Paper Title:
Fracture Characterization of TiAl Matrix Composites by Addition of Fluoride Solid Lubricants
  Abstract

The fracture characterization of Ti–48Al–2Nb-2Cr composites (TANC) with addition of different weight contents of fluoride solid lubricants (LiF, NaF, CaF2 and 38%CaF2-62%BaF2 eutectic solid lubricant (BC) ) were evaluated in the paper. The fracture toughness of composites with different content of fluoride solid lubricants is discussed. The TANC composites with 0-5 wt.% solid lubricant exhibit higher fracture toughness. It can be seen that additions of all fluoride solid lubricants to TANC matrix result in decrease in fracture toughness expect for additions of 5% of that. By adding 5 wt.% BC the fracture toughness of the TANC composites exhibited a maximum value of 12.2MPa m1/2; by addition of 5%CaF2, 11.4 MPa m1/2; 5%LiF, 10.8 MPa m1/2 while 5%NaF, 11.1 MPa m1/2. However, with further increasing of fluoride solid lubricants contents it showed a downward trend. By adding 20 wt.% BC the fracture toughness of the TANC composites exhibited a maximum value of 8.6 MPa m1/2; by addition of 20%CaF2, 8.1 MPa m1/2; 20%LiF, 8.3 MPa m1/2 while 5%NaF, 7.9 MPa m1/2.

  Info
Periodical
Advanced Materials Research (Volumes 123-125)
Edited by
Joong Hee Lee
Pages
97-100
DOI
10.4028/www.scientific.net/AMR.123-125.97
Citation
L. Y. Yang, S. R. Wang, Y. J. Wang, B. Zhu, L. Hou, "Fracture Characterization of TiAl Matrix Composites by Addition of Fluoride Solid Lubricants", Advanced Materials Research, Vols. 123-125, pp. 97-100, 2010
Online since
August 2010
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$32.00
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