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Self-lubricating metal-ceramic composite material with biomimetic structure and preparation method thereof

A technology of cermet and composite materials, which is applied in the field of self-lubricating cermet composite materials and its preparation, can solve the problems of low bending strength, improve compression and shear strength, enhance interface bonding, and have good interface bonding Effect

Active Publication Date: 2019-05-03
NANCHANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the present invention provides a kind of self-lubricating metal-ceramic composite material with biomimetic structure, to overcome Al 2 o 3 / nBN self-lubricating composite ceramics technical problem of low flexural strength

Method used

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  • Self-lubricating metal-ceramic composite material with biomimetic structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] In this example, a self-lubricating metal-ceramic composite material with a bionic structure, the preparation process is as follows: Weigh 67.55% of Al with a size of 50-100 μm in proportion. 2 o 3 , 2.45% Al with a size of 20-60nm 2 o 3 , 15% SiO with a size of 50-100 μm 2 , 10% MgO powder with a size of 50-100μm, 2% B with a size of 20-60nm 2 o 3 and 3% Fe powder, mix the above-mentioned components, and add 2 times the weight of absolute ethanol to mix evenly, and injection molding is made into a cermet matrix layer with a thickness of 1.0mm; then weigh 95% hBN and 5% The nano-carbon, stirred evenly, is evenly sprayed on the cermet matrix layer to form a lubricating layer with a thickness of 0.025mm; the cermet matrix layer and the lubricating layer are alternately laminated, and the total number of layers is 33 layers to obtain a ceramic blank. The billet is sintered in a hot-press furnace, and the whole sintering process is carried out under vacuum. During hot-...

Embodiment 2

[0023] In this embodiment, a self-lubricating metal-ceramic composite material with a bionic structure, the preparation process is as follows: Weigh 65% of Al with a size of 50-100 μm in proportion. 2 o 3 , 14.25% SiO with a size of 50-100 μm 2 , 0.75% SiO with a size of 20-60nm 2 , 12% MgO powder with a size of 50-100 μm, 4% B with a size of 20-60 nm 2 o 3 and 4% Fe powder, mix the above-mentioned components, and add 2 times the weight of absolute ethanol to mix evenly, and injection molding is made into a cermet matrix layer with a thickness of 2.0mm; then weigh 98% hBN and 2% The nano-carbon, stirred evenly, is uniformly sprayed on the cermet matrix layer to form a lubricating layer with a thickness of 0.05mm; the cermet matrix layer and the lubricating layer are alternately laminated, and the total number of layers is 27 layers to obtain a ceramic blank. The billet is sintered in a hot-press furnace, and the whole sintering process is carried out under vacuum. During h...

Embodiment 3

[0025] In this embodiment, a self-lubricating metal-ceramic composite material with a bionic structure, the preparation process is as follows: Weigh 66.64% of Al with a size of 50-100 μm in proportion. 2 o 3 , 1.36% Al with a size of 20-60nm 2 o 3 , 11.76% SiO with a size of 50-100 μm 2, 0.24% SiO with a size of 20-60nm 2 , 10% MgO powder with a size of 50-100 μm, 4% B with a size of 20-60 nm 2 o 3 and 6% Fe powder, mix the above components, and add 2 times the weight of absolute ethanol to mix evenly, and injection molding is made into a cermet matrix layer with a thickness of 1.0mm; then weigh 95% hBN and 5% The nano-carbon, stirred evenly, is evenly sprayed on the cermet matrix layer to form a lubricating layer with a thickness of 0.035mm; the cermet matrix layer and the lubricating layer are alternately laminated, and the total number of layers is 33 layers to obtain a ceramic blank. The billet is sintered in a hot-press furnace, and the whole sintering process is ca...

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Abstract

The invention discloses a self-lubricating metal ceramic composite with a bionic structure. The composite is provided with a structure formed by alternative stacking of a metal ceramic base body layer and a lubricating layer; the raw material of the metal ceramic base body comprises 65 to 72% of Al2O3, 12 to 15% of SiO2, 10 to 12% of MgO micro powder, 2 to 4% of B2O3, and 3 to 6% of Fe powder, wherein the sum of the raw materials is 100%; the raw material of the lubricating layer comprises 92 to 98% of hBN and 2 to 8% of nano carbon; the thickness of the lubricating layer ranges from 0.025 mm to 0.05 mm, and the thickness ratio of the metal ceramic base body layer to the lubricating layer is 30 to 40:1. On the basis of the Al2O3 / hBN self-lubricating composite ceramic base body, the micro-nano composite powder serves as the raw material, through the material bionic structural design, the layered composite ceramic with the strong-weak multilayer interface characteristics is prepared, and the material structure / lubricating function integrated design is achieved while the good ceramic mechanical property is improved.

Description

technical field [0001] The invention belongs to the technical field of metal-ceramic composite materials, and in particular relates to a self-lubricating metal-ceramic composite material with a bionic structure and a preparation method thereof. Background technique [0002] Engineering ceramics have many excellent properties such as high temperature resistance, wear resistance, corrosion resistance, high strength, and oxidation resistance. They are ideal materials for manufacturing high-temperature lubricating and wear-resistant components. Among them, the self-lubricating material composite ceramics has good high-temperature friction properties, and is a valuable and promising ceramic lubrication technology. Self-lubricating composite ceramics are solid lubricants such as graphite, MoS 2 , Hexagonal boron nitride or Au, Ag and other soft metals are introduced into ceramic materials to make ceramic composite materials. Since the added solid lubricating components are easy t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/12C22C26/00C22C1/05C22C1/10
CPCC22C1/051C22C26/00C22C29/005C22C29/12C22C2026/003C22C2204/00
Inventor 胡瑞许春霞谭德坤朱春生卢全国
Owner NANCHANG INST OF TECH