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
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • 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.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Department of Chemical and Materials Engineering
  • Supervisor / co-supervisor and their department(s)
    • Li, Dongyang (Chemical and Materials Engineering)
  • Examining committee members and their departments
    • Xia, Zihui (Mechanical Engineering)
    • Prasad, Vinay (Chemical and Materials Engineering)
    • Eadie, Reginald (Chemical and Materials Engineering)