Studies on the improvement in wear resistance of WC-Co composites by adding a pseudo-elastic TiNi phase and relevant issues

• Author / Creator

  PAN, Yang

• In this study, pseudo-elastic TiNi alloy was added as a second phase to the Co matrix of WC-Co composite, which has found many applications in forms of coating, hardfacing overlay and bulk against wear. It was demonstrated that the added TiNi phase markedly enhanced the wear resistance of WC-60%wtCo composite. However, the beneficial effect of the TiNi phase was diminished when the amount of added TiNi exceeded 10wt% due to the formation of pores.
  The TiNi alloy was also directly used as the matrix to fabricate WC-TiNi and TiC-TiNi composites. The TiNi-matrix composites exhibited higher wear resistance than WC-Co composite when the volume fraction of the metal matrix was high, e.g., 60vol%. However, the situation was reversed when the volume fraction of the metal matrix was lowered. It appears that the formation of pores was also responsible for the deterioration of the TiNi-matrix composites.

• Subjects / Keywords

  • WC-Co composite
  • TiNi alloy
  • Pseudo-elasticity
  • Wear

• Graduation date

  Spring 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3G63D

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.