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以异丙醇铝为前驱物，将溶胶－凝胶工艺应用于硬质合金刀片涂层，研制成功一种新型的陶瓷涂层刀片，从而为涂层刀具制造展示了一种全新的涂层方法。使用浸渍提拉法对刀具基体进行涂层，然后经凝胶、干燥和1200 ℃热处理后可以得到厚度适宜的α—A12O3涂层，涂层完整，无宏观缺陷，并且在初步的切削试验中显示出一定效果。涂层在1140 ℃左右转化成α—A12O3，在1200 ℃烧结致密，而在1250 ℃以上涂层发生明显收缩，晶粒明显长大，最终的涂层为多晶体结构，涂层界面未生成弱化相，硬质合金中的部分钴元素扩散到涂层中，有助于提高涂层和基体间的粘结强度。切削试验的结果表明，所得涂层能有效地阻止前刀面上的粘结磨损，从而提高了刀具的使用寿命。
Aluminum isopropoxide as a precursor, the sol-gel process was applied to the cemented carbide blade coating, the successful development of a new type of ceramic coating blade, so that the coating cutter manufacturing showed a new coating method . The dip-coating method was used to coat the tool substrate. After the gel, dried and heat-treated at 1200 ℃, a suitable thickness of α-A12O3 coating was obtained. The coating was complete without macroscopic defects and was shown in the preliminary cutting test A certain effect. The coating was transformed into α-A12O3 at about 1140 ℃ and sintered compactly at 1200 ℃. While the coating was obviously shrunk at 1250 ℃, the crystal grains grew obviously. The final coating was polycrystalline structure and the coating interface was not weakened Phase, part of the cobalt carbide elements diffuse into the coating, helping to improve the bond strength between the coating and the matrix. Cutting test results show that the resulting coating can effectively prevent the rake surface bond wear, thereby increasing the service life of the tool.