| Popis: |
NiCoCrAlY coating with high density was prepared on the surface of the magnesium alloy by cold spraying. Compared with the magnesium alloy prepared by the methods of the semi-continuous casting, the wear resistance and wear mode were analyzed by the experiments. The results showed that, under the dry friction condition, the conditions of the weightlessness of wear of NiCoCrAlY coating were better than that of the magnesium alloy. After the frictional experiment for 20 minutes, the weightlessness of wear of NiCoCrAlY coating was 10mg. Compared with that of the magnesium alloy, the weightlessness of wear was lower than 28%. Consequently, the NiCoCrAlY coating had the capacity of the weightlessness of wear resistance. By the comparisons of the every samples friction morphology, the wear modes of the NiCoCrAlY coating were adhesive wear and abrasive wear. And the wear modes of magnesium alloy were also adhesive wear and abrasive wear with corrosive wear and fatigue wear. |
