Influences of porosity on mechanical and wear performance of pseudoelasticTiNi-matrix composites

Pores usually exist in sintered tribe-composites and may strongly affect th e performance of the composites. In this work, the influence of pores on th e wear behavior of sintered pseudoelastic TiNi-matrix tribo-composites was investigated. In particular, changes in the density of pores and correspond ing variations in wear resistance of the composites were studied, It was de monstrated that mechanical properties and the wear resistance of the compos ites were strongly affected by voids. The wear resistance was enhanced when the density of pores was reduced by using wax to enhance the compaction du ring pressing. It was also interesting to observe that pores are sealed dur ing the wear process. This results in improving wear resistance during wear , especially under high loads, Some other contributing mechanisms are also discussed.