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Fracture Toughness and Microstructure of Nial-Based Composite with TiC Reinforcement

Published online by Cambridge University Press:  22 February 2011

Z. P. Xing ,
J. T. Guo ,
J. Y. Dai ,
L. G. Yu ,
Z. Q. Hu ,
G. Y. An  and
Q. Y. Chen
Z. P. Xing
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R.China.
J. T. Guo
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China
J. Y. Dai
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China
L. G. Yu
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China
Z. Q. Hu
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China
G. Y. An
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P.R.China.
Q. Y. Chen
Affiliation:
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P.R.China
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Abstract

Fracture toughness of NiAl–based composite reinforced by TiC particulate was measured using single–edge notched three–point bend specimens. The composite was fabricated by HPES (hot pressing aided exothermic synthesis) technique. It is shown that the ambient toughness of stoichiometric NiAl was increased from 5.9 MPa m1/2 to 8.9 MPa m1/2 by incorporating 20 vol.% TiC particulates. From fracture surface analysis along with the high–resolution electron microscopy (HREM) observation, toughening mechanisms of the NiAl–TiC composite were also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 567
Copyright
Copyright © Materials Research Society 1995

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