CERAMIC MATRIX COMPOSITE CUTTING BLADE FOR WOOD MACHINING AND THE METHOD OF MANUFACTURING THE CUTTING BLADE

摘要

A Cutting blade for wood machining consisting of a matrix composite comprising silicon nitride, 10 wt%to 50 wt% silicon carbide or 20 to 50 wt% titanium nitride, and 4 wt % to 10 wt% lanthana-yttria garnet or yttria-alumina garnet has been found to have a long edge life. A method of manufacturing comprises the steps of mixing a powder of said materials in a liquid, adding a binder, drying the mixture, sieving the dried mixture, sintering the mixture under pressure, hot isostatically pressing, grinding, polishing and annealing. The cutting blade is less subject to wear when provided with a micro-champfer.