A kind of polycrystalline diamond composite sheet and preparation method thereof
A technology of polycrystalline diamond and composite sheet, which is applied in metal material coating process, vacuum evaporation plating, coating, etc., can solve the problem that polycrystalline diamond composite sheet cannot have both high wear resistance and heat resistance, etc. Achieve the effects of improving thermal conductivity, excellent mechanical and thermal properties, and benefiting residual stress
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Embodiment 1
[0040] The polycrystalline diamond compact sheet with good heat resistance in this embodiment includes a cemented carbide substrate, a transition coating and a polycrystalline diamond layer sequentially arranged on the cemented carbide substrate; the polycrystalline diamond layer is composed of the following weight percentages Composition of raw materials: 69.5% of coated diamond powder, 20% of coated cubic boron nitride powder, 0.3% of carbon nanotubes, 0.2% of graphene and 10% of binder; the transition coating is Si in order 3 N 4 coating and Si coating, the Si 3 N 4 The thickness of the coating is 10 μm, and the thickness of the Si coating is 15 μm; the coating of the coated diamond micro-powder is Si, and the thickness of the coating is 80 nm, and the coated diamond micro-powder is boron-containing diamond micro-powder, and boron element in the boron-containing diamond micro-powder The content is 0.0002 to 1%; the coating of the coated cubic boron nitride micro-powder is...
Embodiment 2
[0054] The polycrystalline diamond compact sheet with good heat resistance of this embodiment includes a cemented carbide base, a transition coating and a polycrystalline diamond layer sequentially arranged on the cemented carbide base; the polycrystalline diamond layer is composed of the following weight percentages Raw material composition: 79.7% of coated diamond powder, 15% of coated cubic boron nitride powder, 0.2% of carbon nanotube, 0.1% of graphene and 5% of binder; the transition coating is Si in order 3 N 4 Coatings and Si coatings, Si 3 N 4 The thickness of the coating is 6 μm, and the thickness of the Si coating is 10 μm; the coating of the coated diamond micro-powder is W, and the thickness of the coating is 120 nm; the coated diamond micro-powder is a boron-containing diamond micro-powder, and the boron element of the boron-containing diamond micro-powder is The content is 0.0002 to 1%; the coating of the coated cubic boron nitride micro-powder is Ti, and the t...
Embodiment 3
[0067] The polycrystalline diamond compact sheet with good heat resistance of this embodiment includes a cemented carbide base, a transition coating and a polycrystalline diamond layer sequentially arranged on the cemented carbide base; the polycrystalline diamond layer is composed of the following weight percentages Composition of raw materials: 74.6% of coated diamond powder, 17.5% of coated cubic boron nitride powder, 0.25% of carbon nanotubes, 0.15% of graphene and 7.5% of binder; the transition coating is Si in order 3 N 4 Coatings and Si coatings, Si 3 N 4 The thickness of the coating is 8 μm, and the thickness of the Si coating is 12.5 μm; the coating of the coated diamond micro-powder is Ni, and the thickness of the coating is 100 nm; the coated diamond micro-powder is a boron-containing diamond The element content is 0.0002-1%; the coating layer of the coated cubic boron nitride micro-powder is Mo, and the coating thickness is 100 nm; the particle size of the coated...
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Abstract
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