D. Jianxin et al. International Journal of Machine Tools Manufacture 45(2005)1393-1401 Fig. 7. SEM micrographs of the wear profile of ABW20 ceramic cutting tool when machining Inconel718 nickel-based alloys(test conditions: cutting speed v=80 m/min, depth of cut ap=0.3 mm, feed rates f=0.15 mm/r). There was experimental evidence of diffusion of Ni and Co Mo did not greatly penetrate into the ceramic tool surfaces, element of Inconel718 nickel-based alloys to the tool while the Ni and Co of the Inconel718 nickel-based alloys materials. EDX analysis of the cross-section of AB W20 is diffused a long way into the rake face of AB W20 ceramic shown in Fig. 11. The dashed line represents the EDX line tool. Ni and Co has a low melting point and may lower the of ni co Cr and mo elements. It can be seen that Cr and hardness of the ceramic tool surface Fig 8. SEM micrographs of the serrated chips when machining Inconel718 nickel-based alloys with AB W20 ceramic cutting tool(test conditions: cutting speed v=80 m/min, depth of cut ap=0.3 mm, feed rates f=0.15 mm/r).There was experimental evidence of diffusion of Ni and Co element of Inconel718 nickel-based alloys to the tool materials. EDX analysis of the cross-section of ABW20 is shown in Fig. 11. The dashed line represents the EDX line of Ni, Co, Cr and Mo elements. It can be seen that Cr and Mo did not greatly penetrate into the ceramic tool surfaces, while the Ni and Co of the Inconel718 nickel-based alloys diffused a long way into the rake face of ABW20 ceramic tool. Ni and Co has a low melting point and may lower the hardness of the ceramic tool surface. Fig. 7. SEM micrographs of the wear profile of ABW20 ceramic cutting tool when machining Inconel718 nickel-based alloys (test conditions: cutting speed vZ80 m/min, depth of cut apZ0.3 mm, feed rates fZ0.15 mm/r). Fig. 8. SEM micrographs of the serrated chips when machining Inconel718 nickel-based alloys with ABW20 ceramic cutting tool (test conditions: cutting speed vZ80 m/min, depth of cut apZ0.3 mm, feed rates fZ0.15 mm/r). 1398 D. Jianxin et al. / International Journal of Machine Tools & Manufacture 45 (2005) 1393–1401