MISC

1994年2月

Elastic constants of some transition- metal- disilicide single crystals

Metallurgical and Materials Transactions A
  • Morihiko Nakamura

25
2
開始ページ
331
終了ページ
340
記述言語
英語
掲載種別
DOI
10.1007/BF02647978
出版者・発行元
Springer-Verlag

The elastic constants, c ij, of VSi2 (C40), CrSi2 (C40), TiSi2 (C54), and CoSi2 (Cl) single crystals were determined at room temperature from the velocities of ultrasonic waves. The orientation dependence of the compliance constants, s11 and s66, and Poisson's ratio were discussed for each disilicide single crystal. Elastic moduli like Young's modulus of ideal polycrystalline com-pounds were estimated from the elastic constants of single crystals using Hill's approximation. The elastic moduli of the disilicides are higher than those of the constituent elements, except for CoSi2. CoSi2 shows a higher Poisson's ratio of 0.36 compared with that of the other dis-ilicides, 0.15 to 0.19. The Young's modulus and the shear modulus of the disilicides increase with increasing melting temperature, and these are located in the upper part of the band indi-cating the elastic moduli-melting temperature relationship in intermetallic compounds. TiSi2, VSi2, CrSi2, and MoSi2 exhibit considerably higher Young's modulus to density ratio, about 70 GPa/(g/cm3), than the constituent elements, except for Si © 1994 The Minerals, Metals and Materials Society, and ASM International.

リンク情報
DOI
https://doi.org/10.1007/BF02647978
ID情報
  • DOI : 10.1007/BF02647978
  • ISSN : 1073-5623
  • ISSN : 1543-1940
  • SCOPUS ID : 0028371486

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