Effect of Oxygen Introduction on Oxidation Resistance, Oxygen Amountand Cutting Performance of Silicon Nitride Based Ceramics

摘要

In order to clarify the wear resistance as cutting tools, the relationship between oxygen addition and cutting performances of the beta-Si_3N_4 ceramics with 5 mass percent Y_2O_3 and 2 or 4 mass percent Al_2O_3 was investigated. From test results, we could conclude that the mechanical properties of beta-Si_3N_4 ceramics depending on oxygen introduction are effective on cutting performance improvements of beta-Si_3N_4 ceramics.