Wear of Powder Cobalt Alloys Strengthened with Titanium Carbide


Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2016, #05/06


The wear resistance of powder cobalt alloys with titanium carbide is studied in conditions of fretting corrosion at 20, 300, 650, 800, and 1050 °C under varying loads and durations. The alloys of different porosity were obtained by hot pressing of cobalt, chromium, aluminum, iron, and titanium carbide powders. The wear of alloys with 30, 50, and 70 vol.% carbide was determined. The dependence of the average linear wear of powder alloys on the samples’ porosity and loads during the test was established. Temperature has the greatest influence on the wear resistance of alloys: average linear wear rates increase with increasing temperature, regardless of the carbide content. The results are the basis for choosing the optimal alloy composition for field tests to develop friction materials for aviation purposes.