Flaky ceramic/aluminum alloy composite material and preparation method thereof

A composite material and aluminum alloy technology, which is applied in the field of sheet ceramic/aluminum alloy composite material and its preparation, can solve the problems of poor interface bonding performance and complicated process, and achieves improved bending strength and deformation resistance, and simple preparation process. , the effect of improving mechanical properties

Pending Publication Date: 2021-06-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the current connection methods, whether it is solid phase bonding, brazing, or other conn

Method used

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  • Flaky ceramic/aluminum alloy composite material and preparation method thereof
  • Flaky ceramic/aluminum alloy composite material and preparation method thereof
  • Flaky ceramic/aluminum alloy composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation of sheet ceramic / aluminum alloy composite material comprises the following steps:

[0037] (1) Choose a SiC ceramic sheet with a pressureless sintering purity greater than 99%, use acetone solution for ultrasonic cleaning to remove the oily surface of the ceramic, and then use hydrofluoric acid to clean it, and then use 10-20 mesh white corundum to clean the ceramic sheet at 0.8MPa The surface is sandblasted to roughen the surface of the ceramic sheet, and then the corundum grit is removed;

[0038] (2) Plasma spraying Ti-Al alloy on the ceramic sheet after the surface roughening in step (1): use plasma spraying equipment to spray Ti-Al alloy on the surface of the ceramic sheet to form a thin film with a film thickness of 50 μm; the spraying parameters are: current 620A, voltage 60V, spray distance 10cm, powder feeding voltage 5V, powder feeding carrier gas 200L / h, gun speed 100mm / s;

[0039] In the Ti-Al alloy, the Al content is 25wt%;

[0040](3) Use...

Embodiment 2

[0049] The preparation of sheet ceramic / aluminum alloy composite material, the steps are as follows:

[0050] (1) Choose a SiC ceramic sheet with a pressureless sintering purity greater than 99%, use acetone solution for ultrasonic cleaning to remove the oily surface of the ceramic, and then use hydrofluoric acid to clean it, and then use 10-20 mesh white corundum to clean the ceramic sheet at 0.8MPa The surface is sandblasted to roughen the surface of the ceramic sheet, and then the corundum grit is removed;

[0051] (2) Plasma spray Ti-Al alloy on the ceramic sheet after the surface roughening in step (1): use plasma spraying equipment to spray Ti-Al alloy on the surface of the ceramic sheet to form a thin film with a film thickness of 30 μm; the spraying parameters are: current 600A, voltage 65V, spraying distance 8cm, powder feeding voltage 6V, powder feeding carrier gas 180L / h, gun speed 90mm / s;

[0052] In the Ti-Al alloy, the Al content is 20wt%;

[0053] (3) Use a mo...

Embodiment 3

[0064] The preparation of sheet ceramic / aluminum alloy composite material comprises the following steps:

[0065] (1) Select B with pressureless sintering purity greater than 99% 4 C ceramic sheet, use acetone solution for ultrasonic cleaning to remove the oiliness of the ceramic surface, then use hydrofluoric acid to clean, and then use 10-20 mesh white corundum to sandblast the surface of the ceramic sheet at 0.8MPa to roughen the surface of the ceramic sheet , after removing the corundum grit;

[0066] (2) Plasma spray Ti-Al alloy on the ceramic sheet after the surface roughening in step (1): use plasma spraying equipment to spray Ti-Al alloy on the surface of the ceramic sheet to form a thin film with a film thickness of 100 μm; the spraying parameters are: current 650A, voltage 55V, spraying distance 12cm, powder feeding voltage 3V, powder feeding carrier gas 220L / h, gun speed 110mm / s;

[0067] In the Ti-Al alloy, the Al content is 30wt%;

[0068] (3) Use the mold to c...

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Abstract

The invention discloses a flaky ceramic/aluminum alloy composite material and a preparation method thereof, and belongs to the technical field of ceramic-metal connection. The composite material comprises flaky ceramic and an aluminum alloy layer, wherein the flaky ceramic is coated in the aluminum alloy layer; and a Ti-Al alloy transition layer is further arranged between the flaky ceramic and the aluminum alloy layer. The preparation method comprises the steps of plasma-spraying Ti-Al alloy on the surface of the flaky ceramic to form the transition layer, then casting an aluminum alloy, and carrying out heat treatment to obtain the composite material. According to the flaky ceramic/aluminum alloy composite material and the preparation method thereof provided by the invention, the Ti-Al alloy is used as the transition layer for connecting a ceramic chip and the metal aluminum, so that the bending strength and the deformation resistance of the composite material are obviously improved; and meanwhile, the flaky ceramic is packaged in the alloy, the ceramic is tightly fixed in situ due to the existence of the packaging metal, and the broken ceramic cannot be splashed in the using process, so that the ceramic is effectively packaged.

Description

technical field [0001] The invention belongs to the technical field of ceramic-metal connection, and in particular relates to a sheet ceramic / aluminum alloy composite material and a preparation method thereof. Background technique [0002] Engineering ceramics are high-performance structural materials, but their applications are limited due to their poor plasticity and impact resistance. Metals have properties such as high strength, ductility, and high temperature resistance, but are sometimes less rigid. Combining metal and ceramics becomes an ideal composite material, so as to exert the excellent properties of ceramics and metals. Therefore, some ceramic and metal connection technologies have been developed, such as solid phase bonding, brazing, precursor polymer connection, ceramic powder and metal casting composite, glass oxide connection and diffusion bonding, etc. [0003] At present, porous ceramics are often cast through metal to bond reinforcing materials (such as...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/08C23C4/02B22D18/06B22D19/16C22C21/02C22F1/02C22F1/043C21D9/46
CPCC23C4/134C23C4/08C23C4/02B22D18/06B22D19/16C22C21/02C22F1/02C22F1/043C21D9/46
Inventor 于杰王静洪振军杨炙坤贺良周晓龙
Owner KUNMING UNIV OF SCI & TECH
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