热处理对硬质合金表面Co转变及生长金刚石涂层的影响
Effect of Heat Treatment on Co Conversion and Growth of Diamond Coating on Cemented Carbide Surface
DOI: 10.12677/MS.2020.107068, PDF,    科研立项经费支持
作者: 曾己伟：华南理工大学材料科学与工程学院，广东 广州；广州汇专绿色工具有限公司，广东 广州；李伟秋：广州汇专绿色工具有限公司，广东 广州；彭继华*：华南理工大学材料科学与工程学院，广东 广州
关键词: 热处理；硬质合金；金刚石涂层；THot Treatment； Cemented Carbide； Diamond Coating
摘要: 利用热处理将YG6硬质合金表层的Co转变为Co化合物，然后采用自行研发的热丝CVD设备在热处理过后的YG6硬质合金表面沉积约2.2 μm厚度的金刚石涂层。采用X射线衍射仪、扫描电子显微镜、拉曼光谱仪、X射线光电子能谱仪、洛氏硬度计对热处理过后的YG6硬质合金表层物相与组织、金刚石涂层质量进行表征。分析结果表明，采用热处理可将硬质合金表层一定深度内的Co完全转化为Co3W。该转化层可阻挡Co扩散至金刚石涂层，有效促进金刚石涂层的形核和生长。热处理气氛中的H2含量过低使部分Co被氧化，将降低金刚石涂层质量，导致菜花状纳米金刚石涂层形成，氧化严重时甚至会使金刚石涂层无法形成。
Abstract: The Co on the surface of YG6 cemented carbide was transformed into Co compound by heat treat-ment. Then the diamond coating of about 2.2 μm thickness was deposited on the surface of YG6 carbide after heat treatment by using the self-developed hot filament CVD equipment. X-ray dif-fractometer, scanning electron microscope, Raman spectrometer, X-ray photoelectron spectrometer and Rockwell hardness tester were used to characterize the surface phase and organization of YG6 carbide and the quality of diamond coating after heat treatment. The analysis results show that the Co in certain depth of surface layer of cemented carbide can be completely transformed into Co3W by heat treatment. The conversion layer can prevent Co diffusion to diamond coating and effectively promote the nucleation and growth of diamond coating. The low H2 content in the heat treatment atmosphere leads to the oxidation of part of Co, which will reduce the quality of diamond coating and lead to the formation of cauliflower-like nano-diamond coating. Severe oxidation will even make diamond coating unable to form.
文章引用：曾己伟, 李伟秋, 彭继华. 热处理对硬质合金表面Co转变及生长金刚石涂层的影响[J]. 材料科学, 2020, 10(7): 562-569. https://doi.org/10.12677/MS.2020.107068

参考文献

[1] Yuan, Z., Guo, Y., Li, C., Liu, L., Yang, B., Song, H., Zhai, Z., Lu, Z., Li, H., Staedler, T., Huang, N and Jiang, X. (2020) New Multilayered Diamond/β-SiC Composite Architectures for High-Performance Hard Coating. Materials and Design, 186, Article ID: 108207. [Google Scholar] [CrossRef] 
[2] Yan, G., Wu, Y., Cristea, D., Lu, F., Wang, Y., Zhao, D., Tierean, M. and Liu, L. (2019) Machining Performance of Hard-Brittle Materials by Multi-Layer Micro-Nano Crystalline Diamond Coated Tools. Results in Physics, 13, Article ID: 102303. [Google Scholar] [CrossRef] 
[3] Ramasubramanian, K., Arunachalam, N. and Ramachandra Rao, M.S. (2019) Wear Performance of Nano-Engineered Boron Doped Graded Layer CVD Diamond Coated Cutting Tool for Machining of Al-SiC MMC. Wear, 426-427, 1536-1547. [Google Scholar] [CrossRef] 
[4] Esconjauregui, S., Whelan, C.M. and Maex, K. (2009) The Rea-sons Why Metals Catalyze the Nucleation and Growth of Carbon Nanotubes and Other Carbon Nanomorphologies. Carbon, 47, 659-669. [Google Scholar] [CrossRef] 
[5] 郭晓光, 刘涛, 翟昌恒, 苑泽伟, 金洙吉, 郭东明. 过渡金属作用下的金刚石石墨化机理研究[J]. 机械工程学报, 2016, 52(20): 23-29.
[6] Li, X.J., He, L.L., Li, Y.S. and Yang, Q. (2019) Catalytic Graphite Mechanism during CVD Diamond Film on Iron and Cobalt Alloys in CH4-H2 Atmospheres. Surface & Coatings Technology, 360, 20-28. [Google Scholar] [CrossRef] 
[7] Wang, X., Wang, C., He, W. and Sun, F. (2018) Co evolutions for WC-Co with Different Co Contents during Pretreatment and HFCVD Diamond Film Growth Processes. Transactions of Nonferrous Metals Society of China, 28, 469-486. [Google Scholar] [CrossRef] 
[8] Deuerler, F., Berg, H., Tabersky, R., Freundlieb, A., Pies, M. and Buck, V. (1996) Pretreatment of Substrate Surface for Improved Adhesion of Diamond Films on Hard Metal Cutting Tools. Diamond and Related Materials, 5, 1478-1489. [Google Scholar] [CrossRef] 
[9] Ye, F., Li, Y., Sun, X., Yang, Q., Kim, C. and Odeshi, A.G. (2016) CVD Diamond Coating on WC-Co Substrate with Al-Based Interlayer. Surface & Coatings Technology, 308, 121-127. [Google Scholar] [CrossRef] 
[10] Fischer, M., Chandran, M., Akhvlediani, R. and Hoffman, A. (2016) Interplay between Adhesion and Interfacial Properties of Diamond Films Deposited on WC-10%Co Substrates Using a CrN Interlayer. Diamond & Related Materials, 70, 167-172. [Google Scholar] [CrossRef] 
[11] Park, J., Lee, H., Lee, W. and Baik, Y. (2014) Effect of TiAl-Based Interlayer on the Surface Morphology and Adhesion of Nanocrystalline Diamond Film Deposited on WC-Co Substrate by Hot Filament CVD. Surface & Coatings Technology, 258, 108-113. [Google Scholar] [CrossRef] 
[12] Hei, H., Ma, J., Li, X., Yu, S., Tang, B., Shen, Y. and Tang, W. (2015) Preparation and Performance of Chemical Vapor Deposition Diamond Coatings Synthesized onto the Cemented Carbide Micro-End Mills with a SiC Interlayer. Surface & Coatings Technology, 261, 272-277. [Google Scholar] [CrossRef] 
[13] Wang, G., Lu, X., Ding, M., Liu, Y., Tang, W. and Zhang, B. (2017) Diamond Coatings Deposited on Cemented Carbide Substrates with SiC as Interlayers: Preparation and Erosion Resistance Tests. Diamond & Related Materials, 73, 105-113. [Google Scholar] [CrossRef] 
[14] Peng, J., Zeng, J., Xiong, C. and Li, L. (2020) The Effect of Interlayer Reactivity on the Quality of Diamond Coating by HFCVD Deposition. Journal of Alloys and Compounds, 835, Article ID: 155035. [Google Scholar] [CrossRef] 
[15] Tang, W., Wang, Q., Wang, S. and Lu, F. (2002) A Compar-ison in Performance of Diamond Coated Cemented Carbide Cutting Tools with and without a Boride Interlayer. Surface and Coatings Technology, 153, 298-303. [Google Scholar] [CrossRef] 
[16] Tang, W., Wang, S. and Lu, F. (2000) Preparation and Per-formance of Diamond Coatings on Cemented Carbide Inserts with Cobalt Boride Interlayers. Diamond and Related Materials, 9, 1744-1748. [Google Scholar] [CrossRef] 
[17] Lai, W., Wu, Y., Chang, H. and Lee, Y. (2011) Enhancing the Adhesion of Diamond Films on Cobalt-Cemented Tungsten Carbide Substrate Using Tungsten Particles via MPCVD System. Journal of Alloys and Compounds, 509, 4433-4438. [Google Scholar] [CrossRef] 
[18] Sun, F.H., Zhang, Z.M., Chen, M. and Shen, H.S. (2003) Im-provement of Adhesive Strength and Surface Roughness of Diamond Films on Co-Cemented Tungsten Carbide Tools. Diamond and Related Materials, 12, 711-718. [Google Scholar] [CrossRef] 
[19] Guo, S., Bao, R., Li, S., Ye, Y., Zhu, E., Wang, W., Zhang, Y., Chen, H. and Ye, Y. (2020) The role of Y2O3, Cu, Mo and Mo2C Additives on Optimizing the Corrosion Resistance of WC-6Co Cemented Carbide in HCl and NaOH Solutions. Journal of Alloys and Compounds, 827, Article ID: 154269. [Google Scholar] [CrossRef] 
[20] Okamoto, H. (2002) Co-W (Cobalt-Tungsten). Journal of Phase Equilibria, 23, Article No. 193. [Google Scholar] [CrossRef] 
[21] Donnet, J.B., Paulmier, D., Oulanti, H. and Le Huu, T. (2004) Diffusion of Cobalt in Diamond Films Synthesized by Combustion Flame Method. Carbon, 42, 2215-2221. [Google Scholar] [CrossRef] 
[22] Dumpala, R., Ramamoorthy, B. and Rao, M.S.R. (2014) Graded Composite Diamond Coatings with Top-Layer Nanocrystallinity and Interfacial Integrity: Cross-Sectional Raman Mapping. Applied Surface Science, 289, 545-550. [Google Scholar] [CrossRef] 
[23] Hua, C., Yan, X., Wei, J., Guo, J., Liu, J., Chen, L., Hei, L. and Li, C. (2017) Intrinsic Stress Evolution during Different Growth Stages of Diamond Film. Diamond & Related Materials, 73, 62-66. [Google Scholar] [CrossRef] 
[24] Yeh, C., Chang, H., Leou, K. and Lin, I. (2016) Plasma Post-Treatment Process for Enhancing Electron Field Emission Properties of Ultrananocrystalline Diamond Films. Diamond & Related Materials, 63, 197-204. [Google Scholar] [CrossRef] 
[25] Tian, Q., Huang, N., Yang, B., Zhuang, H., Wang, C., Zhai, Z., Li, J., Jia, X., Liu, L. and Jiang, X. (2017) Diamond/β-SiC Film as Adhesion-Enhanced Interlayer for Top Diamond Coatings on Cemented Tungsten Carbide Substrate. Journal of Materials Science & Technology, 33, 1097-1106. [Google Scholar] [CrossRef] 
[26] Wang, T., Xin, H.W., Zhang, Z.M., Dai, Y.B. and Shen, H.S. (2004) The Fabrication of Nanocrystalline Diamond Films Using Hot Filament CVD. Diamond and Related Materials, 13, 6-13. [Google Scholar] [CrossRef] 
[27] Almeida, F.A., Carrapichano, J.M., Fernandes, A.J.S., Sac-ramento, J., Silva, R.F. and Oliveira, F.J. (2011) Nanocrystalline CVD Diamond Coatings for Drilling of WC-Co Parts. International Journal of Refractory Metals and Hard Materials, 29, 618-622. [Google Scholar] [CrossRef] 

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