Properties of Hybrid-Reinforced Aluminum Matrix Composites for Precision Instruments



Hybrid-reinforcement SiC/Gr/Al composites were fabricated by squeeze-casting technology, to provide a novel solution to machinable materials for precision instruments. The effect of flake graphite particles on mechanical properties, machinability, dimensional stability and coefficient of thermal expansion was studied. With the addition of 5% graphite particles in the SiC/Al composites, the tool life during cutting is prolonged by 40% and the tensile strength, elastic modulus and specific modulus are 405 MPa, 150 GPa and 51 GPa cm3/g respectively. The micro-yield stress of SiC/5%Gr/Al composite is higher than 300 MPa and the linear CTE is 11.6 × 10−6 °C−1. The properties of SiC/Gr/Al composite were in contrast to conventional materials of precision instruments and the advantages in application are discussed.


Precision instrument Aluminum matrix composites Mechanical properties Machinability Micro-yield stress 


  1. 1.
    G.H. Wu, S.L. Ma, R.H. Li, L.T. Jiang, in Chinese Inertial Instruments and Component Academic Conference, Wenzhou, China, 1998Google Scholar
  2. 2.
    C.W. Marschall, R. Maringe, Dimensional Instability (Pergamon Press, New York, 1977)Google Scholar
  3. 3.
    S.L. Ma, F. Yang, G.H. Wu, Y.H. Li, J. Chin. Inert. Technol. 3, 64 (1998)Google Scholar
  4. 4.
    S. Mahdavi, F.J. Akhlaghi, J. Mater. Sci. 46, 1502 (2011)CrossRefGoogle Scholar
  5. 5.
    H.R. Hafizpour, A. Simchi, S. Parvizi, Adv. Powder Technol. 21, 273 (2010)CrossRefGoogle Scholar
  6. 6.
    W.R. Mohn, D. Vukobratorich, J. Mater. Eng. 10, 225 (1988)CrossRefGoogle Scholar
  7. 7.
    W.R. Mohn, SAMPE January/February 26 (1988)Google Scholar
  8. 8.
    F. Bergman, S. Jacobason, Wear 179, 89 (1994)CrossRefGoogle Scholar
  9. 9.
    M. Ei-Gallab, M. Sklad, J. Mater. Process. Tech. 83, 151 (1998)CrossRefGoogle Scholar
  10. 10.
    V. Songmene, M. Balazinski, CIRP Annals—Manufacturing Technology 48, 77 (1999)CrossRefGoogle Scholar
  11. 11.
    J.F. Leng, G.H. Wu, Chin. J. Rare Met. 30, 20 (2006)Google Scholar
  12. 12.
    J.F. Leng, G.H. Wu, Q.B. Zhou, Z.Y. Dou, X.L. Huang, Scripta Mater. 59, 619 (2008)CrossRefGoogle Scholar
  13. 13.
    A.R. Riahi, A.T. Alpas, Wear 251, 1396 (2001)CrossRefGoogle Scholar
  14. 14.
    P.K. Rohatgi, D. Nath, S.S. Singh, J. Mater. Sci. 29, 5975 (1994)CrossRefGoogle Scholar
  15. 15.
    W. Ames, A.T. Alpas, Metall. Mater. Trans. A 26, 85A (1995)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jinfeng Leng
    • 1
  • Qinbo Zhou
    • 2
  • Qiang Zhao
    • 2
  • Gaohui Wu
    • 3
  1. 1.University of JinanJinanChina
  2. 2.Yankuang Light Alloys Company LtdZouchengChina
  3. 3.Harbin Institute of TechnologyHarbinChina

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