Abstract
Molybdenum disilicide-titanium trisilicide (MoSi2-Ti5Si3) is a ceramic matrix composite (CMC) created for the purpose of improving the mechanical properties of molybdenum disilicide. Five alloys of this CMC were prepared by varying the ratio of volume per cent Ti5Si3 to volume per cent MoSi2. Evaluation of the specimens using the piezoelectric ultrasonic composite oscillator technique (PUCOT) determined the values of Young's modulus to range from 303 to 378 GPa at room temperature increasing with volume fraction of MoSi2. The values of Young's modulus for temperatures up to about 400 °C for each alloy decrease linearly with respect to increasing temperature. Damping within the specimens is independent of strain amplitude at room temperature, but shows some strain amplitude dependence at higher temperatures. The values of density for the alloys, determined using Archimedes' method, range from about 5200 to 5900 kg m−3, and compare favourably with the values determined by the rule of mixtures.
Similar content being viewed by others
References
J. J. Petrovic and R. E. Honnell, MRS Bull. XVIII (1993) 35.
J. J. Petrovic and A. K. Vasudevan, MRS Symp. Proc. 273 (1992) 229.
P. Villars and L. D. Calvert, “Pearson's Handbook of Crystallographic Data for Intermetallic Phases”, Vol. 3 (American Society for Metals, Metals Park, OH 1985).
J. Marx, Rev. Sci. Instrum. 22 (1951) 503.
W. H. Robinson and A. Edgar, IEEE Trans. Sonics Ultrason. SU-21 (1974) 98.
M. R. Harmouche and A. Wolfenden, J. Test. Eval. 13 (1985) 424.
Idem, ibid. 15 (1987) 101.
J. C. Lee and K. N. Subramanian, J. Mater. Sci. 28 (1993) 1578.
H. E. Boyer and T. L. Gall (eds), “Metals Handbook”, Desk Ed (American Society for Metals, Metals Park, OH, 1985).
M. Nakamura, S. Matsumoto and T. Hirano, J. Mater. Sci. 25 (1990) 3309.
J. Friedel, in “Dislocations” (Pergamon Press/Addison-Wesley, Reading, MA, 1964) Appendix B.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wolfenden, A., Bauer, K.J. & Petrovic, J.J. Investigation of dynamic Young's modulus for molybdenum disilicide-titanium trisilicide (MoSi2-Ti5Si3). JOURNAL OF MATERIALS SCIENCE 31, 242–245 (1996). https://doi.org/10.1007/BF00355151
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00355151