籽晶种植及掺硼形核对硬质合金表面金刚石涂层的影响

doi:10.19976/j.cnki.43-1448/TF.2023035

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Abstract In order to improve the quality of diamond coating on cemented carbide tools and increase the nucleation density to enhance the uniformity of the coating, the hot filament chemical vapor deposition was used to deposit nanodiamonds (NDs) onto the surface of YG8 cemented carbide substrate, the effects of seed crystal planting and boron doping in the nucleation stage on the nucleation and growth of diamond coatings were studied. The results show that when hydrogen-terminated nano-diamond suspension with a mass concentration of 1.0% is used for seed crystal plant, the seed density on the sample surface is the highest, the distribution is the most uniform, and the subsequent growing diamond grain size is finer and more uniform, which can improve the uniformity and flatness of the coating. Boron-doped nucleation can inhibit the formation of graphite phase in the diamond coating and improve the purity of the diamond coating, but increase the full width at half maximum (FWHM) of the diamond peak, which will have an adverse effect on diamond crystallization. Seed crystal planting can reduce the FWHM of diamond peak from 17.43 cm^-1 to 10.91 cm^-1, improve the quality of boron-doped nucleation crystallization, and weaken the adverse effects of boron-doped. By combining boron doping and seed crystal planting, the minimum diamond grain size is about 1-3 μm, the I_D/I_G value is as high as 12.83, and the coating quality is good. In addition, under the joint action of seed crystal planting and boron-doped nucleation, the bonding performance of the diamond coating is significantly improved, and it can reach the HF1 level at 600 N.

Key words： diamond coating seed crystal planting boron-doped nucleation grain size bonding property

Received: 23 March 2023 Published: 21 September 2023

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	Articles by authors
	YU Han
	XIA Xin
	ZHU Junkui
	WANG Run
	ZHANG Long
	DOU Jinjie
	LI Jing
	MA Li
	WEI Qiuping

Cite this article:

YU Han,XIA Xin,ZHU Junkui, et al. Effects of seeding and boron-doped nucleation on diamond coating of cemented carbide surface[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(4): 404-412.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023035 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I4/404

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