Gadow R (1986) Am Ceram Soc Bull 65(2):325Google Scholar
- 3.Larsen DC, Adams J, Johnson J, Teotia A, Hill L (1985) Ceramic materials for advanced heat engines: technical and economic evaluation. Noyes Publications, Park Ridge, New JerseyGoogle Scholar
- 4.Hering E, Martin R, Stohrer M (1989) Physics for engineers. VDI-Verlag, Düsseldorf, p 171 (in German)Google Scholar
- 9.Tien JK (1989) In: Tien JK, Caufield T (eds) Superalloys, supercomposites and superceramics. Academic Press, BostonGoogle Scholar
- 10.Gadow R, Fitzer E (1987) Am Ceram Soc Bull 2(65):339Google Scholar
- 11.Forrest CW, Kennedy P, Shennan JV (1972) In: Popper P (ed) Special ceramics 5. The British Ceramic Research Association, Stoke on Trent, 99ffGoogle Scholar
- 23.Goller R (1996) Effect of siliconizing on the mechanical properties of a three dimensionally fiber reinforced carbon composite (3d-C/C) considering different fiber-coating systems. Ph.D. Thesis, Clausthal University of Technology (in German)Google Scholar
- 24.Heidenrich B (2003) In: Krenkel W (ed) Ceramic composites. WILEY-VCH, Weinheim, p 48 (in German)Google Scholar
- 26.Watchman JB (1996) Mechanical properties of ceramics. Whiley-Interscience, New YorkGoogle Scholar
- 27.Thomas CR (1993) In: Thomas CR (ed) Essentials of carbon–carbon composites. The Royal Society of Chemistry, Cambridge, p 1Google Scholar
- 28.McEnaney B, Mays T (1993) In: Thomas CR (ed) Essentials of carbon–carbon composites. The Royal Society of Chemistry, Cambridge, p 142Google Scholar