After the electroless plating of diamond, the obvious boundary between the diamond and the nickel-cobalt-based coating disappeared, and some scattered nickel-cobalt joints were grown on the bonding surface of the diamond and the coating [21]. The electroplated diamond tool was prepared from the activated diamond, and the material removal amount was 1.5 times that of the unactivated treatment when grinding the Al2O3 ceramic workpiece [21]. However, with this method, the diamond particles and the coating may be chemically combined in the original sense, and the true chemical bond is not achieved, and the intermolecular force may account for a larger proportion.
3.2 CVD method [22]
Using diamond CVD deposition technology to repair the prepared diamond tools, not only can the newly formed diamonds be deposited in the gaps in the tool, but also the diamond particles in the tool can be regenerated, and the surface is further developed and improved. Particle properties. The MPCVD method has been successfully used for void repair occurring between diamond particles and carcass metal after electroplating. Observation of the surface topography of an electroplated diamond tool prepared using diamond particles having an average size of 16 μm under SEM revealed irregularities and irregularities in the surface, and concave and voids between the diamond particles and the carcass metal. The tool was placed in an MPCVD system and the average size of the diamond particles was increased to 25 μm. The gap between the diamond particles and the carcass metal was compensated by SEM and the surface of the diamond particles was regular and full [22]. This method is used to repair the electroplated diamond tool, which has higher cutting force, wear resistance and particle bonding than the unrepaired electroplated diamond tool. At high temperatures during the MPCVD process, carbon-metal bonds are formed between the diamond and the carcass, creating a strong bond between the diamond particles and the carcass metal [22].
References [1] Guo Hetong, Zhang Sanyuan. Composite Coating [M]. Tianjin: Tianjin University Press, 1991.
[2] Li Dabo. Electroplated diamond bit technology [M]. Beijing: Geological Publishing House, 1995.
[3] Wang Qinsheng. Electroplating Technology of Superhard Materials [M]. Zhengzhou: China Abrasives Industry Co., Ltd., 1989.
[4] Li Chaoqun. Selection of carcass material for electroplated diamond bit [J]. Superhard Materials and Engineering, 1999(2): 19~23
[5] Li Dabo et al. Research and Application of Electroplated Diamond Bits in China[J]. Prospecting Engineering, 1996(4): 41~43
[6] Li Chaoqun. Application of Electroplated Nickel-Manganese Carcass Diamond Bits[J]. Prospecting Engineering, 1998(2): 36~38
[7] Li Yundong et al. Study on New Coatings in Electroplated Diamond Tools[J]. ææ–™ä¿æŠ¤,2002,35(12):12～13
[8] Bao Xuejin et al. Study on nickel-cobalt composite coating containing nano-diamond powder[J].Diamond & Abrasives Engineering,2006(1):39～42
[9] Li Chengming et al. Friction and wear properties of metal-nano-diamond composite coatings[J].Diamond & Abrasives Engineering,2004(1):39～42
[10] Li Chaoqun. Diamond Drill Bits in Composite Plating Process[J]. Geology and Prospecting, 1995, 31(1): 63~64
[11] Gao Hongyu et al. Effect of rare earth lanthanum on the performance of electroplated diamond tools [J]. Diamond and Abrasives Engineering, 2006 (5): 66 ~ 68
[12] Chen Xiaohua et al.Study on the Process of Electrodeposited Nickel-carbon Sodium Tube Composite Coating[J].Surface Technology,2004,31(2):36～39
[13] Wang Qinsheng. Mechanism of Ultrasonic Strengthening Electroplating Process and Improving Coating Quality [J]. Industrial Diamond, 2003 (4 ~ 5): 69 ~ 72
[14] Wang Xiuzhi et al. Effect of Ultrasound on Preparation Process of Electroplated Diamond Tools[J]. Abrasives Communication, 2006(3): 11~12
[15] Wang Liping.Effect of Pulse Current Density on Texture and Hardness of Electrodeposited Nanocrystalline Nickel[J].Plating & Finishing,2005,27(3):40～42
[16] Li Zhaomei et al. Application of Pulse Electrodeposition of Nanocrystalline Nickel in the Manufacturing of Diamond Tools[J]. China Surface Engineering, 2005, 18(5): 43~46
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