| 摘要 |
According to the present invention there is now provided a ceramic cutting tool material comprising an oxide-based, preferably aluminium oxide based, matrix with 5-50, preferably 10-40 % by volume of homogeneously dispersed whiskers based upon nitrides, carbides and/or borides of metals from group IVB (Ti,Zr,Hf) and/or VB(V,Nb,Ta) in the periodic system or solid solutions thereof and 1-20, preferably 3-8 % by volume of particulate additions with a size < 500 nm, preferably < 200 nm, based upon carbides, nitrides and/or borides of metals from group IVB (Ti,Zr,Hf) and/or VB(V,Nb,Ta) in the periodic system or solid solutions thereof. The nanosize particulate additions are predominantly present inside the matrix grains and not in the grain boundaries. |
